Should Roof Valleys Be Pointed

Roof valleys are troughs that discard runoff water where two sections of sloped roof meet. So when it is time to have your ridge capping repointed on your tiled roof take a good look at the valleys. 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.

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I suspect it has never been done properly each of the 3 times it has been pointed.

Should roof valleys be pointed.

Nrca lile points out that woven roof valleys are limited to cutout style 3 tab asphalt roof shingles as there are no openings to weave solid or architectural or dimensional or laminate style asphalt shingles together and he adds that the valley s slope should be at least 4 in 12 or steeper installed typically over a layer of mineral granule faced roll roofing. Never try and work on a roof from a ladder as a. 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. The upstands will prevent water ingress even if the mortar is missing or damaged.

Then it has to be reinstated after the valley change. I had my roof retiled about 6 years ago. After about a year the pointing from one of the valleys fell out. 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.

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 had it repointed but it fell out again after another year. This video shows how to repoint a lead roof valley. A scaffold tower has been used for access in this video.

Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies. To achieve a woven valley installation a roofing professional lays shingles in the valley and weaves them together. Nevertheless they are often omitted from lead valleys. To change a valley on a tiled roof the ridge capping at the top of the valley has to be removed.

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 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 had it repointed again in october 2014 and it has fallen out again from under the roof tiles.

The valleys on many older houses comprise layers of roofing paper which can deteriorate over time.