I have a client who wants to get rid of her masonite lap siding and replace it with stucco. There is a small amount of sun damage annd dry rot on one wall but the majority is in good condition. My stucco guy wants me to repair the damaged areas , re-nail the whole thing and stucco over the top of the siding. ANy reason to be concerned???
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ANy reason to be concerned???
Stuccoing over masonite sounds about like putting maple syrup on a turd to me. The whole problem with that stuff is it's amazing ability to suck up water. How's the stucco gonna react when rot, termites, and ants disolve the substrate behind it?
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"he ot the placed closed down whyyy thhhattt nnooo gooodddd" - sancho
Properly detailing the openings is one good reason for concern. Before you cover a 10-year siding with a 50-year stucco job, you really want to ensure that the flashings, etc around the building openings are up to the task.
My vote is to demo the siding and do it right.
Bill
Where? Not a good idea in most of the US. Might work out OK in the relatively arid Southwest.
If some of the siding has gone punk it's only a matter of time for the rest. If it swells it'll damage the stucco on top of it. Plus it's not especially rigid.
But I suppose it depends somewhat on the technique used. Ignoring the problems due to the additional thickness, I guess you could put up felt, then metal lath, then stucco. The stucco wouldn't really be in contact with the hardboard. Certainly this sort of thing is done all the time in commercial work, but most commercial work is only designed to last 10-20 years.
If this makes a difference..... the rest of the house has stucco with ridgid foam underneath. The new will also have the foam.