Top 10 Fentre Aluminium Profile Systems in China: Fentres Coulissantes en Aluminium, 6063-T6 Extrusion and FOB Pricing

1. Anatomy of a Fentre Aluminium Profile System

A fenetre aluminium is not one extrusion. A complete system is a family of six to twelve dies that must share the same gasket grooves, hardware channel, drainage planes and glazing rebates. Once the dies are cut, those interfaces are fixed for the life of the tooling — which is why the specification decisions below have to be taken before the first billet is pushed.

The six functional parts

Chamber count and what chambers actually do

Marketing literature counts chambers as if more were automatically better. The physics is narrower. A chamber does three things: it breaks the aluminium conduction path, it adds a convective cavity whose combined radiation-plus-convection coefficient is around 5-7 W/m2K, and it gives a place for water to be managed separately from air. Beyond three chambers in the frame the marginal thermal gain is small — foam filling those chambers is worth roughly 0.18 W/m2K on Uf, which is about the same as going from a 24 mm to a 30 mm polyamide strip, at a fraction of the material cost.

• Three-chamber frame, 14 mm strip: Uf around 3.4 W/m2K — the entry export configuration.
• Five-chamber frame, 24 mm strip: Uf around 2.26 W/m2K, and enough room for a pressure-equalised drainage path.
• Same geometry with foam inserts: about 2.08 W/m2K. The foam buys roughly one strip-width step.
• Chambers must be drained and vented separately, or condensate collects where it cannot be seen and the frame corrodes from the inside.

2. Alliage et trempe: 6060-T66 and 6063-T6

Window profiles are overwhelmingly 6060 and 6063. The reason is not strength. It is extrudability and surface quality: both alloys flow through fine, multi-void window dies at high speed and both give a defect-free surface for powder coating and anodising. 6061 and 6082 are stronger but need 60-75% more extrusion pressure and will not hold the tolerances of a thin-walled window section at an economic run-out speed.

EN 755-2 mechanical properties and the Eurocode 9 allowable stress

The allowable stress column divides Rp0.2 by the Eurocode 9 partial factor for resistance of members, gamma M1 = 1.10. For 6063-T6 that gives 155 MPa. Every deflection and span table later in this page is checked against that number, and — as with doors and curtain wall — the result is always the same: the frame reaches its deflection limit long before it reaches 155 MPa.

T5 versus T6, and why it matters for lead time

T5 is cooled from the extrusion temperature by forced air and aged naturally; T6 is water or mist quenched and artificially aged in a batch oven. T6 gives roughly 55% higher proof stress on 6063 (170 vs 110 MPa) but adds an oven cycle of about 6-8 hours plus the handling in and out. On a project where the frame is deflection-controlled, T5 is often sufficient and saves a day of throughput. On large sashes where the corner crimp and the hinge fixings are the governing detail, T6 is the safer choice because the local bearing stress at the fixing is a strength problem, not a stiffness problem.

3. Extrusion: Ratio, Press Tonnage and Tolerances

The extrusion ratio R is the billet cross-section divided by the profile cross-section. It sets the pressure the press must deliver, which sets the tonnage class, which sets which factories can run the die at all. A 70 mm frame profile of about 780 mm2 extruded from a 152 mm billet gives R about 23 — comfortable for 6063, marginal for 6082.

Extrusion ratio and required press size

Read the last three columns as a sourcing constraint. A factory running a 1,000-tonne press can produce every 6060 and 6063 window profile in the catalogue. The same die in 6082 needs roughly 815 tonnes for a plain frame and more for a deep mullion, so the stronger alloy quietly halves the number of suppliers who can quote. This is why “let us use 6082 for extra strength” is almost always the wrong answer for a fenetre en alluminium: the strength is not needed and the supply base is.

Dimensional tolerances: EN 12020-2 versus EN 755-9

The tolerance that actually causes field problems is not the outside dimension of the frame. It is the knurl channel that grips the polyamide strip. If the channel is 0.1 mm oversize after die wear, the knurling teeth do not bite and the composite shear strength of the profile drops. That failure is invisible on delivery and appears as sash droop and hardware bind after a season of thermal cycling. Ask for a strip shear test result per die batch, not per profile family.

4. Rupture de pont thermique: Strip Width, Material and Uf

The thermal break strip is the single most cost-effective thermal decision in a fentre aluminium. It is a polyamide strip crimped into knurled channels in both aluminium shells, so the heat path from inside to outside crosses 14-34 mm of polymer with a conductivity of about 0.25-0.30 W/mK instead of aluminium at 160 W/mK.

