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.

Gap between stucco wall and concrete.

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

The differences between stucco wall concrete wall stucco is breathable. This first coat is known as the scratch coat this coat helps the final coat bond properly to the wall. A stucco wall is decorative but stucco itself has no strength and cannot support any weight. Stucco is cement fine sand and lime mixed with water into a paste that s spread over a surface.

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. The gap between the wall and the trim is fairly large at least 1 2 inch. Allow the scratch coat to harden slightly. 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.

In any case this is not a drainage style system. To remedy this issue i installed backer rod in the gap that i then covered with concrete crack sealant. I have a stucco sided house that i am repairing repainting. In the course of repairs some of the caulk weatherstripping between the trim and the house came off.

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