Walls are never straight

In short

1. 01The angle between two walls is rarely exactly square. Measure it with an angle finder in every corner that will take cabinets.
2. 02One degree out gives a gap of about 17 mm per metre of length. On a 3 m run that is about 5 cm.
3. 03Check how flat a wall is with a long straightedge, horizontally and vertically. Note any bulge or lean on the sketch, with its position.
4. 04A floor is rarely level. Base units are levelled from the highest point of the floor, and at lower points the legs are wound out further.
5. 05The design never runs tight to the wall. A filler closes the gap at the wall, and it is scribed to the shape of the wall on site.