Gap Between Stucco Wall And Concrete

Use the flat finishing trowel to spread the stucco evenly across the surface.

Gap between stucco wall and concrete.

But you should not in any event seal off the gap behind the stucco as moisture will go through the surface and trapping it will only lead to more decay further up into the wall cavity. One big difference between the se two home exteriors is that when dry stucco is breathable it has tiny pores that allow water to evaporate from behind it so that moisture doesn t build up and cause rot. Stucco is made of these ingredients as well plus lime. In any case this is not a drainage style system.

The gap in question was previously filled with either fiberboard or concrete crack sealant but enough of it has deteriorated to conceivably allow moisture in. This first coat is known as the scratch coat this coat helps the final coat bond properly to the wall. In the course of repairs some of the caulk weatherstripping between the trim and the house came off. This will hopefully be the fix that keeps that wall of the sunroom nice and dry.

This prevents water from moving up and into the gaps between the sill and the cement wall it sits upon. Allow the scratch coat to harden slightly. Differences b etween concrete and stucco. Concrete is made of cement water and sand.

Stucco is cement fine sand and lime mixed with water into a paste that s spread over a surface. The gap between the wall and the trim is fairly large at least 1 2 inch. Apply the first coat of stucco to the concrete surface. The differences between stucco wall concrete wall stucco is breathable.

The scratch coat should be between 1 4 and 1 2 inch thick.