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Old 12-17-2008, 09:08 AM   #1
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House corner issues


Are the corners of houses at higher risk for environmental damage and leaks? I have been moving some stuff arround 2 rooms and notice the outside corners have mildew, moisture stains, some drywall tape peeling/splitting, and have cold spots. The drywall is still solid. A friend told me he has the same issue. Is this normal? Any ideas of a root cause? He thinks the insulation has shifted or got wet. From the outside, both houses look fine. Both houses have gutter down spouts on the corners.

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Old 12-17-2008, 09:27 AM   #2
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House corner issues


Not necessarily. It depends on the siding material and installation practices, as well as other leak points such as windows, doors, other penetrations, and roofs. If properly constructed, corners should be no more likely to leak than anything else.

Too little information about your home's specifics for me to tell you anything more than that.

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Old 12-17-2008, 09:46 AM   #3
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House corner issues


What questions do you have?
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Old 12-17-2008, 11:23 AM   #4
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House corner issues


1) Type of siding
2) Proximity to windows, doors
3) Proximity to wall penetrations
4) What sort of building paper, Tyvek, or other weather barrier was used under the siding?
5) Any corner trim boards of any kind?

Pictures would help greatly as well
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Old 12-17-2008, 12:42 PM   #5
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House corner issues


1) Type of siding
Vinyl
2) Proximity to windows, doors
Window on 1 wall in each room within 2 feet. Doors are internal
3) Proximity to wall penetrations
Only wall penetration would be the roof directly above and the gable venting withing approximatly 10 feet.
4) What sort of building paper, Tyvek, or other weather barrier was used under the siding?
The old aluminum siding was removed and the house was wrapped in some type of pink foam board about 8 years ago when the siding was replaced..
5) Any corner trim boards of any kind?
Externally there are vinyl corner trim on each corner.
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Old 12-17-2008, 02:28 PM   #6
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House corner issues


Mildew in corners and moisture stains may indicate lack of air exchange or not using exhaust fans in Bathrooms and Kitchen etc. May indicate excess humidity. A house I owned at one time had this problem, and
installing and using a bathroom exhaust fan, after showers solved my problem. Hope this helps.
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Old 12-18-2008, 05:28 PM   #7
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House corner issues


Certain corner framing construction will leave an open area that cannot be insulated after the house is sheathed. This area is prone to cold spots, especially in colder climates and in the North and East corners due to the lack of solar gain. Though it's not always restricted to those areas.
The warm air of a heated house can cause a condensate issue where it contacts the cold zone.
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Old 12-18-2008, 07:43 PM   #8
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House corner issues


Or the corner could have been improperly sealed before the vinyl siding was installed. Ice damming could be an issue, or normal rainwater flow could be.

There are two ways to find out what's happening.

-destructive measures...removal of siding or sheetrock, or both to get at the leak point.
-hire someone that has a thermal imaging camera to determine the leak point. Very good home inspectors are starting to use them more and more.

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