Wood Garage Door Factory in China: Modern Garage Door Panels, Aluminium Skins, Opener Sizing and 8×7 Garage Door Pricing

Wood garage door with woodgrain aluminium sectional panels installed on a residential house in China - timber look finish, insulated sandwich panel construction — Woodgrain aluminium sectional garage door on a residential elevation – timber-look finish on a 50 mm insulated sandwich panel, China factory build.

Reference specification for a woodgrain aluminium sectional wood garage door built in China: species movement data for the solid-timber alternative, panel build-up, wind strut sizing by door width and design pressure, EN 13241 test package, opener sizing by door mass, FOB price matrix and landed cost. Every figure below is calculated from the stated assumptions rather than quoted from a brochure.

FOB, 50 mm PU

USD 104-132 / m²

Whole-door Ud

0.71 W/m²K

16×7 door mass

181 kg

MOQ

1 door

Lead time

25-35 days

Contents

1. Three Ways to Buy a Wood Garage Door
2. Wood Movement: Dimensional Change Numbers
3. Garage Door Panels: Build-Up and Skin Gauge
4. Modern Garage Door: Woodgrain and Profiles
5. Aluminium Garage Door vs Solid Timber
6. 8×7 and 16×7: Sizes and Wind Struts
7. Thermal: Ud, Condensation, Air Leakage
8. Garage Door Opener: Weight and Cycles
9. Certification: EN 13241, NOA, UL 325
10. Woodgrain Transfer Process Parameters
11. Production Steps and Lead Time
12. FOB Price Matrix and Adders
13. Container Loading and Landed Cost
14. Installation Steps and Failure Points
15. Project Case Studies
16. Selection Guide and Maintenance Cost
17. RFQ Checklist
18. Glossary and Standards Index
19. Related Specifications

Three Ways to Buy a Wood Garage Door

The phrase “wood garage door” covers three different products with three different failure modes. Before any price comparison, decide which one the specification means.

Type 1 – Solid timber, stile-and-rail or solid slab

Cedar, meranti, iroko, oak or Accoya. Stile-and-rail construction with floating panels, or a solid slab. Weight ranges from 208 kg to 435 kg on a 16×7 opening depending on species and thickness. This is the only option that is actually wood to the core, and it is the only one that needs a maintenance schedule.

Type 2 – Timber-faced steel or composite

A steel or engineered core with a real timber veneer, or a fibre-cement / GRP skin over a timber frame. Weight sits between the two extremes. The veneer still moves with humidity, and the substrate does not, so the joint between them is where delamination starts.

Type 3 – Woodgrain aluminium sandwich panel

Aluminium skins, 0.5-0.6 mm, roll-formed and laminated to a PU foam core, then finished with a sublimated woodgrain pattern inside a powder coat film. A 16×7 door weighs 181 kg in 50 mm PU. The pattern is a printed image, the dimensional behaviour is that of aluminium – which is the entire point of the product.

Construction	16×7 door mass	Movement driver	Refinish cycle	Typical FOB / m²
Solid cedar, stile-and-rail	243 kg	Moisture content	2-3 yr	USD 155-210
Solid red oak, 35 mm	444 kg	Moisture content	3 yr	USD 210-280
Timber veneer on steel core	265-300 kg	Veneer / substrate differential	4-5 yr	USD 175-235
Woodgrain aluminium, 40 mm PU	161 kg	Thermal expansion only	none	USD 81-98
Woodgrain aluminium, 50 mm PU	181 kg	Thermal expansion only	none	USD 104-132

The mass column is the one that drives every downstream cost: the spring package, the opener class, the shipping method and the on-site labour hours. A 444 kg oak door and a 181 kg woodgrain aluminium door are not the same installation job.

Wood Movement: The Dimensional Change Numbers

Wood changes size below the fibre saturation point, roughly 28 percent moisture content. Above it, no dimensional change occurs; below it, every 1 percent of moisture lost shrinks the board. The movement coefficient is species-specific and anisotropic – tangential shrinkage is typically 1.8 to 2.5 times radial shrinkage, which is why flat-sawn boards cup.

Equilibrium moisture content in service

A garage door sees both the outside air and the interior of the garage. In a temperate coastal climate the swing is wide; in a heated garage in a cold winter it is wider still.

Relative humidity at 20 °C	Equilibrium MC	Service condition
30%	6.0%	Heated garage, dry winter
40%	7.4%	Dry continental winter
50%	9.1%	Temperate interior
65%	12.0%	Standard reference condition
80%	15.4%	Humid coastal summer
90%	18.5%	Unventilated coastal garage

A door built and finished at 12 percent MC and then moved to an 8-to-18 percent cycle sees a 10-point swing. That is the number the table below is built on.

Movement per species over a 10-point MC swing

Species	Tangential shrinkage green to 0%	T / R ratio	Movement per metre	500 mm panel	2134 mm door width
Western red cedar	5.0%	2.08x	1.79 mm/m	8.9 mm	38.1 mm
Ponderosa pine	6.2%	1.59x	2.21 mm/m	11.1 mm	47.3 mm
Douglas fir	7.5%	1.56x	2.68 mm/m	13.4 mm	57.2 mm
Meranti (light red)	6.2%	2.07x	2.21 mm/m	11.1 mm	47.3 mm
Sapele	7.5%	1.70x	2.68 mm/m	13.4 mm	57.2 mm
Iroko	5.4%	1.64x	1.93 mm/m	9.6 mm	41.2 mm
Teak	5.8%	2.00x	2.07 mm/m	10.4 mm	44.2 mm
Red oak	8.6%	1.95x	3.07 mm/m	15.4 mm	65.5 mm
White oak	8.8%	1.57x	3.14 mm/m	15.7 mm	67.1 mm
Sugar maple	9.9%	2.06x	3.54 mm/m	17.7 mm	75.5 mm
Accoya (acetylated)	1.6%	1.78x	0.57 mm/m	2.9 mm	12.2 mm

Read the 500 mm panel column first. A 15.4 mm movement on a 500 mm panel is not a dimensional tolerance, it is an open joint. Paint films crack at roughly 0.5 mm substrate movement, so red oak and maple fail cosmetically long before they fail structurally.

