Roof Leaking Into Cavity Wall

Wall flashing roof wall flashing errors and causes of leaks and roof wall intersection flashing to prevent leaks or water damage. The back east side of the roof is a shed dormer for most of the length of the house. If you go into your ceiling cavity and you can see the underside of the roof tiles.

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Wall cavities affected by water damage are vulnerable to mold growth which also has a pungent musty odor.

Roof leaking into cavity wall.

Roof is roughly 12 12 pitch with kneewall height of about 40 in. 11 jan 2007 messages. The leaks tend to be located under or near windows skylights and along the transition to an attached garage where there is step flashing. Leaks on tile roofs only when it rains heavy no sarking under the roof tiles.

If tile grout has broken down water may be entering the wall through cracks between tiles allowing a small amount of water to enter the wall cavity and drain down to the ceiling below. Rustlehobs 24 dec 2015. Roof tiles start to do poorly when the roof pitch gets less than 20 degrees. Low pitched roof tiles.

New garage roof leaking at main house wall. Leaking into wall cavity. Mold on walls and baseboards. On the front west side.

Discussion in roofing and guttering started by cobson 11 jan 2007. Rustlehobs 24 dec 2015 in forum. The solution is to re grout and reseal the tile. Points out the white caulk that was installed as a stopgap measure where the builder has installed a bay window into a stuccoed wall without proper roof wall flashing red arrow.

If there is a strong musty smell near a certain area of your wall there could be a water leak or mold growth behind it.

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