Firring Strips

Firring strips are tapered lengths of timber that are often installed when a flat roof is being repaired. Firrings are installed under the roof covering to create a gradient; allowing water to drain from the roof. Timber firrings are fixed to the roof rafters and then boarded over with a sheet material, such as tongue & groove OSB (oriented strand board).

At Bendrey Bros, we cut firring strips to order. Roofs come in all shapes and sizes, we'll cut the right size of firrings for your project. Typical lead time is 1-2 days, possibly sooner if required.

Firring strips are cut from 45mm thick carcassing timber as standard, they taper from a wide end (e.g. 70mm) down to nothing (0mm). We recommend that firring strips are produced with a minimum gradient of 1 degree to allow water to drain freely. Most firring sizes will be supplied in two pieces that join in the middle, short firrings may be supplied in one piece, extra-long firrings may be supplied in more than two pieces.

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The list below shows maximum firring strip lengths based on common firring dimensions with no less than a 1 degree fall:

All sizes are cut to order & bespoke, we can produce almost any size of firring that you may need.

Contact us for prices & availability. Collect from our yard in Bristol (BS30 5JW), delivery service available.