What the movement actually does to a sectional door

Panel binding in the track. Sections are sized to run in a 50-60 mm track channel with 3-5 mm clearance. A 10-15 mm width change takes up that clearance completely.
Section joint opening. The tongue-and-groove joint between sections has 8-12 mm of engagement. Tangential movement of the top rail pulls the joint toward disengagement.
Racking of the bottom section. The bottom section carries the full door weight plus the bottom seal. Once it cups, the seal lifts off an uneven slab and water enters.
Finish failure. Coatings do not stretch. Varnish over a substrate moving 3 percent cracks, then water enters through the cracks, then the movement accelerates.
Spring rebalance. As moisture is absorbed the door gains mass, the balance point moves, and the opener works harder. This is the failure most often misdiagnosed as an “opener problem”.

Acetylated wood is the one timber that changes this picture: at 2.9 mm movement on a 500 mm panel it behaves closer to aluminium than to oak, at roughly 1.6 percent tangential shrinkage. It costs more than cedar and still needs a coating, but it removes the dimensional argument.

Garage Door Panels: Section Build-Up and Skin Gauge

A sectional garage door is a stack of horizontal panels hinged together, running in vertical track and transferring to horizontal track through a radius. The panel is a sandwich: two skins bonded to a foamed core. Everything about wind performance, thermal performance and weight follows from that build-up.

Standard section stack

Layer	Material / grade	Thickness	Function
Outer skin	AA3003-H14 or AA3105-H24, Rm 150 MPa	0.50 / 0.60 / 0.80 mm	Finish substrate, bending flange
Adhesive / primer	Two-component PU or epoxy primer	5-8 µm	Bond to core
Core	PU foam 38-45 kg/m³, k = 0.022-0.026 W/mK	40 / 50 / 60 mm	Shear transfer, thermal resistance
Inner skin	AA3003-H14, embossed or stucco	0.50 / 0.60 mm	Interior face, bending flange
Stile / end cap	Aluminium extrusion 6063-T6 or galvanised steel	1.5-2.0 mm	Hinge and roller load path
Interlock	Roll-formed top and bottom profile	0.6-0.8 mm	Section-to-section seal and load transfer

Skin gauge: where the money goes

Skin gauge	Panel mass	Dent resistance	Oil-canning risk	Cost index
0.40 mm	-9%	Fails a 25 mm ball drop at 1 m	Visible on wide panels	0.88
0.50 mm	baseline	Passes at 1 m, marginal at 1.5 m	None below 2.4 m width	1.00
0.60 mm	+12%	Passes at 1.5 m	None below 5.5 m width	1.11
0.80 mm	+28%	Passes at 2 m	None	1.34

Oil-canning is the visible waviness across a wide flat panel caused by thermal movement and residual roll-forming stress. It is the main reason 16 ft and 18 ft doors are specified at 0.60 mm rather than 0.50 mm, and why the skin gauge is worth specifying explicitly rather than accepting a default.

Panel joint and finger protection

Section joints are a roll-formed tongue-and-groove with 8-12 mm engagement and an integrated bulb seal; the seal is what delivers EN 12426 air permeability class.
Finger-protect joints close the gap on the inside face to below 8 mm so a hand cannot be trapped between sections as the door articulates – a requirement under EN 12604 and a standard expectation on residential doors in the EU and Australia.
Thermal-break joints insert a polyamide strip between section interlocks. Worth roughly 0.18 W/m²K on the whole-door Ud figure at 16×7, and the cheapest Ud lever available.

For the panel engineering behind insulated configurations, see insulated garage door panels and 16×7 specifications, and for glazed section inserts see frameless glass garage door panels.

Modern Garage Door: Woodgrain Finish and Profile Library

The modern garage door trend has moved almost entirely to timber-look finishes on metal substrates. The reason is practical: the look buyers want is a warm horizontal grain, and the substrate that holds that look for 10 years without maintenance is coated aluminium, not timber.

Profile library

Profile	Section layout	Typical opening	Woodgrain direction
Flush / micro-rib	Flat face, 12 mm shadow line every 100 mm	8×7, 9×7	Horizontal
Wide rib	Three horizontal grooves per 533 mm section	16×7, 18×7	Horizontal
V-groove plank	Shiplap plank relief, 150 mm spacing	16×7, 18×8	Horizontal
Carriage-house overlay	Applied battens + decorative hardware	16×7, 18×8	Mixed
Full-view with timber-look frame	Glazing inserts in 3 of 4 sections	16×7	Frame only

Woodgrain pattern repeat and section continuity

The woodgrain film has a physical repeat, typically 800-1,200 mm. On a 4.88 m wide door the pattern repeats 4-6 times across the width. This is not visible and is not a defect. What is visible is a pattern discontinuity between sections: if the film is not indexed per section, the grain line jumps at every horizontal joint.

Specify per-section grain indexing: each section is cut from the same position in the film repeat, so grain lines continue across the joint.
Specify grain direction consistency between the door and any adjacent entry door – see aluminium entrance door specifications for matching finishes.
On carriage-house overlays, specify that the battens are the same alloy as the panel. Mixed metal battens create a galvanic couple at every fixing.

Colour and gloss

Woodgrain finishes are normally 25-35 gloss units measured at 60°. Higher gloss shows panel waviness; lower gloss reads as flat and plastic.
Walnut, oak, teak, iroko and weathered grey are the five patterns that cover roughly 80 percent of residential orders.
Custom patterns need a scanned sample and a 300 m minimum film run, typically a 15-25 day adder on first order.

Matching timber-look finishes across a project – garage door, front door and gates – is the most common reason buyers consolidate suppliers. See aluminium driveway gate specifications and front entry doors for the same finish system on other products.

Aluminium Garage Door vs Solid Timber: 12-Point Data

The comparison that matters is not appearance. Both options can be made to look like timber. The comparison that decides the specification is mass, movement and the 10-year cost of keeping the door operating.

