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Frosty wall

882 Views 6 Replies 5 Participants Last post by  Gary in WA
I am going to piggy back off this old post. I have attached an image of what is going on in my garage. It seems like the wall if more moist the further down you go. Is this something I need to worry about and get fixed?
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Got a picture of the outside of the house in that area.
Sure looks like you have some air leaks around your foundation plate and rim joist.
All that moisture is turning to mold.
I thought is might be easier to put the pictures as links instead of having a huge picture show up in the thread. So the link to the directory is here:

pic1.jpg: The outside of the house on the corner where the frost was building up on the inside of the garage. Where the cement ends is the ceiling of the garage, the master bedroom is directly above. I checked the downspout and it does not appear to be frozen full of ice. The frost also did not start until a couple days after we got all the snow you see on the ground. The snow is not very deep against the house, maybe an inch.

pic2.jpg: Just a close up of the last location.

pic3.jpg: A view of the corner of the house from the other side of the fence.

pic4.jpg: A close of of the wall, looks like some holes but they dont appear to be very deep.

Thanks for all your help!
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QUOTE: Waffer102 - I thought is might be easier to put the pictures as links instead of having a huge picture show up in the thread.
Good idea Waffer, thanks.

Now if we could get admn to delete the original pic so we don't have to turn the page , so to speak, to finish reading each sentence.
Basement/1st floor cantilevered area.

There is going to be a bunch of air flow from that area. You need to air seal that area ASAP and get it insulated.

There are several thread in the insulation section about how to best accomplish this. Rigid foam to the exterior (courtesy of my friend GBR) is the best way to air seal and thermally uncouple the framing from the exterior.

You need to stop the air movement and you are going to have to drop the ceiling or that exterior soffit to do it properly.

Pull down a couple of those pieces of soffit and you will see what I am talking about.
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Here's the link, fig.7;

Add foamboard to the rim with canned foam, foam the rigid board joints, caulk the joist bottoms before the plywood soffit install, caulk afterward to stop all air.

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