Treated Timber Firring 4 – 0 – 4.8m

Our Treated Timber Firring Pieces (4-0 profile, 4.8m length) are an essential solution for creating accurate roof falls and achieving precise drainage gradients on flat and low-pitch roofing systems. Pressure-treated with preservative to protect against rot, fungal decay, and insect attack, these firring pieces are engineered for long-term performance in exposed and structural applications. The tapered profile — running from 4mm at the thin end to 0mm — delivers a consistent, reliable fall across the roof deck, ensuring efficient water run-off and helping to prevent pooling that can lead to costly structural damage. Cut from high-quality structural softwood and kiln-dried prior to treatment, each piece offers excellent dimensional stability and strength, making them straightforward to fix and cut on site. Suitable for use with a wide range of flat roof systems including built-up felt, single-ply membranes, and green roofing applications. Compatible with joists and flat roof decking boards, these firring pieces integrate seamlessly into new-build and refurbishment projects alike. At 4.8 metres in length, they offer generous coverage, reducing the number of joints required and speeding up installation. Ideal for roofing contractors, builders, and competent DIYers looking for a reliable, code-compliant roofing component.