Measured comparison, 16×7 opening

Parameter	Woodgrain aluminium 50 mm PU	Solid cedar, stile-and-rail	Solid red oak 35 mm
Door mass	181 kg	243 kg	444 kg
Movement over 10-point MC swing	0 (thermal only)	8.9 mm / 2.13 m	15.4 mm / 2.13 m
Panel U-value	0.44 W/m²K	0.32 W/m²K	0.22 W/m²K
Whole-door Ud	0.71 W/m²K	0.95 W/m²K (joint loss)	0.85 W/m²K (joint loss)
Air permeability, EN 12426	Class 3-4	Class 1-2 after 24 months	Class 1-2 after 24 months
Spring torque per spring	45 N·m	60 N·m	110 N·m
Opener class	3/4 HP / 800 N	1 HP / 1000 N	1-1/4 HP / 1400 N
Refinish interval	none	2-3 yr	3 yr
10-year maintenance	USD 250	USD 780-900	USD 780
Doors per 40 ft HQ	54	28	28
US HTS heading	7616.99 – aluminium articles	4418.20 – wood doors	4418.20 – wood doors
Duty exposure	Verify AD/CVD scope	Usually outside aluminium scope	Usually outside aluminium scope

Where solid timber still wins

Heritage and conservation overlay districts where a planning consent requires the actual material. No finish replicates that on a documented basis.
Repairability: a damaged oak stile can be replaced by a local joiner. A damaged sandwich panel is a factory part.
Acoustic mass: at 27.5 kg/m² an oak door is a better low-frequency barrier than a 9.8 kg/m² sandwich panel. Relevant only if the garage is a workshop or studio; not relevant if it stores cars.
Duty scope: aluminium extrusions from China are covered by AD/CVD orders that wood doors are not. On some projects this is the deciding factor.

Where woodgrain aluminium wins

Any climate with a wide humidity swing, or any coastal site. Salt-laden air plus a moving substrate plus a cracked coating is the failure sequence that ends a timber door.
Any project where the door is operated more than 4 times a day. Mass drives spring cycle consumption and opener wear.
Any project shipped in volume. 54 doors per container versus 28 halves the freight per unit.
Any project where the buyer cannot fund a refinish cycle every 2-3 years.

The thermal figures are the counter-intuitive part. Solid timber has a better panel U-value than a 40 mm PU sandwich – 0.32 versus 0.54 W/m²K – because timber is a reasonable insulator. Timber loses on whole-door Ud because the joints and the perimeter frame leak. Insulation is not the differentiator; airtightness is.

If the project brief is metal rather than timber-look, the steel vs aluminium door comparison and wholesale aluminium garage door compliance pages carry the corresponding data.

8×7 Garage Door and 16×7: Size Matrix and Wind Strut Requirements

US garage door sizes are quoted in feet and inches; the factory works in millimetres. The gap between the two is where most ordering errors happen. Nominal “8×7” is 2,438 mm wide by 2,134 mm high; nominal “16×7” is 4,877 mm by 2,134 mm. The door is built to the nominal size, not to the rough opening, so the opening has to be surveyed first.

Size matrix

Nominal size	Width mm	Height mm	Door area m²	Sections	Section height mm
8×7	2,438	2,134	5.20	4	533
9×7	2,743	2,134	5.85	4	533
16×7	4,877	2,134	14.86	4	533
18×7	5,486	2,134	16.71	4	533
18×8	5,486	2,438	16.07	5	488
Metric 2,500 x 2,125	2,500	2,125	5.31	4	531

Strut requirement by door width and design pressure

Wind struts – the horizontal reinforcement sections bonded or riveted to the inside face of each panel – carry essentially all the bending stiffness of a wide door. Sizing uses two criteria: bending stress at or below 155 MPa for 6063-T6 with a partial factor of 1.10, and mid-span deflection at or below L/120. The panel itself contributes the skin bending stiffness plus an allowance for the roll-formed interlock and stiles; the calculation is deliberately conservative.

Door size	500 Pa	750 Pa	1000 Pa	1500 Pa	2000 Pa
8×7	1xT1 / 5 kg	1xT1 / 5 kg	1xT1 / 5 kg	1xT1 / 5 kg	1xT1 / 5 kg
9×7	1xT1 / 6 kg	1xT1 / 6 kg	1xT1 / 6 kg	1xT1 / 6 kg	1xT1 / 6 kg
16×7	1xT4 / 24 kg	1xT5 / 38 kg	1xT5 / 38 kg	1xT6 / 55 kg	2xT6 / 110 kg
18×8	1xT5 / 54 kg	1xT5 / 54 kg	1xT6 / 77 kg	2xT6 / 155 kg	2xT6 / 155 kg

Strut profiles

Profile	Section b x h x t mm	I mm⁴	W mm³	kg/m
T1	25 x 40 x 1.5	40,470	2,023	0.50
T2	30 x 50 x 1.8	92,726	3,709	0.74
T3	40 x 60 x 2.0	193,152	6,438	1.04
T4	40 x 80 x 2.0	389,739	9,743	1.25
T5	50 x 100 x 2.5	951,510	19,030	1.96
T6	60 x 120 x 3.0	1,973,052	32,884	2.82

The strut package is cheap – typically 4 to 9 percent of FOB – but it is heavy. Going from a 0.5 kPa package to a 1.5 kPa package on a 16×7 door adds about 30 kg of aluminium, which is what pushes the door from a 3/4 HP opener into a 1-1/4 HP opener and a higher spring cycle class. Specify the strut package and the opener in the same purchase order or the second one arrives wrong.

Clearances that get missed

Headroom: door height plus 300-450 mm for the horizontal track and opener rail. A 2,134 mm door needs 2,450-2,580 mm of clear height above the finished floor.
Backroom: door height plus 900-1,200 mm for the horizontal track run.
Side room: 100-150 mm each side for the vertical track and bracket.
Slab flatness: the bottom seal needs a slab level to within 3 mm over the door width. Otherwise specify a flexible bottom seal and accept a 10-15 mm gap tolerance.

Thermal Performance: Ud, Condensation and Air Leakage

Garage doors are tested to EN 12428 for thermal transmittance and EN 12426 for air permeability when they are CE marked under EN 13241. In the US the equivalent figure is an R-value quoted for the door assembly. Both numbers are whole-door figures, not panel figures, and the difference between them is the perimeter.

