Treated Timber Firring 4 – 0 – 4.2m

Our Treated Timber Firring Pieces are the ideal solution for creating accurate roof falls and achieving precise drainage gradients on flat and low-pitched roofing projects. Cut from high-quality structural timber and pressure-treated for enhanced durability, these firring pieces taper from 4mm to 0mm over a 4.2 metre length, providing a consistent and reliable slope to direct water efficiently away from the roof surface and towards drainage points. The pressure treatment process deeply penetrates the timber fibres, offering robust protection against rot, decay, fungal attack, and insect infestation — ensuring long-lasting performance even in exposed outdoor conditions. Designed for use with flat roof joists and decking systems, these firring pieces are widely used by professional roofers, contractors, and self-builders alike. Their precise taper eliminates the need for on-site cutting or adjustment, saving valuable installation time and ensuring compliance with building regulations for minimum roof drainage gradients. Lightweight yet strong, they are easy to handle and fix directly to existing joists using standard fixings. Compatible with a wide range of flat roof constructions including warm roof, cold roof, and inverted roof build-ups, these treated timber firrings are a dependable and cost-effective component for any roofing project.