Roof Valley Pointing

This video shows how to repoint a lead roof valley.

Roof valley pointing.

Never try and work on a roof from a ladder as a. Using clips permits movement in the valley as temperatures change. Use roof valley cleats at intervals of 24 o c. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.

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. 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. 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 but it fell out again after another year.

A roof valley is formed where two roof slopes meet. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. 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. I have loose mortar to two valleys either side of a gable built as an extension eight years ago.

Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. I suspect it has never been done properly each of the 3 times it has been pointed. After about a year the pointing from one of the valleys fell out. A scaffold tower has been used for access in this video.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. I had it repointed again in october 2014 and it has fallen out again from under the roof tiles. Woven closed cut and open. Essentially there are three main ways to shingle a roof valley.

The original roof ridges and pointing built 1990 are fine but the pointing in the more recent valleys is crumbling and falling into gutters. 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.