Panel U-value by core

Panel build-up	Core thickness	Lambda W/mK	Panel Up W/m²K
Single skin Al 0.8 mm, no core	–	0.024	6.50
EPS core 40 mm	40 mm	0.038	0.82
PU core 40 mm	40 mm	0.024	0.54
PU core 50 mm	50 mm	0.024	0.44
PU core 50 mm, low-k 0.022	50 mm	0.022	0.41
PU core 60 mm	60 mm	0.024	0.38
Solid cedar 35 mm	35 mm	0.110	2.05
Solid red oak 35 mm	35 mm	0.160	2.57

Whole-door Ud, 16×7 reference

Panel	Up	Frame type	Uf W/m²K	Joint psi W/mK	Whole-door Ud W/m²K
Single skin Al 0.8 mm, no core	6.50	No thermal break frame	5.0	0.28	6.634
Single skin Al 0.8 mm, no core	6.50	Thermal break frame	2.2	0.10	6.193
EPS core 40 mm	0.82	No thermal break frame	5.0	0.28	1.488
EPS core 40 mm	0.82	Thermal break frame	2.2	0.10	1.047
PU core 40 mm	0.54	No thermal break frame	5.0	0.28	1.240
PU core 40 mm	0.54	Thermal break frame	2.2	0.10	0.799
PU core 50 mm	0.44	No thermal break frame	5.0	0.28	1.150
PU core 50 mm	0.44	Thermal break frame	2.2	0.10	0.708
PU core 50 mm, low-k 0.022	0.41	No thermal break frame	5.0	0.28	1.118
PU core 50 mm, low-k 0.022	0.41	Thermal break frame	2.2	0.10	0.676
PU core 60 mm	0.38	No thermal break frame	5.0	0.28	1.087
PU core 60 mm	0.38	Thermal break frame	2.2	0.10	0.646
Solid cedar 35 mm	2.05	No thermal break frame	5.0	0.28	2.602
Solid cedar 35 mm	2.05	Thermal break frame	2.2	0.10	2.161
Solid red oak 35 mm	2.57	No thermal break frame	5.0	0.28	3.077
Solid red oak 35 mm	2.57	Thermal break frame	2.2	0.10	2.635

Reading the table: moving from a 40 mm PU core to a 50 mm core improves the whole-door Ud from 0.799 to 0.708 W/m²K – about 0.09. Adding a thermal break frame instead improves it from 1.240 to 0.799 – about 0.44. The frame and the joints are five times more effective than the core thickness. Specifying a thicker core and skipping the thermal break is the most common thermal specification error on garage doors.

Air leakage: the number that dominates

A 1 mm continuous gap around the full perimeter of a 16×7 door is 0.0140 m² of open area. At a 10 Pa pressure difference that is 124 m³/h of air – 5.0 air changes per hour in a 2.4 m deep garage, or 8.3 m³/h per m² of door area. No amount of extra foam compensates for that.

EN 12426 class	Permeability at 50 Pa, m³/m²h	What it means on site
Class 0	not determined	No data declared – reject
Class 1	24	Unsealed door, gaps visible
Class 2	12	Basic seal package
Class 3	6	Standard residential specification
Class 4	3	Thermal break + brush seals
Class 5	1.5	High-performance residential / heated workshop

Condensation check

A heated garage in a cold climate puts the interior of the door below the dew point at the frame. The check is the temperature factor fRsi: (Tsi – Te) / (Ti – Te). At 20 °C indoor, -5 °C outdoor, a frame without a thermal break reaches fRsi of roughly 0.45-0.55 and condenses; a thermal break frame reaches 0.70-0.78 and stays dry. The usual acceptance threshold is fRsi at or above 0.65 for occupied or heated spaces.

Garage Door Opener: Weight, Spring Torque and Cycle Life

The opener does not lift the door. The torsion springs do. The opener handles the residual imbalance, friction and acceleration – roughly 8 to 12 percent of door weight once the springs are set correctly. That is why door mass, not door size, determines opener class, and why a heavier door consumes both springs and openers faster.

Sizing by door mass, 16×7

Door configuration	Mass	Torque per spring	Opener class	Rated force	Utilisation at 10% imbalance
Single-skin aluminium 0.8 mm, uninsulated	117 kg	29 N·m	1/2 HP AC chain	600 N	19%
40 mm PU sandwich, woodgrain	161 kg	40 N·m	3/4 HP AC / 800 N DC	800 N	20%
50 mm PU sandwich, woodgrain, thermal break	181 kg	45 N·m	3/4 HP AC / 800 N DC	800 N	22%
W3 + 1.0 kPa wind strut package	219 kg	54 N·m	1 HP AC / 1000 N DC	1000 N	21%
W3 + glazing inserts (top section)	193 kg	48 N·m	3/4 HP AC / 800 N DC	800 N	24%
Carriage-house overlay, woodgrain	204 kg	51 N·m	1 HP AC / 1000 N DC	1000 N	20%
Cedar 22 mm stile-and-rail	243 kg	60 N·m	1 HP AC / 1000 N DC	1000 N	24%
Oak 35 mm solid	444 kg	110 N·m	1-1/4 HP / 1200-1500 N DC	1400 N	31%
Accoya 35 mm solid	325 kg	81 N·m	1-1/4 HP / 1200-1500 N DC	1400 N	23%

Utilisation above roughly 40 percent means the opener has no margin for a spring that has drifted out of balance. A 444 kg oak door at 31 percent is already at the top of the residential opener range; anything heavier needs a jackshaft opener mounted on the torsion shaft rather than a rail-mounted unit.

Spring cycle life

Rated cycles	Typical spring spec	Years at 4 cycles/day	Cost adder per door
10,000	1.75 in / 0.148 in wire, 4 in ID	6.8 yr	included
15,000	2.00 in / 0.162 in wire, 4 in ID	10.3 yr	USD 18
25,000	2.25 in / 0.177 in wire, 4 in ID	17.1 yr	USD 42
50,000	2.50 in / 0.192 in wire, 4 in ID	34.2 yr	USD 88
100,000	3.00 in / 0.207 in wire, 4 in ID	68.5 yr	USD 165

At four open-close cycles per day a residential door accumulates 1,460 cycles a year. A 10,000-cycle spring is a 6.8-year consumable; a 25,000-cycle spring is a 17-year one. The cost difference is USD 42 per door. On a 24-unit development that is USD 1,008 to defer the first spring replacement by a decade, and it avoids the call-out entirely.

