Roof Valley Pointing

Using clips permits movement in the valley as temperatures change.

Roof valley pointing.

A scaffold tower has been used for access in this video. Essentially there are three main ways to shingle a roof valley. Never try and work on a roof from a ladder as a. I have loose mortar to two valleys either side of a gable built as an extension eight years ago.

Use roof valley cleats at intervals of 24 o c. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. A roof valley is very prone to leaks especially if you have an older roof. The reason why the roof valley is such a sensitive area has to do with all the rainwater and or melting snow that accumulates and flows through the valley on its way into the gutters.

Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. The installer fabricates simple clips or valley flashing cleats whose bent edge interlocks with the folded over or hemmed edges of the metal roof valley flashing to secure the valley to the roof deck. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. This video shows how to repoint a lead roof valley.

A roof valley is formed where two roof slopes meet. This is how i cement roof tiles pointing the verge in with two coats of cement the cement i use has black dye mix in it to help match the roof tiles in colo. The original roof ridges and pointing built 1990 are fine but the pointing in the more recent valleys is crumbling and falling into gutters. Water collects in a valley to flow off the roof.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. 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. After about a year the pointing from one of the valleys fell out. I suspect it has never been done properly each of the 3 times it has been pointed.

I had it repointed again in october 2014 and it has fallen out again from under the roof tiles. I had it repointed but it fell out again after another year.