Roof Counter Batten Spacing

For example 25x50mm battens should be used for single lap modern roof tiles when laid on rafters with a 600mm span.

Roof counter batten spacing. Hold a final short strip of batten across the top of the roof just below the ridge and rest a tile on it. Lay one layer of undertile membrane to sans 952 6 or agrément approved over the counterbattens with a minimum horizontal lap of 200mm and a vertical lap of 200mm. The batten should be positioned so that a ridge tile will overlap the roof tile by roughly 3 inches. Battens should be fixed to rafters set at centres not more than 600mm apart.

According to bs 5534 the appropriate batten size will depend on the span of the rafters and the roof covering. The felt is then overlaid with well fixed 38mm x 19mm timber counterbattens to sans 1783 5 at spacings to suit the rafters. The spacing of the battens depend on the type of roofing material and are applied horizontally. If your tiles are laid without counter battens rainwater could pass between the tiles and get stuck behind the tiling batten building up a pool of water over time.

Here are some guidelines to bear in mind. Horizontal battens should also be installed so that there is a clearance of at least 6 inches between the batten and the valley to allow concentrated water flow. The spacing of the roof battening highly depends on the type of exterior roofing material that is going to be used. For example metal roofing will be attached to special metal roof battens.

Your choice of batten size here will be determined by the weight and span of your metal roof panels. Vertical battens are referred to as. Drag the centres or total length slider to see the effect of double end members. Mark out with exact spacing if the 2nd to last member runs into the end member the 2 end members combine double members.

For example 25 x 50mm battens are required for single lap modern roof tiles laid on rafters with a 600mm span. Underneath these battens you will find your counter battens running vertically and beneath these a breather membrane. Each product has different requirements for example batten spacing for 0 42bmt corrugated metal roofing needs to be no more than 1100 mm apart but batten spacing for 0 48bmt metal roofing can be up to 1600 mm apart. With equal spacing centres are adjusted to fit.

The updated bs 5334 code of practice for slating and tiling specifies a number of batten sizes based upon the span of the rafters and the product being used. Roof tiles are usually laid horizontally attached to timber tiling battens.