Safety and regulatory requirements

UL 325 – the US safety standard for door operators. Requires a primary entrapment protection device, reversal within 2 seconds of contact, and a secondary device (photoelectric eyes or an edge sensor).
California battery backup – since July 2019 a garage door opener installed in California must have a battery backup. DC openers with an integrated battery satisfy this; AC openers with an add-on pack generally do not.
EN 12453 force limits – 400 N sustained force, 1,400 N peak dynamic force, 150 N residual after reversal, tested to EN 12445. This is the EU equivalent requirement and it applies to powered garage doors CE marked under EN 13241.
Manual release – every powered residential door needs a release that works without power and without tools.

For the opener and control specification used on our aluminium door range, see aluminium garage door panels and opener specifications.

Certification: CE, EN 13241, Miami-Dade NOA and UL 325

Garage doors are one of the few building products with a mandatory harmonised European standard. Any door placed on the EU market carries a DoP and a CE mark under Regulation (EU) 305/2011. In the US the requirement is different: there is no federal product standard for the door itself, but wind-borne debris regions and the operator are regulated separately.

EN 13241 test package

Test	Standard	What is measured	Typical declared result
Wind load	EN 12424 / EN 12444	Classification by pressure, Pa	Class by DoP – ask for the pressure
Air permeability	EN 12426	m³/m²h at 50 Pa	Class 3 to 4
Water tightness	EN 12425 / EN 12489	Classification 0-6	Class 2 to 3
Thermal transmittance	EN 12428	Ud, W/m²K	0.71 to 1.24
Safe opening	EN 12453 / EN 12445	Force limits, reversal	Pass with force monitoring
Mechanical behaviour	EN 12604	Cycles, wind suction	10,000 to 25,000 cycles
Reaction to fire	EN 13501-1	Euroclass	Class E – organic core

EN 12424 assigns a wind load class; the class-to-pressure mapping is defined in the current edition of the standard and has changed between editions. Do not accept a class number on its own. Ask for the declared pressure in Pa or kPa on the DoP, then compare that number to the design pressure from EN 1991-1-4 or ASCE 7 for the site. A class number without a pressure is not a specification.

Miami-Dade NOA – the scope trap

A NOA (Notice of Acceptance) is issued for a specific assembly: panel profile, section count, strut package, track gauge, anchor type and spacing, and opening size. Change any one of those and the NOA no longer covers the door.
NOA scope is commonly limited to a maximum width. A NOA valid to 4,877 mm does not cover a 5,486 mm door even with the same panel.
The test sequence is TAS 201 (large missile impact), TAS 202 (cyclic wind pressure) and TAS 203 (uniform static pressure), plus ASTM E330 for the assembly.
Ask for the NOA number and read the limitations section before ordering. A supplier quoting “NOA approved” without a number is quoting marketing.

Hurricane-rated transparent configurations are covered in frameless glass garage door impact glazing; structural glazing thresholds and deflection rules for large openings are in sliding glass door specifications.

Market-specific marks

Market	Scheme	Applies to	Note
EU / UK	CE under EN 13241 / UKCA	Whole door	DoP mandatory, AVCP system 3
USA, HVHZ	Miami-Dade NOA / Florida Product Approval	Whole assembly	Scope-limited
USA, general	UL 325 + local building code	Operator	Door body follows ASCE 7 loads
Australia	AS/NZS 4505 + AS 4055 wind class	Whole door	N1 to C4 wind classification
Canada	CSA / provincial code	Whole door	U-factor for heated garages
Saudi / Gulf	SASO / G-mark	Whole door	Requires local importer registration

Woodgrain Transfer: Process Parameters and Standard Boundaries

Woodgrain on aluminium is not paint and it is not a laminate wrap. It is a sublimation transfer: a printed PET film is held against a powder-coated surface under vacuum and heat, and the dye sublimates from the film and diffuses into the coating. The image ends up inside the top few microns of the film, not sitting on top of it.

Process window

Step	Parameter	Typical value	Failure if out of window
Substrate clean	Chrome-free pretreatment	Zr/Ti conversion, 30-60 s	Adhesion loss, filiform corrosion
Base powder coat	Polyester or polyurethane	60-80 µm DFT	Thin film = burn-through on transfer
Gel / cure	Metal temperature	180-200 °C, 10-20 min	Under-cure = poor dye uptake
Film application	Vacuum	0.08-0.10 MPa	Low vacuum = pattern voids
Transfer	Temperature / dwell	180-200 °C, 90-180 s	Short dwell = pale, patchy grain
Dye diffusion depth	Into coating	5-15 µm	Shallow = abrasion removes the pattern
Cooling	Air or water quench	to below 60 °C	Hot peel = film residue
Clear topcoat (optional)	PU or acrylic	15-25 µm	Not required for most patterns

The PVDF boundary

AAMA 2605 is the highest-performance architectural powder specification, and it is largely incompatible with sublimation woodgrain. PVDF-based coatings do not take up sublimation dye. In practice woodgrain finishes are produced on polyester or polyurethane powder and are specified to AAMA 2604 or Qualicoat Class 1-2. If a supplier offers “AAMA 2605 woodgrain”, ask for the coating certificate and the transfer method – the usual answer is a laminate film, which has different weathering behaviour entirely.

Weathering data to request

ISO 16474-2 xenon-arc exposure, 1,000 h, with Delta E reported to ISO 105-A02 grey scale. Expect Delta E at or below 2 for Class 2 and at or below 3 for Class 1.
ISO 2810 natural weathering with the exposure site named. Florida exposure is the conventional benchmark; a European site is not equivalent for UV dose.
Gloss retention at 60° after 1,000 h: 50 percent minimum for Class 2.
ISO 9227 neutral salt spray on the scribe, 1,000 h, with creep reported in mm. Woodgrain transfer does not change the corrosion performance of the base coating – the pretreatment does.

The same coating system is used across the product range, so a woodgrain garage door can be finished to match aluminium entrance doors, aluminium French doors and aluminium window frames from one production run.

Production Steps and Lead Time

A made-to-measure woodgrain garage door runs through twelve operations. The single largest block of elapsed time is not manufacturing – it is the buyer drawing approval loop, which is also the one thing a buyer can compress.

