Too much purposeful vibration could cause cracking or movement in the fresh concrete foundation, leading to serious structural problems. Since the floor is poured not that long after the garage grade beams, builders are often reluctant to bring in heavy compaction equipment to ensure this base is really solid. For a garage floor slab there should be a well compacted granular layer beneath the concrete, but that is often not the case. This is done to allow for the garage floor to move, somewhat, without affecting these foundation walls.Īnyone who has owned a home in our area knows about the amount of potential movement in concrete slabs poured on grade, due to our expansive clay soil.
#FILLING GAP BETWEEN CONCRETE SLAB AND WALL INSTALL#
The garage floor, however, is often the last component to install and is not often attached to the deep house foundation wall or the grade beams. These short foundation walls are normally supported by poured concrete piers, which extend far deeper into the soil, to prevent movement. Filling the gap in is a good idea, as long as you use a flexible sealant that will allow further movement to occur without causing any other problems.Īttached garages are typically built with short foundation walls, known as grade beams, supporting the exterior walls, other than the one under the main house wall. I don’t have anyone to ask and I’m concerned.Īnswer: A small gap between the concrete garage floor slab and the house foundation is normal, as they are adjacent but not typically connected. Should I pour in something to fill it, or is the floor not supposed to be attached to the wall? Is this normal? What is in this gap? I don’t want there to be any chance that an animal could get in. I ask because I can see a small gap in the garage floor, near the house foundation, where the concrete is slightly pulling away, just a little. Question: How is the garage floor attached to the house walls, or is it not? Is there a thin space between them? What material is the outside of the house made of, where is touches the garage floor?
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