Should Roof Valleys Be Pointed

To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together.

Should roof valleys be pointed.

I had my roof retiled about 6 years ago. So when it is time to have your ridge capping repointed on your tiled roof take a good look at the valleys. The upstands or tilting fillets at each side of the valley are an important feature of good valley construction as they keep the water within the centre area of the valley. I suspect it has never been done properly each of the 3 times it has been pointed.

To change a valley on a tiled roof the ridge capping at the top of the valley has to be removed. Then it has to be reinstated after the valley change. After about a year the pointing from one of the valleys fell out. Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.

But if the shingles are not laid in the valley properly a woven valley may not lay flat creating bumps and detracting from the overall look of the roof. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. I had it repointed again in october 2014 and it has fallen out again from under the roof tiles. Nevertheless they are often omitted from lead valleys.

A house with an l shaped or t shaped footprint for example always will have roof valleys where the two sections of the house meet. Some homeowners prefer the consistent look that a woven valley provides. The valleys on many older houses comprise layers of roofing paper which can deteriorate over time. A scaffold tower has been used for access in this video.

The upstands will prevent water ingress even if the mortar is missing or damaged. To shingle out of the valley with laminated shingles lay a shingle down as a gauge and mark the corner at the bottom left and top right of the roof. I mark the shingle where the valley center crosses the top edge and i mark the roof at the top outside corner of the shingle. Never try and work on a roof from a ladder as a.

This video shows how to repoint a lead roof valley.