Twelve steps with elapsed time

#	Operation	Days	Share of lead time	Compressible
1	Order entry, size and option confirmation	1	3%	No
2	Shop drawings issued and approved by buyer	5-9	17-30%	Yes – sign in 48 h
3	Coil, extrusion and hardware procurement	2	7%	Stocked grades only
4	Roll-forming of skins	1	3%	No
5	Foam injection and lamination	1	3%	No
6	Panel curing	0.5	2%	No
7	Cut to length, end caps, interlock	0.5	2%	No
8	Powder coat and woodgrain transfer	1.5	5%	No
9	Hardware kitting and opener prep	1	3%	No
10	Pre-assembly check-build	0.5	2%	No
11	Packing, KD flat-pack	0.5	2%	No
12	Container loading	0.5	2%	No

Total is roughly 25-35 calendar days from order to vessel, of which 17-30 percent is the drawing approval loop. Signing off drawings within 48 hours takes about a week off the schedule and costs nothing. Repeating an existing size takes the drawing step out entirely.

Tolerance and QC gates

Panel thickness: ±0.5 mm on 40-60 mm cores. Below that the interlock does not seat.
Panel width: -0 / +1.5 mm. Oversize panels bind in the track; undersize panels rack.
Woodgrain Delta E within a batch: at or below 1.5 against the master panel. Across batches, at or below 2.5. Panels with visible colour difference are rejected before packing.
Adhesion: cross-hatch to ISO 2409, Class 0 required on every production batch.
Check-build: one door per size per order is assembled, cycled 5 times, then stripped and packed. This is what catches track geometry errors before they reach site.

FOB Price Matrix and Option Adders

Prices below are FOB Shenzhen or Foshan, per square metre of door area, for woodgrain aluminium sectional doors with standard track and hardware. They exclude the opener, which is quoted separately because it is usually sourced locally for warranty reasons.

FOB per square metre by configuration and quantity

Configuration	1-4 doors	5-19	20-49	50+	8×7 door at 20-49	16×7 door at 20-49
W1 Single skin 0.8 mm, no core	65	58	52	47	270	773
W2 40 mm PU, woodgrain	98	89	81	74	421	1,204
W3 50 mm PU, woodgrain, thermal break	132	121	112	104	582	1,664
W4 W3 + 1.0 kPa wind strut package	168	154	143	133	744	2,125
W5 W3 + glazing inserts, top section	205	188	175	162	910	2,601
W6 Carriage-house overlay, woodgrain	176	161	150	139	780	2,229

All figures USD. 8×7 = 5.20 m², 16×7 = 14.86 m². Solid timber equivalents run USD 155-280 per m² depending on species, and carry a species surcharge that moves with timber availability.

Option adders

Option	Adder	Unit	Comment
Thermal break frame and joints	14-19	USD/m²	Highest-value thermal option
Wind strut package 0.5 to 1.0 kPa	18-26	USD/m²	Sized per section 6 of this article
Wind strut package 1.0 to 1.5 kPa	34-48	USD/m²	Adds about 30 kg per 16×7 door
Finger-protect joints	6-9	USD/m²	Standard on EU and AU residential
Full-view glazing insert, per section	58-84	USD/m²	See glass garage door page
Impact glazing per TAS 201	95-140	USD/m²	HVHZ only, NOA-scoped
Carriage-house overlay battens	22-31	USD/m²	Same alloy as panel, not mixed metal
Spring upgrade to 25,000 cycles	42	USD/door	17 years at 4 cycles/day
Spring upgrade to 50,000 cycles	88	USD/door	Commercial or high-use
Battery-backup DC opener	185-320	USD/door	Mandatory in California since 2019
Jackshaft opener, wall mounted	410-680	USD/door	Doors above 450 kg, or low headroom
Perimeter brush and header seal	28-45	USD/door	Needed for EN 12426 class 4
Custom woodgrain pattern	1,200-2,400	first order	300 m minimum film run
Colour-matched powder to RAL	0	–	Standard service, no adder
Assembled rather than KD packing	95-140	USD/door	Triples shipping volume – see section 13
Third-party inspection	350-600	per visit	Buyer-nominated inspector

Payment and commercial terms

MOQ: 1 door for standard sizes, 20 doors for a custom profile or custom pattern.
Payment: 30 percent deposit with order, 70 percent against copy of bill of lading. Irrevocable LC at sight accepted for orders above USD 30,000.
Price validity: 30 days from quotation. Aluminium ingot moves; quotes beyond 30 days are re-priced against the LME cash settlement at the date of order.
Warranty: 10 years on the coating, 5 years on the panel bond, 2 years on hardware and openers supplied with the door.

Container Loading, Duty Exposure and Landed Cost

Garage doors are bulky and light, so volume – not payload – is almost always the limiting factor in a container. The exception is solid timber, which is both bulky and heavy.

Loading per 40 ft high-cube, 16×7 doors

Packing method	Volume per door	Mass per door	Doors per 40HQ	Limiting factor	Container payload	Ocean freight per door
Woodgrain aluminium, KD flat-pack	1.25 m³	155 kg	54	volume	8,432	USD 70
Woodgrain aluminium, assembled	3.10 m³	155 kg	21	volume	3,399	USD 173
Solid timber, crated	2.40 m³	420 kg	28	volume	11,900	USD 134

Flat-pack woodgrain aluminium ships 54 doors per container against 28 for crated solid timber – nearly 2x. At USD 3,800 ocean freight that is USD 70 per door against USD 134. On a 24-door order the difference is USD 1,536, and it arrives before any duty is applied.

Duty exposure

Scenario, 16×7 W3 at USD 112/m²	Duty rate	FOB	Freight	Duty	Inland + install	Landed and installed
Aluminium, duty 0%	0%	USD 1664	USD 70	USD 0	USD 420	USD 2159
Aluminium, duty 2.5% (HTS 7616)	2%	USD 1664	USD 70	USD 43	USD 420	USD 2203
Aluminium, 25% (232 + AD/CVD scenario)	25%	USD 1664	USD 70	USD 435	USD 420	USD 2594
Solid timber, duty 0% (HTS 4418)	0%	USD 1664	USD 70	USD 0	USD 420	USD 2159
Solid timber, duty 3.2%	3%	USD 1664	USD 70	USD 56	USD 420	USD 2215

Aluminium garage doors are normally classified under HTS 7616.99 as other articles of aluminium. Solid timber doors fall under HTS 4418.20. Aluminium extrusions from China are covered by AD/CVD orders and finished-goods scope rulings change – verify current scope and rates with a licensed customs broker before contracting. Wood doors sit outside that scope, which is a material reason some US buyers still specify timber despite the maintenance.

