Pitched Roof Valley

In his latest consultant case study pitched roofing consultant john mercer focuses on tiled valleys and dispels some myths around mortar and offers some key guidance on an area that in his experience presents some of the most common causes of roof leakage in this next case study i turn my attention to tiled valleys.

Pitched roof valley.

Water collects in a valley to flow off the roof. A common misconception is that the mortar bedding is there to prevent water access. Woven closed cut and open. Valley tiles which allow the roof to be continued round corners they are special tiles which are the opposite of a hip tile really.

An open valley often 100mm or 150mm wide with a metal normally lead or sometimes a grp lining. It is an area where water is directed towards rather than away from therefore correct detailing and construction is essential. Our products have been sourced from leading manufacturers including manthorpe. A roof valley is formed where two roof slopes meet.

Shop from our range of grp valley troughs. Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. For example in an equal hip roof with an 8 12 pitch the pitch of the hip rafter would be 8 17. One of the areas of a pitched roof most prone to leakage if not constructed properly is the valley.

Essentially there are three main ways to shingle a roof valley. They can only be used when the pitches of the two roofs are identical. Made from glass reinforced plastic they are a strong long lasting and lightweight alternative to traditional lead and zinc valleys.