Levelling cabinets in Austin houses that move with the clay

Lay a six-foot level along the cabinet tops before anything else is unloaded, and write the readings on the wall in pencil. The breakdown sitting on countertop installation austin tns media group lists the reasons a run drifts, and the largest one in Austin, TX is the ground under the house. East of the Balcones Fault the soil is clay that swells in wet months and shrinks in dry ones, and a countertop sits on whatever the floor did last summer.

Why the floor moves

West of the Balcones Escarpment the houses sit closer to limestone, and they tend to stay put. Toward Mueller and the east side the clay takes over, and slab foundations and pier-and-beam floors both rise and fall by small amounts through the year. A long hot summer dries the clay at the edges of a slab first, so the corners of a kitchen can drop while the middle holds.

Finding the high spot

One reading from a short level means little. The installer runs the long level across the front of the run, then along the back, then diagonally, and a laser line projected along the wall shows the whole run at once. The high spot is the reference. Everything else is brought up to it, since cabinets cannot be lowered without cutting them.

Shimming and fastening

Cedar or composite shims go under the cabinet base at the low points and behind the frame at the wall, tapped in until the reading matches the high spot. Each cabinet is then screwed to its neighbour through the face frame and to the wall studs, so the run moves as one piece. A shim that carries a heavy slab needs to sit at a screw location, not between them, or the weight bends the cabinet floor.

What a stone top does with a crooked base

Granite, quartz and quartzite do not flex. A slab set on a run that is an eighth of an inch out will rock on the high points, and the stress concentrates at the sink cutout and at the seam. That is where hairline cracks start, usually in the first season after install. Porcelain and solid surface are a little more forgiving, but a seam between two pieces will show a lip if the cabinets under it differ in height. Seam placement is chosen after the levelling, not before.

Planning for the next move

A level run on install day will not stay level forever. Installers leave a thin bead of flexible caulk at the wall in place of rigid grout, so a small shift does not tear the joint. Homes near Lady Bird Lake and the creek bottoms along Shoal Creek, where the clay holds more water, tend to move more than those on higher ground. Cabinets get re-checked at the template visit, because the floor can change in the weeks between measuring and cutting.