Landed comparison against a local quote

A 16×7 woodgrain aluminium door at the 20-49 tier lands and installs at USD 2203 including ocean freight, insurance, 2.5 percent duty, inland delivery and installation. A locally quoted installed cedar door on the same project was USD 3150. That is USD 947 per door, 30.1 percent, on a 24-door development: USD 22,728.

Ten-year ownership moves the number further. See section 16 for the maintenance comparison, and supplier evaluation criteria for how to structure the comparison across vendors.

Installation: Eight Steps and the Failure Points

Most garage door warranty claims are installation claims. The door leaves the factory correct; the failure is in the survey, the spring setting or the anchor.

Eight steps

Survey the opening. Measure width at three heights, check the slab for level across the full width, confirm headroom and backroom, and check that the jambs are plumb and structural. Record the numbers – they are the evidence if anything is disputed later.
Prepare the opening. Fit timber or steel jambs, seal the head with a flashing that laps over the door header, and apply a continuous bead of sealant behind the stop.
Assemble and plumb the vertical track. Track must be vertical to within 2 mm over the full height and parallel across the opening. Set the track on packers, not on the masonry face.
Stack the sections bottom-up. Fit hinges and rollers as each section goes in. Bottom section first, bottom seal attached before the section is set.
Install the torsion assembly. Set the shaft, drums and springs. Torque to the calculated value for the actual door mass – not to a rule of thumb.
Run cables and set tension. Cables seated in the drum groove with equal tension both sides. Unequal tension is the cause of the door rising crooked.
Mount the opener and set travel. Rail supported from the structure, not from the door. Set open and close limits, then set force – force is set by testing, not by turning a screw to a marked position.
Balance test and safety test. Disconnect the opener, lift the door manually to half height and let go. It should stay. Then test reversal with a 50 mm obstruction at floor level and at 1.5 m.

Five failure points

Failure	Cause	Symptom	Fix
Springs not recalculated	Woodgrain sandwich panels are 40-60 percent heavier than single-skin; installer uses a default spring	Door drifts down, opener strains, cables jump the drum	Re-torque to measured door mass
Headroom or backroom short	Track radius not matched to available space	Top section jams at the radius, rollers crack	Low-headroom track kit or jackshaft opener
Anchors into weak masonry	No sleeve or wrong embedment	Pull-out under wind uplift – the wind failure mode, not a gravity one	Chemical anchor with 80 mm embedment, verified pull-out test
Bottom seal not seated	Slab out of level by more than 3 mm	Water and rodent ingress, draught, EN 12426 class drops	Flexible seal plus a slab levelling strip
Woodgrain pattern discontinuity	Film not indexed per section	Grain line jumps at every horizontal joint	Factory-side fix only – reject before installation

Wind anchors fail in uplift, not in shear, and the load path is the jamb fixings. In a 1.5 kPa region a 16×7 door sees roughly 22 kN of net uplift. Spread across 10 anchors that is 2.2 kN each – comfortable for a chemical anchor in sound masonry, marginal for a plastic plug in a hollow block.

Project Case Studies

Case 1 – 24-unit development, Minnesota, USA

Climate: continental, design winter -29 °C, summer 30 °C at 75 percent RH. The original specification was solid cedar for appearance. The builder switched to woodgrain aluminium after the dimensional analysis in section 2.

Item	Woodgrain aluminium, as built	Solid cedar, as quoted
Specification	W3, 50 mm PU, walnut woodgrain, thermal break	Cedar stile-and-rail, 22 mm
Door size	16×7, 14.86 m²	16×7, 14.86 m²
Quantity	24	24
Door mass	181 kg	243 kg
Whole-door Ud	0.71 W/m²K	0.95 W/m²K
Opener	3/4 HP DC with battery backup	1 HP AC
FOB per door	USD 1,664	USD 2,586
Landed and installed per door	USD 2,203	USD 3,150 (local supply)
Project total	USD 52,872	USD 75,600
10-year maintenance, 24 doors	USD 6,000	USD 18,720
10-year total	USD 58,872	USD 94,320

Saving at handover: USD 22,728, or 30.1 percent. Over ten years including maintenance: USD 35,448. The builder also removed the requirement to refinish 24 doors every three years, which was the clause the developer objected to in the original budget.

Case 2 – 12 townhouses, Gold Coast, Queensland, Australia

Climate: subtropical coastal, salt-laden air, wind classification to AS 4055 with 1.1 kPa design pressure. Single-width doors, 8×7.

Item	Value
Specification	W4, 50 mm PU, weathered-grey woodgrain, 1.1 kPa strut package
Door size	8×7, 5.20 m²
Quantity	12
Strut package	1xT1 per section, 4 sections per door
Door mass	77 kg panel + 35 kg hardware + struts
Coating	Polyester woodgrain, Qualicoat Class 2, ISO 9227 salt spray 1,000 h
FOB per door	USD 800
Shipping, 12 doors consolidated	USD 210 per door
Duty and GST	As assessed at entry, 5 percent duty band
Installed per door	USD 1,340
Local comparison quote	USD 2,180 per door installed
Project saving	USD 10,080

The deciding factor was not price. A solid timber door on a coastal site within 200 m of surf needs recoating every 18-24 months, and 12 owners in a body corporate will not maintain them on the same schedule. Woodgrain aluminium removed the maintenance obligation from the body corporate budget entirely.

Case 3 – 6 villa garages, Gulf region

Design condition: 45 °C ambient, high solar gain on a west-facing elevation, doors 18×8. Section count raised to 5 to reduce section height and the strut size. Specified with a light-reflectance woodgrain pattern – a pale oak rather than a dark walnut – to limit skin temperature. Dark woodgrain finishes on 18×8 west-facing doors reach 75-80 °C surface temperature in summer sun, which is above the threshold where PU cores begin to out-gas and the panel can delaminate at the bond line.

Selection Guide and 10-Year Maintenance Cost

Ten-year maintenance, per 16×7 door

Finish	Recoat interval	Cost per event	Events in 10 yr	10-year total
Solid cedar / oak, exterior varnish	3 yr	USD 260	3	USD 780
Solid cedar, penetrating oil	2 yr	USD 180	5	USD 900
Accoya + factory coating	6 yr	USD 300	1	USD 300
Woodgrain aluminium (PU powder)	none	USD 0	1	USD 250
Woodgrain aluminium (polyester, Class 1)	8 yr	USD 120	1	USD 370

The timber numbers assume the work is actually done. In practice a recoat is deferred, the coating fails, and the repair becomes a partial rebuild – typically 3 to 5 times the recoat cost. The aluminium column assumes two washes a year and nothing else.

