A house is clad once and the owner lives with it. A commercial building is clad on a schedule, signed off by someone who will not be on site, and maintained by a facilities team that has to reach the wall with a machine. Those three differences decide the specification more often than the appearance does.
Five things that change on a commercial project
- The fire paperwork is checked first. On commercial facades the class is a gate, not a preference, and it is verified before samples are looked at.
- The warranty has to be readable by a third party. Client, contractor and facilities manager may all be different companies by year five.
- Maintenance access has a price per cycle. Anything that needs recoating on a two-storey elevation is a scaffolding or lift invoice, not a paint invoice.
- The schedule is fixed by others. Production windows for non-standard colours and lengths have to be stated up front, because site dates are not movable.
- The procurement route is longer. Main contractor, facade subcontractor, importer and specifier all have to accept the same document set.
Fire class is the first gate
This is where commercial projects stop. The class required, and the laboratory accepted as proof, changes by market. From our own field visits across thirteen markets between 2023 and 2026:
| Market | What the project required |
|---|---|
| Netherlands and Germany | New-build elevations specified at class B; renovation work accepted at class D. One specification moved cladding from D on timber battens to C on aluminium battens, changing the substructure rather than the board. |
| Italy | Fire classification from an Italian-accredited laboratory. A report from another country was not accepted. |
| Japan | Public and government-linked projects recognised domestic test reports only. |
| California | WUI fire approval for wildland-urban interface zones, applied for per product model, submitted to CALFIRE with a fire report, renewed every year. |
| Florida | A Notice of Acceptance for cladding and fencing in hurricane zones, signed off by a licensed engineer. |
| Canada | A fire-qualified product on commercial facades, and third-party certification for boards longer than 12 ft (3.66 m) if they are fixed without clips. |
| United Kingdom and France | Exterior cladding sits behind fencing in maturity and the entry barrier is higher, because fire and structural paperwork is reviewed before the product. |
| Australia and New Zealand | A bushfire attack level rating for cladding in designated bushfire zones. |
One point decides whether that table is useful or misleading. A fire classification is only valid for the assembly it was tested in. Our own EN 13501-1 report states its end-use conditions: a 26 mm specimen, with a substrate, with mechanical fixing, no joint between boards, and a 40 mm ventilated cavity behind the panel. Report SDHL250200203201HI gives B-s3, d0 under those conditions. If the commercial detail changes the cavity, the fixing or the joint, the class has to be re-confirmed rather than carried over.
Warranty and maintenance access
The commercial case for a composite cladding board is not a low purchase price. It is the absence of a recurring access cost. Timber cladding needs retreatment every 4 to 9 years, and on a commercial elevation most of that invoice is the lift, the scaffolding and the labour rather than the coating.
So the two numbers to put side by side are the board cost per square metre and the number of recoating cycles over the hold period, multiplied by the cost of access and labour per cycle. On most commercial projects the second term decides which material is cheaper, and the facilities budget is where it lands.
Read the warranty as a document, not a duration. Product documentation lists a 10 year warranty and the coverage scope follows the formal warranty terms, the configuration supplied and the verified project conditions. Ask what is excluded, and whether the cover reaches the substrate, the fixing and the labour.
The material decision that removes a maintenance cycle
The previous section priced the access cycle. This one is about which board takes the cycle out of the budget, because on a commercial elevation the difference between two composite boards sold in the same colour is inside the board.
On a commercial wall a composite board is chosen by generation, and the generation decides whether the facade ever needs refinishing. A board from an earlier generation takes the weather through a co-extruded outer layer, but its grain comes from a single mould, so the same pattern repeats board after board. FlowVeins is a fourth generation board: molecular crystal curing sets the grain and the ASA surface together, the pattern does not repeat, and the colour sits inside the layer that takes the weather.
The grain matters commercially as well as visually, because it is the part the client and the planning committee look at. A pattern that repeats reads as a printed product on a two-storey elevation, and no specification document corrects that once the wall is up. FlowVeins puts the appearance at 99% of a timber board, and on a commercial wall that is the difference between a finish and a substitute.
Be precise about what the fourth generation buys, because a facilities team will hold you to it. It removes the recurring surface treatment from the maintenance plan, it removes the distortion that comes from a board taking on water, and it removes the fading that ends the life of a lower generation panel. It does not remove the need to keep the base drain and the cavity clear, and it does not change the fire classification of the assembly. Those stay as separate line items, and the specification should say so.
