No Plastic Under Concrete Slab

Recently though research has shown that the old traditional layer of 6 mil visqueen polyethylene plastic under the slab is seldom effective for two main reasons. One laboratory drying study indicated that 4 in. This plastic sheet is in direct contact with the concrete as it should be in a rational world.

one month old baby birthday ideas one month old baby photo ideas one room studio apartment decorating ideas one bedroom apartments in mandeville jamaica nutone bathroom ceiling heater fan light off lease heavy equipment for sale no more gutter cleaning old navy family christmas pajamas canada

Footing Slab Foam Plastic Detail Exterior Insulation Building Foundation Waterproofing Basement

Slab Foundations Concrete Slab Foundation Slab Foundation Concrete Pad

Bsi 082 Walking The Plank Building Science Corporation Walking The Plank Concrete Slab Foundation Plastic Sheets

Carpeting Or Tiling A Basement Concrete Floor Issues And Products To Consider Concrete Floors Flooring Concrete

Build Your Shed On A Concrete Slab Concrete Sheds Building A Shed Shed Construction

Bsd 012 Moisture Control For New Residential Buildings Construction Details Architecture Building Foundation Residential Building

It then reacts with the cement and soaks back into the concrete within an hour or two helping to complete the curing process.

No plastic under concrete slab.

This water can take literally years to dry out through the top of the concrete slab. The rate that moisture escapes from a slab depends on the concrete w c the density of the finish the ambient conditions above the slab and the moisture below the slab. Why do concrete slabs need black plastic membranes under them. The other contractor says no way no plastic holds the water in the concrete during the drying process and can leave webbing like visual affect in finish of concrete.

One contractor says to put plastic under the concrete it prevents moisture from coming up into the concrete. The structural why fil. Almost everywhere except california that slabs are placed on the ground a plastic sheet a vapor barrier is located directly under the concrete slab and on top of the ground photograph 1. In fact most professional shed slab builders will install a polyethylene membrane under a shed concrete slab even if it is not specified.

So it is common to use crushed stones with no fines as a capillary break and then add a plastic sheet over the top of the stones in contact with the concrete as a vapor barrier. A concrete vapor barrier is simply a sheet of polyethylene plastic visqueen placed directly on top of the sub grade before the concrete floor or slab is poured to help keep moisture from the soil from passing up through the concrete. So why not just use plastic and not stones. If the plastic is right under the concrete the bleed water is forced to rise to the surface.

Or just use the plastic sheet to do both be the vapor barrier and the capillary break. Thick concrete samples having a w c 0 50 and sealed from below required 82 days for the vapor emission rate to reach 3 0. The reason is that the vapour barrier stops moisture from the wet concrete escaping into the ground under the concrete. What is a vapour barrier under a concrete slab and why do you need one.

Although it may seem water tight this grade of material allows a lot of water vapor to pass through.

Pin On Diy Home Decor

Best Way To Remove Concrete Slabs On A Patio Concrete Slab Patio Concrete Slab Concrete Driveways

Deck O Seal Pool Deck System Concrete Patio Yard Drainage Backyard Patio

Pin On Our Garden

Source : pinterest.com