Of course, having an open carport or detached garage is better for air. A home with an attached garage is usually a home in which people breathe more carbon monoxide (CO). The wall will be difficult to air seal because of the I-joists and the flex duct running through the cavity. If it’s not, then this may a possible reason for your garage slab to move, resulting in the gaps at the garage door bottom. This garage wall is part of the building enclosure. Since poor drainage near a homes foundation is one of the major causes for foundations and slabs to shift or move, it is important to check to see if your drainage is good. As part of your home maintenance program, check the rubber seals at the bottom of your garage door. This helps keep rodents and rain out, as well as, adjust for the unevenness of the concrete. Garage door manufactures realize this, so many of them put a rubber seal on the bottom of the garage door. Gaps at the bottom of garage doors are very common. Where there are expansive soils and they are pushing upward, the concrete slab will lift where it is the weakest, which in many cases is at the control joint Bottom Line One of the most common places to find a control joint in a garage is near the center of the garage or perpendicular to the center area of the garage door. Even with control joints, there will be gaps for the control joints only affects the cracking, not the settling or upward pressures on the concrete. Also, builders seldom ever get the control joints installed properly.
SEALING GAP BETWEEN GARAGE FLOOR AND WALL CRACK
However, concrete is dumb, so it doesn’t always crack at the control joints.
Many builders know this, so they put controls joints into the floor, so the concrete will crack at the control joints. A side effect of the slab movement is crackingĪ side effect of the concrete garage slab moving is that the concrete floor will usually crack.
Corner areas generally have less weight on the footing or slab, thus are more apt to shift or move. Should there only be a gap at one side of a garage door and not at the other, it will often be at the side of the garage door that is closet to a corner of the house, for this is where more movement may occur. Again, the most probably cause goes back to soil movement. Many homes may have a gap at one side of the garage door, but none at the other side.
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