Waterproofing siding on slab


Old 09-08-19, 04:25 PM
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Waterproofing siding on slab

On my house I have masonite garbage siding sitting directly on a wood frame and all of this touches the slab. This isn't the house but the back patio. Since all of this is rotting I need to replace. Im looking for ideas on what to do towards the bottom where the concrete is.so water wont destroy this again. The rest of the house is masonite as well but it's still in good shape.
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Old 09-08-19, 04:31 PM
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You need to lay a metal flashing (such as a drip cap, shaped like an L) on top of a heavy bead of concrete polyurethane sealant that you put on the concrete. Then keep the siding at least 1-2" above that. It's not ideal, but it's about all you can do.
Old 09-09-19, 05:47 AM
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Got a picture so we can see what your seeing?
Old 09-09-19, 12:25 PM
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How high is top of slab above grade?
Old 09-11-19, 08:05 AM
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The slab doesnt sit high. It wasnt originally designed for this application. So the house sits 6 or so inches higher than this
Old 09-15-19, 08:34 AM
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As others have said pictures would be useful.

If I understand this correctly the house foundation is 6 inches higher than the slab with the siding going all the way down to the slab.
I would rip the siding off between the foundation top and the slab and leave it off.
It is a good idea to have the siding drop an inch or so below the foundation's top
The masonite can act as a wick and pull moisture up eventually rotting the bottom plate of the house walls.
Hopefully this has not happened.

A flashing should then be installed and calked under the bottom of the siding.
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