Material selection guide

Priority	Choose	Avoid	Reason
Zero maintenance	Woodgrain aluminium, PU powder	Solid cedar or oak	No recoat cycle
Heritage or conservation consent	Solid timber or Accoya	Any metal-look finish	Consent requires the actual material
Coastal, salt-laden site	Woodgrain aluminium, Class 2 coating	Untreated timber	Salt plus movement plus cracked coating
High wind / HVHZ	W4 with NOA-scoped assembly	Any door without an NOA number	Scope-limited, size-limited
Heated workshop or studio	50 mm PU + thermal break	40 mm EPS core	fRsi and condensation, not just Ud
AD/CVD duty exposure	Solid timber under HTS 4418	Aluminium under 7616	Verify scope with a broker first
Remote site, no service network	Woodgrain aluminium + local opener	Factory-supplied opener	Opener warranty service is local
Heavy daily use, 20+ cycles	50,000-cycle springs + DC opener	10,000-cycle springs	Spring replacement is the dominant maintenance cost

Common specification errors

Ordering 16×7 doors at 0.50 mm skin and then reporting oil-canning. Wide doors need 0.60 mm.
Specifying a 60 mm core and skipping the thermal break. The core is worth about 0.09 W/m²K; the break is worth about 0.44.
Quoting an opener by door size instead of door mass. A 181 kg door and a 444 kg door in the same 16×7 opening need different equipment.
Accepting a wind load class number without the pressure in Pa.
Assuming AAMA 2605 woodgrain exists. It mostly does not.
Buying an AC opener for a California installation. Battery backup has been mandatory since July 2019.

RFQ Checklist

Send the eight technical items and the eight commercial items below and a quotation comes back in 24-48 hours without a clarification round.

Technical

Opening dimensions in millimetres, measured at three heights, with headroom and backroom.
Design wind pressure in Pa or kPa, with the code it was derived from and the building height.
Door mass target or the panel build-up you want quoted.
Woodgrain pattern, gloss level and the RAL or sample reference for the base colour.
Thermal requirement: whole-door Ud, or the fRsi target if the garage is heated.
Air permeability class required under EN 12426, or the local equivalent.
Opener specification: AC or DC, battery backup required or not, rated force in N.
Market, so the certification package matches: CE DoP, NOA, AS/NZS 4505, or CSA.

Commercial

Quantity by size, and whether the order will repeat.
Incoterm: FOB Shenzhen, FOB Foshan, CIF or DDP.
Packing: KD flat-pack or assembled.
Target delivery date and whether it is fixed or flexible.
Payment preference: TT with deposit, or LC at sight.
Whether a third-party inspection is required and who nominates it.
Whether the opener is included or sourced locally.
Consolidation: whether this order ships with other products.

Consolidating a garage door order with aluminium sunroom packages, aluminium sliding windows or folding door systems is the cheapest way to move a project from LCL to FCL. See Foshan doors and windows specifications for the consolidation terms used on mixed containers.

Glossary and Standards Index

Terms

Term	Meaning
Fibre saturation point	Moisture content, about 28 percent, above which wood does not change dimension
EMC	Equilibrium moisture content – the moisture content wood stabilises at for a given temperature and humidity
Tangential shrinkage	Dimensional change across the growth rings; 1.8 to 2.5 times the radial figure
Section	One horizontal panel of a sectional door
Strut	Reinforcement profile fixed to the inside face of a section to carry wind load
Ud	Whole-door thermal transmittance, W/m²K, per EN 12428
fRsi	Temperature factor used to assess condensation risk at the internal surface
EN 12426 class	Air permeability class of an industrial or garage door, 0 to 6
NOA	Notice of Acceptance – Miami-Dade approval for a specific door assembly
HVHZ	High Velocity Hurricane Zone – Florida building code designation
Torsion spring	The counterbalance spring on a shaft above the opening; it lifts the door
Cycle	One open-close operation of the door
Headroom	Clear height above the opening needed for the track and opener
Backroom	Clear depth into the garage needed for the horizontal track
Jackshaft opener	Opener mounted on the torsion shaft rather than on a ceiling rail
Sublimation transfer	Heat and vacuum process that diffuses printed dye into a powder coating

Standards index

Standard	Subject
EN 13241	Product standard for industrial, commercial and garage doors
EN 12424 / EN 12444	Wind load classification and test method
EN 12425 / EN 12489	Water tightness classification and test method
EN 12426	Air permeability classification
EN 12428	Thermal transmittance, whole door
EN 12453 / EN 12445	Safe opening, force limits and test method
EN 12604	Mechanical behaviour, cycles
EN 12978	Safety devices for powered doors
EN 13501-1	Reaction to fire, Euroclass
EN ISO 10077-1	Calculation of thermal transmittance of doors
ISO 16474-2	Xenon-arc weathering of coatings
ISO 9227	Neutral salt spray corrosion test
ISO 2409	Cross-hatch adhesion test
AAMA 2604 / 2605	Voluntary specification for architectural coatings
Qualicoat Class 1 / 2	Quality label for architectural powder coatings
TAS 201 / 202 / 203	Florida impact, cyclic pressure and static pressure test protocols
ASTM E330	Structural performance under uniform static air pressure
UL 325	Safety standard for door, gate and window operators
ASCE 7	Minimum design loads, including wind, for US buildings
AS/NZS 4505	Garage doors, Australian and New Zealand standard
AS 4055	Wind loads for housing, Australian wind classification
EN 1991-1-4	Eurocode 1, wind actions
ANSI/DASMA 102	Sectional garage doors, US industry standard
ASTM B209	Aluminium sheet and plate, mechanical properties

ROGENILAN builds the full aluminium envelope from one extrusion and coating platform, so a woodgrain garage door can be finished to match the rest of the opening package.

ROGENILAN builds woodgrain aluminium sectional doors, entry doors, sliding and folding systems and sunrooms on one extrusion and coating platform, so a wood garage door can be finished to match every other opening on the project. Send the RFQ items in section 17 and a size-by-size quotation comes back within 48 hours.

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