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Old 10-25-2011, 08:41 PM   #1
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Window Problems?

Is this damage from the windows? If so, how would I fix it?

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Old 10-25-2011, 11:44 PM   #2
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The damage appears to occurr above and below the windows so my impression is that the windows are not the source of the problem. Water is penetrating the masonry and driving the paint off the masonry. Is this wall solid masonry or is it a cavity wall?

If the wall is solid masonry it is very difficult to prevent this problem. Moisture finding its into the wall will migrate to the drier side which is typically the interior. If the interior surface is painted, the moisture will push off the paint as it migrates and reaches the interior surface. The best control is to not paint the interior surface or to use a pourous non sealing paint.

A proper masonry wall includes a 1" to 2" air cavity that is waterproofed at the interior surface. Moisture is expected (but not encouraged) to penetrate the exterior wythe but is stopped at the dampproofed surface of the interior wythe and weeped back to the exterior. Cavitywall masonry construction can be painted at the interior surface because the moisture level in the brick is stable and, for all practical purposes, does not migrate.

Regardless of the wall construction I suspect that the exterior surface of your wall is not protected from rain by a substantial eave or roof overhang.

One solution for your wall is to remove the paint from the interior wall surface. If you still want paint, use a non sealing paint that permits water vapor to pass, but not liquid water. Also investigate the exterior surfaces for possible sources of water penetration and correct.



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Old 10-26-2011, 05:24 AM   #3
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Post some pictures from the outside.
A Picture Is Worth A Thousand Words
Especially In The DIY Chatroom
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Old 10-26-2011, 07:11 AM   #4
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Very common in this type of construction.

What does the roof look like? Leaks in this application are most often found above the window where the water enters the masonry and flows behind the wall.
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