Floor flatness. It’s one of the biggest issues installers are faced with on a day-to-day basis for every category of flooring. Issues happen both on concrete and wood subfloors. So how are installers checking floor flatness? The use of string lines (Photo 1), straight edges (Photo 2) and lasers are common tools used.
For the past couple of years we’ve been using a laser to check for floor flatness. Now that we’ve run it through its paces I’ll share my thoughts. The laser is from Bosch and is a model GSL 2 surface laser (Photo 3). What we’ve found is that one person can check the flatness of the subfloor in an entire area within minutes and know how much the substrate is undulating. The tool paid for itself in the first couple of jobs where we had to check for flatness, and it’s a very visual way to show your client what areas of concern there are with the substrate.