UV Stable RAL 8017 Color Coated Steel Coil Dark Brown Roof Cladding

UV Stable RAL 8017 Color Coated Steel Coil Dark Brown Roof Cladding

Dark roof colors look sharp on a finished building and punish the coating while getting there. A RAL 8017 chocolate brown surface can reach surface temperatures twenty to thirty degrees above a light grey panel under the same sun, and that thermal load accelerates resin degradation. This coil answers that with a UV stable coating system and an optional infrared reflective pigment package that lowers the surface temperature without changing the visible shade.

The reflective option is worth understanding before ordering: standard RAL 8017 and heat reflective RAL 8017 look identical to the eye but behave differently on the roof, and the reflective version usually pays for itself in reduced cooling load on large industrial roofs.

Technical Data

Why Dark Roofs Need a Different Coating

• Higher surface temperature speeds up resin breakdown, so UV stabilization is not optional here.
• Reflective pigments keep the same brown appearance while lowering peak surface temperature.
• Lower gloss reduces the uneven blotchy look that dark panels show when they expand in sun.
• Thicker film build covers the substrate pattern that becomes visible on dark shades.
• Colour consistency across batches matters more on large dark roofs, so dE is measured every run.

Typical Installations

• Industrial warehouse roofs in warm climates
• Agricultural buildings and storage sheds
• Residential estate roofing with dark architectural styling
• Commercial rooftops where cooling load is a design factor

Frequently Asked Questions

How much cooler is the reflective version?

Measured surface temperature typically drops 8 to 12 degrees Celsius at peak sun compared with the standard version of the same shade. Actual figures depend on insulation, roof pitch and ventilation, so we quote a range rather than a single number.

Will the brown fade faster than a light color?

Dark shades show chalking differently because the contrast is lower, but they degrade faster in absolute terms. The UV stable package is what keeps RAL 8017 within the agreed dE window for the warranty period.

Can you match an existing roof we need to extend?

Send a physical sample or the original RAL code and year of installation. We measure the aged panel and adjust the batch tint so the extension blends rather than sitting visibly darker next to weathered material.

Is a matte finish available?

Yes. A matte top coat is common on dark architectural roofs because it hides panel waviness and reduces glare from neighbouring buildings.

Packing and Delivery Notes

Coils are wrapped in PVC film with paper interleaving, strapped on wooden pallets and labelled with heat number, coating batch and gloss reading. For dark shades we add an outer paper wrap that reduces heat build up inside the container during summer transit, which is a common cause of surface marking on brown and black coils arriving after a long sea voyage.

Coating thickness matters more than coating brand in service: Top 22 - 25 micron, primer 5 micron. Below roughly 20 micron total build, UV exposure in strong sun starts to chalk the surface within a few years, and the colour drifts before the steel itself shows any problem.

Formability is specified as T bend 2T without cracking. This determines whether the strip can be roll formed and folded at the job site without cracking the coating over the bend radius, which is the most common cause of premature coating failure on roofing panels.