Dow GREAT STUFF Insulating Foam Sealant is flammable until it cures long enough to become tack-free. When you use it, you cannot smoke. You must shut off pilot lights and other sources of ignition and flames first.
If you are working on your home yourself, make sure to purchase high quality tools and supplies. You may spend more initially, but you’ll save money down the road. In general, quality products tend to have a longer life and can better go through wear and tear. Tools, especially, can be costly and you do not want to need replacements often.
Once you have prepared your floor, it is time to start installing your marble. Start by finding the center of the room. Measure both the length and the width, and put a chalk line down the center of each. Where these lines intersect is the center of the room. Now, the next step is very important. Lay out your marble in a test run. This is important because if you end up with a tiny piece of marble at any end, you will need to shift your center line a little to avoid having a tiny edge on one end of your floor. To keep a symmetrical look, have the starting tile straddle the centerline if needed.