Slate Roof Valley Detail

Thin plywood linings are fitted over the valley boards to maintain a smooth finish under a lead lined valley.

Slate roof valley detail.

Effective design of a slate roof must take into account a number of inter related factors including site exposure the pitch of the roof the type of slate selected and the slate lap. We are often asked by designers architects home and building owners what will a slate roof cost me. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. On average north american produced s 1 rated roofing slate will cost 400 600 usd per square 100 square feet or 4 00 to 6.

Roof valley flashing specifications and details roof valley flashing specifications for asphalt shingle roofs open roof valley flashing installation details closed cut roof valley flashing installation details woven roof valley flashing installation details. Slate versions are seen in wales aa well as the half swept or single cut. Full application and sitework details are given on pages 8 to 22. The cant strip can also be constructed as shown in detail 9 5d the shingles or slate must lap the flashing at least 6.

The detail shows a typical open valley flashing for a shingle or slate roof. Valleys are a very important part of a well designed roofing system. Table 11 gives the minimum recommended valley widths for different roof pitches and plan areas. In the east midlands where collyweston limestone slates are produced the laced valley is the normal detail.

But because the slaters produced their own slates and traveled with them to wherever collyweston slates were specified the laced valley went too. These items can be fabricated in many different profiles. Two different cants are illustrated. The width of the open valley is dependent upon the roof pitch and the volume of water expected to drain into the gutter.

This video shows how to cut valley slates in a fast accurate and professional manner.