Coffee drying and storage sheds on the Bolaven Plateau in southern Laos stay humid through the rainy season, which rusts metal roofs from the screw holes. ASA/PVC roofing sheets do not rust, and adding translucent skylight sheets, about 5 – 10% of the roof area, gives daylight for sorting beans without lamps.
What does a coffee shed roof need?
- No rust or rust drips onto drying beans.
- Daylight for sorting and quality checks.
- Less heat under the roof in the dry season, when beans are stored.
- Good drainage in heavy rain, so water does not blow in at the laps.
Daylight through translucent skylight sheets
Which sheets fit best?
| Part of the roof | Sheet |
|---|---|
| Main roof | ASA/PVC 6-wave sheet, 34 mm ribs for heavy rain |
| Daylight | 6-wave or 11-wave translucent skylight sheets, about 1 in every 10 – 20 sheets |
| Open drying area | Flat translucent sheet over a light frame |
Check that the skylight sheet profile laps correctly with the roof sheet before ordering; send Santiago the sheet sizes.
Fixing tips for humid sites
Use stainless screws with rubber washers and ASA caps, 4 – 5 sets per m², fixed through the top of the wave. Ordinary plated screws rust first in humid sheds and stain the sheets.
Importing to Laos? Delivery by truck from Vietnam, minimum one 40 ft load (about 5,000 m), production about 5 days, Form D included: importer and distributor guide.
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
Do plastic roofs rust in humid coffee sheds?
No. ASA/PVC sheets contain no metal; use stainless screws as well.
How much skylight should a drying shed have?
About 5 – 10% of the roof area, spread across the roof.
Which profile drains heavy rain best?
The 6-wave sheet, with 34 mm ribs, the deepest in the Santiago range.
Related products: ASA/PVC 5 waves · 6 waves · 11 waves · ASA/PVC roof tile · Skylight sheets
Contact Santiago: Santiago Import Export Co., Ltd, Vietnam. WhatsApp +84 935 391 495 (Mr. Quyen), hotline +84 965 437 316 (Mrs. Ly), email salessantiagoroofing@gmail.com.
Updated October 2026.