Uf versus strip width

The curve is steep at the low end and flat at the high end. Going from no break to a 14 mm strip removes roughly 2.8 W/m2K. Going from 24 mm to 34 mm removes only about 0.63 W/m2K, for a wider, heavier, more expensive profile. The practical consequence: if the target is a French RE2020 or a Belgian EPB Uw of 1.4-1.6, a 24 mm strip with Low-E double glazing and a warm-edge spacer gets there; a 34 mm strip is only necessary when the glazing cannot be upgraded, or when the frame share of the opening is unusually high.

What to write in the purchase order

• Strip material: PA66 GF25, with a declared tensile strength at 23 °C and at 80 °C.
• Composite shear test result for the specific die, not for the profile family.
• Strip width, measured across the heat-flow direction, with the frame depth stated alongside.
• Whether the chambers are foam-filled, and with what density — low-density foam adds weight without adding resistance.
• Colour of the outer shell: a dark frame at 0.9 solar absorptance reaches 70-75 °C, which is inside the creep range of a PVC strip.

On the wider question of how Uf combines with glass and spacer into a whole-window Uw, and how that maps onto French RE2020 thresholds and Acotherm classification, the fenetre aluminium compliance page covers the regulatory side in detail. This page stays on the manufacturing and purchasing side.

5. Double Vitrage: Ug, Warm Edge and the Whole-Window Uw

A fenetre en alluminium double vitrage avec moustiquaire is the standard French residential specification: double glazing, an opening sash, and an insect screen. The glazing contributes about 72% of the window area in a 1.23 x 1.48 m reference window, so it dominates the thermal result.

Ug calculated to EN 673

These are EN 673 calculation results with a 283 K mean cavity temperature and a 15 K temperature difference across the cavity. The two numbers worth memorising: uncoated argon-filled double glazing lands at 2.60, and adding a soft-coat Low-E surface at emissivity 0.037 drops it to 1.08. The coating is worth about 1.5 W/m2K; the gas is worth about 0.27. That ratio — roughly five to one — is the reason “argon-filled” appears in so much marketing copy and delivers so little on its own.

Spacer Psi and the warm-edge decision

Switching from an aluminium spacer to a thermoplastic one moves Uw by about 0.09 and costs USD 6-9 per m2. That is roughly USD 100 per unit of U — worse value than the Low-E coating and worse than the thermal break. Warm edge is therefore bought for edge condensation, not for U-value: the edge-of-glass temperature rises by 3-5 K, which is what stops the black mould line that appears along the perimeter of a French north-facing window in February.

Whole-window Uw matrix

The two right-hand columns are the same frame with a different glazing spec. The spread at every break width is around 1.2-1.4 W/m2K, while the spread across the whole break width range at fixed glazing is about 1.26. In other words, glass and profile are worth about the same — but glass costs USD 12-18 per m2 to upgrade and a wider profile costs USD 24-58 per m2. Buy the glazing first.

For the cavity physics behind those Ug numbers, including gas-fill retention to EN 1279-3 and the altitude problem that affects sealed units shipped to high elevations, see the double glazed windows engineering page.

6. Moustiquaire: Mesh, Open Area and Cassette Design

On the French market the insect screen is not an accessory the client buys later — it is written into the CCTP alongside the window, and a fenetre en alluminium double vitrage avec moustiquaire is a single procurement line. That changes the engineering, because the screen has to share the sash volume with the hardware and the drainage.

Mesh geometry and what it costs in airflow

Open area is the square of the aperture-to-pitch ratio, so it falls fast as the wire thickens. An 18 x 18 fibreglass mesh at 0.23 mm wire passes 70.1% of the air an unscreened opening would; the same nominal mesh count at 0.28 mm wire passes only 64.3%. A 20 x 20 mesh at 0.18 mm wire is the best of both at 73.7%, but the finer wire is more easily torn by a cat or a child, so it is normally specified on upper floors only.

• Fibreglass PVC-coated: cheapest, 18 x 16 standard, will not dent, but creases permanently if folded in transit.
• Aluminium mesh: better airflow and no sag, but it is a dissimilar metal — on a coastal site it becomes the anode against the frame.
• Stainless 316 mesh: for C5-M coastal or poolside, roughly 3.5 times the fibreglass price, no galvanic risk against A4 fixings.
• Pet-resistant polyester: 0.4-0.6 mm wire, open area down to about 55%, specified only where it is really needed.

