Sometimes misspelt firring these are professionally cut sections of timber that allow you to form a gradient or slope on projects such as flat roofs. The gradient created assists with rain or water run off from the surface and are a tapered timber sloping from the width of the timber section to the diametric opposite corner forming a right angle triangle timber in a selection of lengths.Tally lengths requested will only be supplied when available from stock, or the equivalent meter run will be supplied Key Features 47 x 75 mm Timber Furring Strip to create gradient 75mm to 0 mm The gradient created by these sections assists with rain or water runoff from the surface. These timbers are tapered, sloping from the width of the timber section to the diametric opposite corner, forming a right-angle triangle.