Roof Leak Where Siding Wall Meets Roof Line

Rotten or missing trim or siding can allow water to leak behind flashing and into your roof.

Roof leak where siding wall meets roof line. It appears a roof valley ends at the rainwater collector box tight against the side wall of the house. You can crack roofing if you walk on it so be careful. Of that is the case its an unwise roof design to begin with. Instead of a standard straight cut you must cut these pieces of siding at the same angle as the roof.

Proper roof wall abutment flashing examples. Vertical leaks saturated the insulation inside the walls and the water cascaded over the several layers of floor levels on the 2 story to bi level intersections. Then there is the transition of the. Worn out flashing or missing sealant can also cause roof leaks around dormers.

Other materials such as slate concrete tile or clay tile may not be so forgiving. The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall. One of the first questions we ask is have you had your home resided is the past few years. Because the wall is some kind of solid wood metal flashing should have been installed under the shingles and up the face of the wood wall into a groove in the wood.

This is exactly what happened as the run off from the roof traveled behind the siding and through a layer of rigid insulation and a layer of wall sheathing. It is not good practice to install flashing or bring the membrane up behind the vinyl siding. When installing a flat roof flashing against a wall is critical. I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof.

This means the expanse of shingles slate shakes whatever. Dormer leaks can be caused from a number of issues. Below are two photographs of roof wall step flashing completed and effective of a slate roof against a brick wall below left and in process with step flashing against a dormer sidewall before the dormer siding has been put in place below right. If your roof is asphalt then you can walk around with ease.

If your roof is older it is possible that the leak is within the roof field. A roof leak at the edge of a dormer can allow a lot of water to enter your home.