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bryanp22 03-16-2012 08:16 AM

Moisture on Garage wall
Yesterday I noticed a small section of the garage seemed to be wet on the foil wrapped insulation and on the 2x laying on top of the foundation. Outside I see river rock that the prior owner had put so it basically touches the bottom of the siding. Is it possible moisture gets from the rock and goes up into the insulation and wood? I raked away the rock and the dirt was moist but not super wet. My guess is water just must sit and then since the rock goes all the way up to the siding if it rains or anything it travels up into the framing and foil sided insulation. Does that sound right?

joecaption 03-16-2012 10:56 AM

Post a picture of the outside.
Siding never should have been any closer then 6" min of the grade.
Now water can wick up the sheathing, mold will set in, termites would be able to gain access and never be seen until it's to late.
That grade really needed to be slope away from the foundation and that building really needs gutters.

cibula11 03-16-2012 10:59 AM

My garage has the same issue. They ran masonite siding about 2" above grade. It is possible that the siding is wicking moisture from the rocks, but not likely. It would be more likely that the dew that settles on the siding is running down to the bottom and settling. Pics would help.

bryanp22 03-17-2012 05:29 PM

1 Attachment(s)
Here is a pictures. I raked some of the rock away as I thought that was the cause of the moisture initially

cibula11 03-17-2012 05:44 PM

Can you tell if the grade of your yard or pavers runs toward that side of the garage?

bryanp22 03-17-2012 05:48 PM

Pavers are pretty flat

cibula11 03-17-2012 07:57 PM

Is this on the north side? YOu might just want to clear the rock away and see what happens after a week of dry weather.

joecaption 03-17-2012 08:07 PM

May want to remove that lower row of siding to see what's going on.
I've got one I have to redo this coming week that looks just like yours.
The sheathing is black mold 2' up the wall and the bottom plate can be removed with a shovel.
There is an easy way to fix it but I'll wait until you find out if yours is also that bad.

bryanp22 03-17-2012 09:32 PM

Yeah this is the north side. I did start clearing the rock away from the part that seemed to be where most of the moisture is. What would people suggest for a fix?

Gary in WA 03-17-2012 11:25 PM

How are you able to see moisture on the foil-faced insulation? If the wall drywall is off, any moisture in the air will condense on the colder wall (first condensing surface) from a warmed garage or recently parked auto.


bryanp22 03-18-2012 08:47 AM

The garage is a detached building and has open studs

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