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Old 08-10-2014, 09:36 AM   #1
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Siding coming away from bottom of house, moisture, mold, how to fix???


Bought house with garage converted into bedroom. The siding is coming away from the bottom where foundation meets siding. Is this a simple fill in with spray insulation so no moisture can get in fix? Or not?
There was enough moisture coming through that insulation and drywall began to mold, and in winter frost was along the bottom of wall, which is now mold. We ripped all drywall and insulation out, but don't want this to happen again, so want to fix it right.

Thanks for any suggestions in advance!!!
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Last edited by hyped84; 08-10-2014 at 10:00 AM.
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Old 08-10-2014, 09:38 AM   #2
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Siding coming away from bottom of house, moisture, mold, how to fix???


This is a view of bottom of siding outside
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Last edited by hyped84; 08-10-2014 at 09:59 AM.
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Old 08-10-2014, 09:40 AM   #3
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Siding coming away from bottom of house, moisture, mold, how to fix???


Here is a photo of type of siding
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Old 08-10-2014, 09:55 AM   #4
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Siding coming away from bottom of house, moisture, mold, how to fix???


Hard to tell what type siding that is.
Could be aluminum or Masonite?
Can not tell what I'm look at in that last picture, is that siding or concrete touching the grade?
If that wall was built so it set back from the concrete and the siding was not run past the slab or stem wall that's your issue.
The right way to fix it would be to remove that bottom row of siding and add aluminum flashing formed to fit at least 6" up the wall and out over the slab and bent down by at least 2".
Needs to be fixed outside not inside.
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Old 08-10-2014, 09:58 AM   #5
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Siding coming away from bottom of house, moisture, mold, how to fix???


A fiber board siding.
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Old 08-10-2014, 10:08 AM   #6
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Siding coming away from bottom of house, moisture, mold, how to fix???


Probably would have helped if the original carpenter had hit the sill plate with his nails along the bottom of first pic.

Might be as simple as pulling off the bottom row or two and securing that sheathing so there's no gap at the bottom to allow weather, bugs, etc. into the house.

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Old 08-10-2014, 10:29 AM   #7
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Siding coming away from bottom of house, moisture, mold, how to fix???


I pulled the corner piece off, here is a side view of layers over the concrete slab.
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Old 08-10-2014, 11:53 AM   #8
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Siding coming away from bottom of house, moisture, mold, how to fix???


On the plus side, there doesn't appear to be any rot or at least there is minimal rot. I can't speak to the flashing, perhaps Joe Caption can comment on it. There is some flashing there, but, I can't tell if it is done correctly. Joe, you out there?

Most important of all, did you take care of the mold situation? My guess is that the sheathing wasn't nailed to the sill in that area. Since the siding is so close to grade, it was easy for moisture to wick up into that spot and get into the wall. Imagine rain, snow, etc. having its way in that spot. It also may be a good time to make sure the soil is graded AWAY from the foundation of that converted garage which would insure that no moisture makes its way up into the wall cavity again.

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Old 08-10-2014, 12:14 PM   #9
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Siding coming away from bottom of house, moisture, mold, how to fix???


That's some funky flashing, looks like they bent it trying to use it as the kicker at the bottom.
Useless the way it is.
Remove that bottom row of siding, easiest way is with a long bimetal fine toothed blade and a sawsall.
Remove that strip of flashing, nail the sheathing back in place with ring shanked 8D nails.
The next step would be determined by how the siding sits against the bottom plate once the sheathing nail in place.

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