Cassette versus fixed frame, and the sliding-window conflict

7. Fentres Coulissantes en Aluminium

Fentres coulissantes en aluminium — aluminium sliding windows — are the variant where the specification is most often wrong, because buyers apply casement expectations to a product that seals by brush and labyrinth instead of by compression.

Inline sliding versus lift-and-slide

The honest statement of the trade-off: an inline slider is a low-cost, low-maintenance opening for a sheltered position. A lift-and-slide is a compression-sealed window that happens to move sideways. If the specification says “coulissante” and the facade is exposed, the right question is not which slider but whether a sliding window is the right product at all — the aluminium sliding window page goes through that selection.

Roller load and track geometry

• Roller load is a dynamic rating, not a static one. A 120 kg sash on two rollers sees roughly 60 kg static each, but the start-up impulse and any track debris spike that to 90-110 kg. Specify rollers at 1.5 times the static share.
• Roller bearing material: sealed steel bearings are standard; nylon-encapsulated bearings run quieter but deform under continuous load at temperatures above 60 °C, which a dark frame in a south-facing reveal reaches.
• Track must be continuous and level within 1 mm per metre. A 2 mm step will be felt as a hard spot and will eventually flat-spot a roller.
• Drainage: an inline slider needs a drained outer track with weep slots sized so that a 1 mm grit particle passes. Slots of 5 x 12 mm, spaced at 300 mm, are the practical minimum.

8. Reading a French CCTP for Fentres en Aluminium

A French order is not a quotation, it is a Cahier des Clauses Techniques Particulieres. Three items in it cause most of the factory-side errors on fentres en aluminium, and all three are decided before production.

Dimensional basis and tolerance

Export orders should always be converted to finished overall sizes and countersigned. A French site measured to the masonry opening and a Chinese factory cutting to a finished size is a 40-60 mm discrepancy that no amount of silicone will hide.

Pose type, and the performance classes that follow

• Pose en applique: the window is fixed against the inner face of the wall. Simplest, keeps the maximum glass area, but leaves the outer reveal exposed.
• Pose en tunnel: the window sits in the thickness of the wall. Best thermal result because the frame is partly shielded, but requires an accurate opening.
• Pose en feuillure: the window sits in a rebate. Common in renovation, gives the best watertightness, reduces glass area.
• Whichever is chosen, the EN 12208 watertightness class quoted must match the exposure. A supplier quoting Class 7A for a window that ends up on an exposed fourth-floor facade is quoting a protected-position result.

The full regulatory picture — RE2020 thresholds, Acotherm AC1-AC4, CEKAL glazing certification, CE marking to EN 14351-1 under AVCP System 3, and the NF DTU 36.5 installation rules — is set out on the fenetre aluminium compliance page. The Spanish equivalent, with CTE DB-HE1 Uw limits by climate zone, is on the ventanas de aluminio y cristal page.

9. Section Properties and Wind Load: Deflection, Not Strength

Wind load on a fentre aluminium is carried by the mullion and transom, and by the sash if it is large. The calculation that governs the design is almost never the stress check. It is the deflection limit, because the failure that matters is not the mullion breaking — it is the mullion bending enough to break the glazing seal or jam the sash.

Rectangular section properties

Ix grows with the cube of the depth. Doubling a mullion from 50 mm to 100 mm deep multiplies the second moment of area by roughly eight while adding only about double the material. That is why deep mullions are the cheapest stiffness available, provided the sightline can accept them.

Maximum span at L/200, 1,000 mm tributary width

The utilisation column is the point. At 1.0 kPa — a normal low-rise suburban exposure in French wind zone 3 — a 70 x 50 x 2.0 mullion spans 1,734 mm at its deflection limit and is using 31% of its allowable stress. The aluminium is doing almost nothing. Adding a transom or an intermediate anchor halves the span and cuts deflection by a factor of sixteen, which is always cheaper than moving up a section.

Tributary width sensitivity

Halving the tributary width from 1,500 mm to 750 mm buys about 25% more span. It is worth more than upgrading from a 70 mm to an 80 mm section, and it costs one extra vertical member.

10. Surface Finishing: Qualicoat, Qualanod, PVDF and Sublimation

The finish is the part of a fenetre aluminium that the client sees and the part that fails first if it is underspecified. It is also the item most often quoted loosely — “powder coated” without a class, a pre-treatment, or a thickness.

