Factory-coated brown corrugated roofing sheets in 12 RAL 8000-series shades, available on galvanized or galvalume substrate. Thickness 0.12 mm – 1.8 mm, width up to 1500 mm, cut to length.
Key Specifications:
Ideal For: Factory roofing, warehouse cladding, agricultural sheds, commercial buildings, and residential villa projects across tropical and subtropical markets.
When sourcing corrugated roofing for large-scale industrial or agricultural projects, consistency matters. At BOMIS, we manufacture our prepainted brown corrugated steel sheets entirely in-house. By controlling the surface prep, priming, and oven-curing ourselves, we ensure exact color matching across bulk shipments—eliminating the mismatched batches that can stall a project. Built to handle intense UV exposure and heavy weather, our RAL 8000 series is a reliable staple for wholesale partners and contractors across Southeast Asia, the Middle East, and Africa.
1. Factory-Applied Brown Coating: The brown topcoat is roller-coated and oven-cured onto galvanized or galvalume substrate under controlled conditions. This produces an even, consistent finish across the full coil width — unlike job-site painting, which can vary with weather, humidity, and applicator technique.
2. Substrate Flexibility: We stock brown corrugated sheets on galvanized steel (GI), galvalume (AZ), and cold-rolled substrate options. For coastal or high-humidity environments, galvalume substrate with PVDF topcoat is the recommended combination — the aluminium-zinc alloy in the substrate provides sacrificial protection at cut edges.
3. Corrugated Profile Strength: The repeating wave geometry increases the panel’s section modulus, so a relatively thin gauge can span wider purlin spacings. This keeps the roof dead load low while still meeting local wind-uplift requirements when proper fastening patterns are followed.
4. Thermal Performance: Brown absorbs more solar radiation than white or light grey, so for unconditioned spaces in hot climates, we recommend pairing these sheets with a reflective underlayment or insulation blanket. BOMIS can advise on suitable insulation combinations for your project’s climate zone.
5. Processing Services: We cut to your specified length and can pre-punch fastener holes at standard corrugation valleys — this speeds up site installation and reduces on-site cutting waste. MOQ for custom lengths starts at 10 tonnes per colour and thickness combination.
| Parameter | Specification |
|---|---|
| Product Name | Brown Corrugated Metal Roofing Sheets |
| Thickness | 0.12 mm – 1.8 mm (bare metal, excluding coating) |
| Effective Width | 600 mm – 1500 mm |
| Length | Cut to order (typical maximum: 12 m for container loading) |
| Substrate | Hot-dip galvanized steel (GI) or aluminium-zinc alloy coated steel (GL/AZ) |
| Paint System | PE (polyester), SMP (silicone-modified polyester), HDP (high-durability polyester), PVDF (polyvinylidene fluoride) |
| Brown Colour Range | RAL 8001, 8003, 8007, 8008, 8015, 8016, 8017, 8023, 8024, 8025, 8028, 8029 |
| Processing | Fixed-length cutting, punching at corrugation valleys |
| MOQ | 10 tonnes (per colour and thickness) |
| Packaging | Standard export seaworthy packing with edge protectors and PE film interleaving |
| Delivery Terms | FOB, CFR, or CIF as agreed |
To achieve the best performance and weatherproofing, take note of these guidelines:
Note: Please consult with your project’s structural engineer to determine exact purlin spacing and fastening patterns required for your local wind and snow loads.
BOMIS can offer matched brown flashing, ridge caps, valley gutters, and closure strips in the same RAL color and paint system, as well. While they do serve as an option, most customers incorporate these elements to create a seamless look across the project. If the coating chemistry is compatible, alternatives from other suppliers can also be used. Please consult our technical team for compatibility if you decide to use another supplier.
A: The standard minimum order quantity is 10 tonnes per color and per thickness. Price breaks are available at 25, 50, and 100 tonnes. For trial orders which are under the minimum order quantity of 10 tonnes, the availability of stock is uncertain. Our sales desk can check the inventory for the most recent production runs.
A: Of course. We have 12 shades of RAL 8000 Series in stock. For orders of 25 tonnes or more, we will match other colors. This step will add an approximate 7-10 business days to production for us to create a sample and wait for the final approval. For the best color match, we will need a sample or RAL code. Please reach out to our sales team through sales@bomis.com for a custom color match and to request a lab sample.
A: We recommend a minimum of 25-micron dry film thickness of PVDF (polyvinylidene fluoride) topcoat on galvalume substrate for projects within 500 metres of salt water. PVDF systems are more resistant to salt spray and UV induced chalking and color fading than PE or SMP. Typically, for inland use, 20 micron of HDP (high-durability polyester) is adequate.
A: Mill test certificates (MTC) included with every order provide the substrate’s chemical composition and mechanical properties. Each order also includes a coating thickness report and a packing list with bundle tags. Third-party inspection (SGS, BV, Intertek) can be arranged on buyer’s account. We recommend this for first orders to gain confidence in the supply chain.
Sheets are layered with PE film, wrapped with edge protectors and placed in wooden crates or on steel pallets according to the handling infrastructure of the destination port. For destinations with high humidity during transit, VCI paper is placed in the bundle. It is common practice to share container loading photos prior to dispatch.
