Mr Quyen - Santiago. Posted 12/10/2026
An ASA/PVC roof sheet has two jobs split between two materials. The rigid PVC core carries the load and cannot rust. The ASA top layer faces the sun: it blocks UV and holds the colour, which is why Santiago rates the colour for 30 years. Santiago recommends 2.5 – 3.0 mm sheets and gives the 10-year warranty only from 2.5 mm.
Red-brown ASA/PVC roof tiles at the Santiago factory, March 2022
What does each layer do?
| Layer | Material | Job |
|---|---|---|
| Top surface | ASA | Blocks UV, keeps the colour, weathers in sun and rain |
| Core | Rigid PVC | Carries the load, does not rust, conducts little heat |
PVC on its own fades and turns brittle in strong sun. The ASA layer stops UV before it reaches the core, so the sheet keeps its strength and colour. Service life is over 30 years, typically 25 – 30 years in real use.
Teal ASA/PVC roof tiles at the Santiago factory, March 2022
How can I check the ASA layer on a sample?
Look at a cut edge. The ASA layer shows as a thin band of colour on the top face, over the PVC core. At Santiago's trade fair booths, visitors were handed cut samples for exactly this check. Ask for a free sample before ordering; you pay only the courier.
Why is 2.5 mm the minimum?
A thicker sheet is stiffer between purlins and carries the 10-year warranty. Santiago does not recommend sheets thinner than 2.5 mm and gives no warranty on them. For most roofs, 2.5 or 3.0 mm is the choice.
Blue ASA/PVC roofing sheets stacked in the Santiago warehouse, March 2022
Does the colour matter for heat?
Dark colours absorb more sun than light ones, so the surface of a dark roof runs hotter. Even so, the PVC core conducts far less heat than steel, and the space under an ASA/PVC roof stays about 6 – 8 °C cooler than under bare metal sheets in any colour.
Roofing sheets in stock in the Santiago warehouse, October 2025
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 is ASA on a PVC roof sheet?
The top layer of the sheet: a weather-resistant plastic that blocks UV and keeps the colour.
How long does the colour of an ASA/PVC roof last?
Santiago rates the colour of its ASA surface for 30 years.
What thickness should I order?
2.5 or 3.0 mm. Sheets from 2.5 mm carry the 10-year warranty.
How do I see the ASA layer?
Look at a cut edge of a sample: the ASA shows as a coloured band on the top face.
Read more
- What Santiago's heat, noise and corrosion tests show
- ASA/PVC roof tile colours: how to choose among five
- How long do PVC roof panels last?
- ASA/PVC roofing sheet, 5 square waves
Updated 12/10/2026. Santiago Import Export Co., Ltd, Vietnam. WhatsApp +84 935 391 495 (Mr. Quyen), hotline +84 965 437 316 (Mrs. Ly), email salessantiagoroofing@gmail.com.