Pre-treatment and coating classes

Pre-treatment is where the real difference sits. A chrome-free zirconium or titanium conversion layer plus a de-oxidising and a de-smutting stage gives adhesion that survives 1,000 hours of neutral salt spray. A cheap three-stage iron-phosphate line looks identical on day one and starts to creep from the cut edges in the second winter. Every coating label above assumes a multi-stage pre-treatment; none of them certify the adhesion that a skipped stage removes.

Matching the finish to the exposure

• Inland, C2-C3 (ISO 9223): Qualicoat Class 1 at 60-80 um is adequate and is the cheapest compliant option.
• Coastal 1-3 km, C4: Qualicoat Class 2 or Qualanod AA25. Specify A4 (316) stainless fixings in the same order.
• Coastal under 1 km or poolside, C5-M: AAMA 2605 PVDF or a two-coat PVDF system. The price delta of USD 26-38 per m2 is roughly 20% of the frame cost and avoids a re-coat that cannot be done in situ.
• Aluminium mesh insect screens are a galvanic risk in C4-C5: the mesh is the anode against the frame. Use 316 stainless mesh or accept that the mesh is a consumable.
• ISO 9227 salt spray is a batch-to-batch ranking test, not a service-life prediction. 1,000 hours of NSS does not mean 1,000 hours outdoors. Use it to compare suppliers, never to predict a guarantee period.

11. From Billet to Crate: 14 Steps and Where the Time Goes

Total elapsed time for a first container is about 44 days. Two things stand out. Surface treatment and coating together are under four days of actual work but sit behind a six-day kitting buffer. And the single largest item is the seven days waiting for the buyer to sign off the shop drawings at 16% of the elapsed schedule.

The only compressible item

Everything else in the table is physics or queueing. Ageing takes eight hours because the precipitation hardening curve takes eight hours. Curing takes as long as the oven cycle. But drawing sign-off is pure latency, and it is on the buyer side. A project that returns the signed drawings in 48 hours instead of seven days ships a week earlier, at no cost.

Inspection points that catch real defects

• Extrusion: dimensional check on the thermal-break knurl channel, per die, per batch. This is the one that fails silently.
• After crimping: corner squareness within 1 mm on the diagonal, and a corner shear test on one sample per hundred.
• After coating: film thickness by eddy-current gauge at five points per length, plus a cross-cut adhesion test per batch.
• Glazing: IGU thickness verified against the glazing pocket depth — a 32 mm unit in a 28 mm pocket is the most common assembly error and it distorts the gasket.
• Final: dry-build one complete unit of every specification and photograph it. That single step catches more errors than all the dimensional checks combined, because it exposes interface problems between parts that each passed individually.
• EN 1279-2 moisture test and EN 1279-3 gas leakage certificates, matched to the actual production batch rather than to a generic glazing supplier certificate.

12. FOB Pricing by Profile Series and Volume

Prices below are FOB Foshan, per square metre of window area, for a standard white or grey Qualicoat Class 1 finish, 4-16Ar-4 Low-E double glazing with an aluminium spacer, and standard hardware. They are the output of a cost model, not a promotion. Volume tiers are per order, not per project lifetime.

Series matrix

The spread from S1 to S6 is about 2.9 times. Roughly half of that is profile mass and half is the wider polyamide strip, the foam inserts and the larger glazing pocket. Note that the step from S4 to S6 — 0.63 W/m2K on Uf — costs USD 58-70 per m2 at every volume tier. The step from a float double glazing to Low-E argon, worth about 1.5 W/m2K on Ug and roughly 0.9 on Uw, costs USD 12-18 per m2. The glazing upgrade is around five times better value per unit of thermal improvement.

Option upcharges

13. MOQ, Lead Time, Payment, Packing and Container Loading

Commercial terms

Container loading: fenetres are volume-limited, not weight-limited

Every configuration is volume-limited. A 40-foot high-cube takes about 239 m2 of window — roughly 161 units — and uses only 28% of the payload allowance on standard double glazing. Even with triple glazing and a laminated inner pane the payload reaches 37%. The practical conclusions follow directly:

• Knock-down packing does not help. Glass cannot be nested and the frame is not the volume driver; the crate void is.
• The real optimisation is crate engineering: tighter dunnage and a crate height matched to the container aperture can move the figure from about 220 m2 to 260 m2, which is a 15% freight reduction for no product change.
• Because the payload is only 28-37% used, windows consolidate well with heavier goods — doors, hardware, stone sills — in the same container. A mixed container is materially cheaper per m2 than a dedicated one.
• Below about 8-10 m3, LCL is cheaper. Above that, the freight per m2 of a full container is roughly USD 13.4 against USD 45-70 for LCL.

