pouring over an old slab
#1
02-17-10, 06:19 AM
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pouring over an old slab
I have some 29.2'x16" bar joist that I want to use to expand my old carport that was poured back in the late 70's. Slab is in good condition about 14x16. I want to expand the size (20x30) and do a complete pour over the old slab (to get more elevation). If I am understanding right, I need to prepare the area and put a vapor barrier over the whole pour area, including the old slab?
#2
02-17-10, 04:48 PM
Is that a studebaker hawk or a studebaker lark?
I don't know about the vapor barrier. What's more important is how much height do you want to add? As far as I know, you need to go at least 2 or 3 inches higher.
I don't know about the vapor barrier. What's more important is how much height do you want to add? As far as I know, you need to go at least 2 or 3 inches higher.
#3
02-19-10, 06:10 PM
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I think you would need the vapor barrier under the new addition for sure. If the old slab does not draw moisture to the surface now it probably does not need a vapor barrier under it.
But the plastic is cheap and it won't hurt anything for it to be over the old slab. I would put it under the whole thing and be sure you allow for proper drainage on the new addition.
But the plastic is cheap and it won't hurt anything for it to be over the old slab. I would put it under the whole thing and be sure you allow for proper drainage on the new addition.