The testable version at tender is two lines in the schedule. Name the generation and the surface process of the board being priced, and state the number of refinishing cycles assumed over the hold period, with the access cost attached to each. A board that answers both in writing is a different procurement risk from one that answers neither.
What the specification should fix before tender
- Profile reference, colour and the surface finish, by name, not by photograph.
- Coverage calculated on the exposed face: 150 mm for FV01 and 195 mm for FV02, with a stated waste allowance.
- Fixing method, joist centres at 300 to 400 mm, and the fire report condition the fixing has to match.
- Trims and edging in matching colour, listed as line items rather than left to the contractor.
- Fire class with the end-use conditions quoted from the report, plus the market-specific approval if one applies.
- Warranty duration with exclusions, and the maintenance regime the warranty assumes.
- Incoterm, port, production window per colour, and the minimum quantity per profile.
Reference installations
Composite cladding is used on commercial and mixed projects in several of the markets we serve. The pattern that repeats is the same: the wall is used to carry the front of the building, and the board is set around openings rather than covering the full elevation.
Where the wall is a screen rather than a surface
A second commercial use is the screen wall: pool surrounds, terraces, plant enclosures and service screens, where the board is seen from both sides and the wall behind it is not the thing being protected. The fixing logic does not change, but the base detail does, because the cavity has to drain somewhere the water can go.
When FlowVeins is the wrong specification
- Anywhere the facade has to be non-combustible. FlowVeins is EN 13501-1 B-s3, d0: combustible, limited smoke, no flaming droplets. A non-combustible requirement rules it out at the first gate.
- A tendered project where the lowest compliant board wins. That is a legitimate commercial criterion, and it is a different product.
- A building whose facade maintenance plan assumes the cladding is the waterproofing. This is a rainscreen board, and the cavity, flashing and weather-resistive barrier do that job.
Frequently asked questions
What fire class does commercial cladding need?
It depends on the market and the building. Field examples from our own visits: class B on new-build elevations in the Netherlands and Germany with class D accepted on renovation, a fire-qualified product on Canadian commercial facades, and a Notice of Acceptance in Florida hurricane zones. FlowVeins holds EN 13501-1 B-s3, d0 under a stated assembly.
Is the fire certificate valid for any wall build-up?
No. A classification applies to the construction it was tested in. Ours is screw-fixed to a substrate, no joint between boards, with a 40 mm ventilated cavity. Different cavity, fixing or joint means the class has to be re-confirmed.
How many boards do I need for a commercial elevation?
On exposed face, 2.30 boards per square metre for FV01 and 1.77 for FV02. A 40 m² wall takes 92 FV01 boards or 71 FV02 boards before waste, so allow 100 and 77 with 8 percent for cutting and openings.
What maintenance does the cladding need?
Washing. The point of an ASA cap is that the colour is in the cap layer and the board does not need recoating, which removes the access and labour cycle from the facilities budget. It does not remove the need to keep the base drain and the cavity clear.
Can you supply trims to match?
Ask for the trim list with the quotation. Trims and edging are the line item most often left out of a commercial package and the part the client sees at every corner and reveal.
What are the commercial terms?
FOB Shenzhen, half a container per profile and colour, with colours combinable in one load. Standard profiles are 2.9 m long, custom lengths on request, and non-standard colours run on their own production window.
Specification summary
- Profiles: FV01 flat 178 × 15 mm, 150 mm exposed face; FV02 slat-wall 223 × 25 mm, 195 mm exposed face
- Coverage: 0.435 m² and 0.5655 m² per 2.9 m board
- Fire: EN 13501-1 B-s3, d0 (26 mm specimen), screw-fixed to substrate, no joints, 40 mm ventilated cavity (SDHL250200203201HI)
- Other data: UV ASTM G154 3,000 h ΔE*ab 2.7 (SDHL2407013318HI); water ASTM D1037 1.8% / 0% swell (SDHL2408014917HI); flexural 28.3 MPa after freeze-thaw (SDHL250601030601HI)
- Timber: FSC chain-of-custody ESTS-COC-240458
- Terms: FOB Shenzhen, half a container per profile and colour
Send the elevation area, the required fire class and the target port to request a quotation. Product detail is on the exterior wall cladding page, and the failure modes behind facade complaints are set out in the facade cladding failure guide.