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Geolift works in three steps.
Spray foam over concrete floor. So how do you raise a concrete slab with foam. The first step is to drill holes in the problem concrete. Or as demonstrated here you can cover the slab with rigid foam insulation add two layers of plywood and then add the finish flooring. Foam over a concrete floor tim brown posted in general questions on june 29 2015 09 11am i plan 4 6 inches of eps under the slab and now am considering an inch of either eps or xps on top with 5 8 or 3 4 tongue and groove plywood or osb to provide a nicer floor to walk on as well as a warmer floor in the walk out basement.
Spray foam really is a magical tool for household insulation. Shore up concrete problems. Locate the dips get the right equipment and foam. Although fiberglass has been commonly used for insulation spray foam can actually outperform it plus with so many ways you can use spray foam this material certainly is handy now only if it could help us out with all of those concrete problems.
Lay a continuous layer of 1 4 inch foam gasket or similar moisture and air barrier on top of the concrete slab before applying sill plates. Use 5 8 inch masonry bi t to drill a hole through the concrete and spray the foam into it. Geolift works for driveways sidewalks patios garage floors even pool decks. A crawl space with a concrete floor and no water problems may only need foundation wall insulation and a crawl space dehumidifier conditioned air or both depending on if there is an vapor barrier installed under the concrete floor.
You can use either one or two layers of plywood or osb and the subflooring can either be fastened to the concrete with long tapcon screws or it can simply float above the foam. You can attach wood sleepers to the floor fill the gaps with rigid foam insulation and then apply your finish flooring. There are two ways to handle insulating concrete floors. Can you not apply spray foam insulation to the concrete walls from the crawlspace floor up to floor and apply a thick vapor barrier on the floor and seal it to the bottom of the spray foam on the concrete wall.
If your basement slab lacks sub slab foam you ll have to install the insulation above the slab. Shell busey shows you how to insulate a concrete floor. However moisture intrusion can increase over a period of years as new development pushes water into older areas. And yes it is a foam just like your beloved spray foam.
Determine if you need conditioned air a dehumidifier or both add conditioned air if you have problems with. Geolift can help to lift existing concrete surfaces and fix those problem areas around your house with much less labor.
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