A worked comparison of a low-cost bill of materials against these numbers, including the frame-to-glass cost split, is on the low price aluminium windows cost page.

14. Landed Cost Model and Tariff Sensitivity

Base case: S4 at 500-1,500 m2, Le Havre

Sensitivity

The duty scenarios span USD 35 per m2 installed; the anti-dumping scenarios span USD 44. Both are larger than the entire difference between the S2 and S4 profile series. In other words, for any export order into the EU, tariff classification is a bigger cost lever than product specification. That is not an argument for a cheaper frame — it is an argument for settling the classification before optimising the product.

15. Installation Sequence and Six Failure Modes

Sequence

1. Verify the opening against the signed drawing. Check diagonal within 5 mm and the sill level within 2 mm per metre.
2. Set the precadre or the fixing lugs. Stainless A2 inland, A4 within 3 km of the coast or around a pool.
3. Dry-fit the frame, shim at every fixing point, and confirm the sash opens and closes before fixing.
4. Apply the perimeter air seal — a vapour-open external tape and a vapour-checked internal membrane, not silicone alone.
5. Fix mechanically through the lugs at 150 mm from each corner and 400-600 mm centres.
6. Set the sill and the external reveal trim so that water is shed outward, with a minimum 5 % fall.
7. Glaze, set the beads square, and check the glazing packers are at the quarter points.
8. Commission: adjust hinge and strike compression, check operating force, and flood-test the drainage path with 2 litres of water.

The French installation reference is NF DTU 36.5. The details that differ from northern European practice are the vapour-open external tape — the French detail lets the wall dry outward — and the requirement for a continuous sill membrane turned up at both ends. Silicone alone on the external perimeter is a guaranteed future leak because it is a vapour barrier on the wrong side.

Six failure modes

• Frame distortion from over-shimming. Shimming only at the corners and then tightening the fixings bows the frame and the sash binds. Shim at every fixing, and never pull the frame to the wall with the fixings.
• Blocked drainage. Mortar and render in the weep slots is the single most common defect on French sites. The flood test in step 8 exists to prove the path before the scaffiolding comes down.
• Fixings through the thermal break. A screw driven through the polyamide strip bridges the break and creates a cold spot that shows as a condensation patch on the frame within the first winter.
• Wrong water class for the exposure. Class 7A tested in a protected configuration will not hold on an exposed upper floor. Match the specification to the facade, not to the certificate.
• Galvanic contact. Aluminium against bare steel, copper or CCA-treated timber, or against wet concrete at pH 12-13. Isolate with EPDM or a bituminous coat, and never use brass fixings.
• Screen track sharing the sash drainage. On coulissantes this blocks within one season and then backs up into the frame. It is a drawing-stage decision and cannot be corrected on site.

16. Project Records

Bordeaux: 186 openings, 1960s eight-storey residence

A renovation of a 1960s residence in Bordeaux replaced 186 openings: 92 ouvrants a la francaise at 1.48 m2, 64 fixed lights at 2.60 m2 and 30 fentres coulissantes en aluminium at 3.20 m2, for a total of 398.6 m2 of window area. The specification was a 70 mm frame with a 24 mm polyamide break, 4-16Ar-4 Low-E with a warm-edge spacer, Qualicoat Class 1 in RAL 7016, and an integrated roller insect screen on every opening sash in the bedroom stack.

Measured outcomes at twelve months: Uw 1.51 on the casement units against a design value of 1.48, zero condensation complaints against 11 recorded on the previous single-glazed aluminium frames, and two service calls, both handle adjustments. The Uw was verified by the same EN ISO 10077-1 calculation used for the design, redone against the as-built spacer and gasket schedule — the 0.03 discrepancy is the difference between the specified and the delivered spacer.

The one specification regret recorded by the client: the coulissantes were ordered as inline sliders rather than lift-and-slide to hold the budget, and at 3.20 m2 they sit at the top of the inline roller capacity. Two of the thirty had roller replacements in month nine. The upgrade would have cost about USD 3,900 on the order; the replacements plus the call-outs cost about USD 1,100, so the budget decision was not wrong — but it was closer than the client expected.

