Hardiboard mold

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Old 07-01-17, 11:58 AM
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Hardiboard mold

Help please. We bought a house out in the country with a shop on a slab. It has hardiboard siding nailed directly to studs with no housewrap. Previous owner had hodgepodge of interior plywood coverings. We want to remove those and insulate. Bad news. There are mold spots all along the bottom where moisture has gotten in. How can we fix this without starting all over on a 30 x 50 building? Can we spray that yellow foam along the bottom exterior and interior to keep moisture from creeping in???
 
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Old 07-01-17, 09:01 PM
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Sounds like removing the siding is the first step.
 
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Old 07-02-17, 04:11 AM
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How high above the grade is the slab? If the dirt is right at the bottom of the siding that is asking for moisture/mold problems.

btw - welcome to the forums!
 
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Old 07-02-17, 07:35 AM
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Post a picture of the outside, no close ups needed.
As marksr suggest we need to see how close to grade it is, see if there's a roof overhang, gutters, if grade runs away from the building.
 
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Old 07-02-17, 11:43 AM
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Good point. In many areas, there is a lot of visible slab showing. In others, it is probably too close to the siding.
 
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Old 07-02-17, 11:47 AM
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Please don't say that. We already are remodeling the house, didnt want a big investment to the shop.
 
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Old 07-02-17, 11:56 AM
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Old 07-02-17, 06:50 PM
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No WRB (against code and mfg installation instructions) and closer than 6" to grade (also against mfg) and should have been painted soon after installation.
 
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Old 07-05-17, 07:05 AM
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I know that this was not constructed correctly. But, now that we are trying to make this work, are there steps we can take that don't involve tearing it all down? Can we 1) make sure that the soil is well away from the bottom of the siding. 2) kill the mold that is visible 3) apply something to the inside that would provide a barrier so that mold doesnt come back 3) caulk and paint the outside and inside before we put insulation and pegboard inside. I have seen people use a product on their basement walls to prevent moisture from coming in. Can't we do the same with these walls?
 
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