re: #644 irongrampa

Peel and stick is great, it does necessitate a clean surface on installation, tho’. One thing I found is that when you start at mid-point in the room, use contact cement on the 4-block. Also, use it on the borders—this prevents the tiles from “migrating”—i.e.separating down the road. I went with Armstrong, having had great luck with them. The overriding thing is to use PREMIUM tile—the 45cent crap is just that.

Okay, what’s the 4-block?

/novice here