Mr Quyen - Santiago. Posted 03/11/2026
A PVC roofing sheet for a roof should be at least 2.5 mm thick. Santiago makes its ASA/PVC sheets and roof tiles 2.5 – 3.0 mm thick, and the 10-year warranty starts at 2.5 mm. A 2.5 mm sheet weighs about 5.2 kg per running metre. Choose 3.0 mm for long factory roofs, windy or coastal sites and roofs that people walk on often.
Cut end of a pale green ASA/PVC sheet: one solid co-extruded sheet, the same thickness across the whole profile
Which thicknesses does Santiago make?
| Thickness | Used for | Warranty |
|---|---|---|
| 2.0 mm | Some 6 and 11-wave sheets, made to order; not recommended for the main roof of a building | None |
| 2.5 mm | The standard thickness for houses, warehouses and farms | 10 years |
| 3.0 mm | Roofs that need a stiffer sheet | 10 years |
Each sheet is co-extruded as four layers at once: an ASA surface that blocks UV and holds the colour, a virgin PVC layer, a PVC core and a milky-white PVC base. No glue sits between the layers, so the thickness you measure is one solid sheet, and a thicker sheet simply has thicker layers.
How much does a PVC roofing sheet weigh?
A Santiago sheet 2.5 mm thick and 1.05 – 1.08 m wide weighs about 5.2 kg per running metre. Divided by the cover width of each profile, that gives the load on the roof frame:
| Profile, 2.5 mm | Cover width | Per running metre | Per m² of roof |
|---|---|---|---|
| 5 square waves | 1,000 mm | about 5.2 kg | about 5.2 kg |
| 6 square waves | 950 mm | about 5.2 kg | about 5.5 kg |
| 11 square waves | 1,000 mm | about 5.2 kg | about 5.2 kg |
| Roof tile | 960 mm | about 5.2 kg | about 5.4 kg |
Use these figures to plan the frame and the freight. A 3.0 mm sheet is heavier; the packing list of each order states the real weight.
Cut end of a cream ASA/PVC sheet showing its wave profile and wall thickness
When is 3.0 mm worth the extra cost?
For houses, verandas, kiosks and small stores, 2.5 mm is enough as long as the purlins are spaced correctly. Pay for 3.0 mm on:
- long factory and warehouse roofs
- sites with strong wind or typhoons
- buildings close to the sea
- roofs that staff climb onto for regular checks
A thicker sheet does not allow wider purlin spacing. Plastic is softer than steel, so keep purlins less than 700 mm apart whatever thickness you buy. Thin metal sheet of 0.35 – 0.45 mm dents when someone steps on it; a 2.5 – 3.0 mm plastic sheet flexes and comes back, but only when it is supported often enough.
Why not buy a thinner sheet to save money?
A sheet under 2.5 mm is lighter and cheaper, and also softer. On a roof it sags between purlins, its ribs dent when screws are tightened, and it gets damaged when someone walks on it during repairs. Years of sun make the sag easier to see. Santiago therefore does not recommend sheets under 2.5 mm for roofs and gives no warranty on them.
Blue ASA/PVC sheets laid on a workshop floor, with the white PVC base visible at the edges
How do I check the thickness of a delivered sheet?
- Measure the cut end with a caliper at several points along the sheet and keep the smallest reading.
- Compare it with the quotation and the packing list, which state the thickness of every item.
- Weigh a one-metre piece: a 2.5 mm Santiago sheet should come close to 5.2 kg. A much lighter piece means a thinner sheet.
Green and blue ASA/PVC sheets stacked before delivery
Does a 2.5 mm ASA/PVC sheet take weight? Watch the truck test
Mr Quyen lays a blue ASA/PVC tile sheet and a blue corrugated sheet on the yard at the Santiago factory in Vietnam, and a Santiago delivery truck drives over them. The short shows the test from start to finish. It is a demonstration only: on a roof, the sheet still needs purlins less than 700 mm apart.
Truck test on Santiago ASA/PVC sheets (Santiago video on YouTube).