Annecy: 48 fentres coulissantes en aluminium with integrated screens

Forty-eight sliding windows at 3.20 m2 each, 153.6 m2 in total, on a lakeside development. The specification called for an integrated insect screen on the inner track with its own drainage path, a 30 mm thermal break (Uf 1.89) and an AAMA 2605 PVDF finish because of the altitude UV load.

The screen integration cost USD 55 per opening amortised to USD 17.2 per m2 here, which is the reason the FOB line is higher than the Bordeaux case. The client had originally specified retrofitted clip-on screens at USD 24 each; the integrated cassette cost more but avoided a second site visit and avoided the clip fatigue that shows up in year three. At 48 openings the retrofit route would have been USD 1,152 cheaper and would have needed a separate trade mobilisation.

17. Aluminium Versus PVC Versus Bois-Aluminium

What the comparison actually decides

A material comparison table is only useful if it maps to a decision. In practice the aluminium-versus-PVC question on a French project is settled by three rows, not by the Uf row: maximum sash size, fire behaviour and colour stability under UV. If the largest opening in the schedule is under 2.0 m2, the facade is not regulated for fire reaction, and the colour is white or light grey, PVC is the cheaper compliant answer and should be quoted alongside.

The reverse test is equally quick. Any opening above about 2.6 m2, any dark colour at altitude, any coastal site inside 3 km, or any building where the fire officer asks for a reaction-to-fire classification, moves the decision to aluminium regardless of the Uf comparison — because the alternatives either need steel reinforcement (which adds mass and removes the price advantage) or a maintenance cycle the client will not fund.

PVC wins on Uf per euro and on price, and it wins honestly. It loses where the opening is large, where the sightline matters, where fire performance is regulated, and on dark colours at high altitude UV — Annecy at 450 m with a south-facing dark frame is the case that rules PVC out. Aluminium is the right answer when the opening is large, the colour is dark, the site is coastal, or the building is regulated for fire. Wood-aluminium is a design choice, not a performance choice, and should be priced with its maintenance cycle included.

When not to specify aluminium

• Budget below about USD 90 per m2 installed and no large openings — PVC is the rational choice.
• A heritage or protected facade where the sightline is dictated: aluminium can be made slim, but the approvals process is about appearance, not performance.
• Sites with regular sulphur or copper-based agricultural spraying. Aluminium is amphoteric and dissolves below pH 4 and above pH 9.
• Direct contact with wet concrete or CCA-treated timber without an isolation layer.

18. RFQ Checklist

Technical — eight items

1. Finished overall dimensions, opening sizes and the dimensional basis (finished size, not masonry opening).
2. Frame depth and thermal break width, with the target Uf stated as a number, not as a marketing class.
3. Glazing build-up with Ug, Rw, light transmission and g-value; spacer type; whether heat-soak to EN 14179 is required.
4. Target Uw, calculated to EN ISO 10077-1, with the reference window dimensions stated.
5. AEV classes to EN 12207 / 12208 / 12210, matched to the actual facade exposure and the pose type.
6. Opening type per opening: casement, coulissante, fixed, oscillo-battant — and the insect screen type.
7. Finish: label, class, thickness, colour, and the ISO 9223 corrosivity category of the site.
8. Test documents required: EN 14351-1 DoP, EN 1279-2 and -3 certificates, coating batch certificate, strip shear test.

Commercial — eight items

1. Quantity in m2 and in units, per specification, so the powder changeover cost is visible.
2. Target FOB port and Incoterms version.
3. Required certificates for the destination market: CE DoP, Acotherm, CEKAL, NFRC.
4. Payment terms and whether L/C is required.
5. Lead time from signed drawings, and the penalty or the remedy if it slips.
6. Packing standard and whether the crate height is optimised to the container.
7. Spare parts percentage and which parts: rollers, handles, gasket, not profiles.
8. Warranty terms, and specifically what the coating warranty excludes — most exclude coastal and industrial atmospheres unless the higher class was specified.

19. Glossaire FR-EN and Standards Index

Product and delivery terms

Standards, coatings and ordering terms

Related reading on this site

• Fenetre aluminium: AEV, Acotherm and RE2020 compliance — the French regulatory side.
• Fenetre coulissante: aluminium sliding window specifications
• Baie vitree and coulissante systems: sizes, Uw data and FOB pricing
• Double glazed aluminium windows: EN 673 Ug, warm edge and triple glazing
• Door and window accessories: screens, roller shutters, hardware duty class
• Aluminium windows and doors: frame, double and triple glazed specifications
• Sliding windows wholesale: aluminium specifications and pricing
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