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.
Roof leaking into cavity wall.
On the front west side.
11 jan 2007 messages.
Rustlehobs 24 dec 2015 in forum.
If you go into your ceiling cavity and you can see the underside of the roof tiles.
The solution is to re grout and reseal the tile.
The back east side of the roof is a shed dormer for most of the length of the house.
The leaks tend to be located under or near windows skylights and along the transition to an attached garage where there is step flashing.
Leaking into wall cavity.
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.
Wall flashing roof wall flashing errors and causes of leaks and roof wall intersection flashing to prevent leaks or water damage.
Rustlehobs 24 dec 2015.
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.
Wall cavities affected by water damage are vulnerable to mold growth which also has a pungent musty odor.
Mold on walls and baseboards.
New garage roof leaking at main house wall.
Discussion in roofing and guttering started by cobson 11 jan 2007.
Roof tiles start to do poorly when the roof pitch gets less than 20 degrees.