More short videos: sheet thickness in practice
Three more English shorts from the Santiago YouTube channel. Each one is about a minute or less.
What does a finished 2.5 mm tile-sheet roof look like on site?
Mr Quyen holds a green ASA/PVC sheet at the factory, then climbs onto a grey tile roof that installers are still screwing down, and finishes on a completed grey roof beside the gutter.
Santiago uPVC tile roofs on site (Santiago video on YouTube).
What does it look like when a worker stands on a tile sheet?
A Santiago worker stands on a white tile sheet on the factory floor and a gas torch is pointed at red and blue sheets beside it. The short ends with the team in front of an export container.
Santiago tile sheets at the factory (Santiago video on YouTube).
Does a 2.5 mm sheet crack when you bend or cut it?
Mr Quyen bends and cuts beige and orange sheets with metal shears in the Santiago factory while he explains in English, with captions, how the sheet holds up. It is a demonstration; a roof still needs purlins less than 700 mm apart.
Bending and cutting test on Santiago ASA/PVC sheets (Santiago video on YouTube).
Santiago – a leading exporter of ASA/PVC roofing from Vietnam
Santiago roofing is produced and loaded into containers at our factory in Vietnam. It has been exported to India since 2023, Thailand since 2024 and the USA since 2025. Every export shipment comes with a commercial invoice, packing list, bill of lading and a certificate of origin (C/O) issued by Vietnam's Ministry of Industry and Trade, which importers use to claim the duty preference of their trade agreement.
| Item | Details |
|---|---|
| HS code | 3925.90.00 (ASA/PVC roofing sheets) |
| Certificate of origin | Form D (ASEAN), Form AI (India), Form AK / VK (Korea), Form AJ / VJ (Japan), Form VC (Chile), CPTPP proof of origin |
| Shipped from | Vietnam, by container |
Certificate of origin Form AI (ASEAN–India) for Santiago ASA/PVC roofing sheets, HS 39259000, certified on 24 September 2026. Buyer details are hidden.
The Santiago team beside a loaded export container at the factory, November 2024
Loading Santiago roof tiles into an export container
Frequently asked questions
What thickness should a PVC roofing sheet be?
At least 2.5 mm for a roof. Santiago makes 2.5 and 3.0 mm sheets and roof tiles, and its 10-year warranty covers both.
How much does a 2.5 mm PVC roofing sheet weigh?
About 5.2 kg per running metre for a Santiago sheet 1.05 – 1.08 m wide, which is about 5.2 kg per m² of roof for the 5-wave sheet.
Is a 3.0 mm PVC sheet better than 2.5 mm?
A 3.0 mm sheet is stiffer, so it suits long factory roofs, windy or coastal sites and roofs that people walk on. For houses and small buildings 2.5 mm is enough when the purlins are less than 700 mm apart.
Does thickness change the price?
Yes. A 3.0 mm sheet costs more than a 2.5 mm sheet of the same profile, and a Santiago quotation states the thickness beside each price.
Read more
- Why the ASA surface layer matters on a PVC roof
- PVC roofing sheet types: 5, 6 and 11-wave sheets
- ASA/PVC roofing order checklist for buyers
- ASA/PVC roofing sheet, 5 square waves
Sources for the figures in this article
- Profiles, 2.5–3.0 mm thickness and 10-year warranty: Santiago ASA/PVC product specification.
- HS code 3925.90.00: Harmonized System Chapter 39 (builders' ware of plastics), as applied in Vietnam's export tariff.
- Certificates of origin (Form D, AI, AK/VK, AJ/VJ, VC, CPTPP): issued by Vietnam's Ministry of Industry and Trade under the country's free trade agreements.
- Minimum order of one 40 ft container (about 5,000 m) and about 5 days for production and loading: Santiago export desk, October 2026.
Updated 03/11/2026. Santiago Import Export Co., Ltd, Vietnam. WhatsApp +84 935 391 495 (Mr. Quyen), hotline +84 965 437 316 (Mrs. Ly), email salessantiagoroofing@gmail.com.
