Old floorboards tend to cap and move; being individual boards. Putting down a backer board gives you stronger/flatter stable floor.
Generally you use 1/2" board on the wall. This is to match up to the existing drywall and also strength.
The material that is used before tiling a tub surround and ensure no water damage is known as concrete backer board, sometimes referred to as green board.
You can used exterior grade plywood when tiling floors, but it is only an acceptable choice. If going over a wood substrate, the best choice is a mudbase or cement board.
Concrete backer board is usually used as an under layment for ceramic tile. It can be used on walls, floors or countertops. It has a solid core and is faced on both sides with fiberglass. It's an ideal under layment for wet areas like shower walls and bathtub surrounds, and is typically mold resitant.
No, it is not...it causes "tear out" or splintering. There are, however, numerous methods for avoiding this problem, or at least keeping tear out to a minimum. One can score the plywood first by setting the height of the blade just deep enough to score the top veneer, then recut all the way through. One can use a backer-board and set the saw blade deep enough to cut into said backer-board. One can also use tape. It works similarly to the above-mentioned backer-board to prevent tear out. Of course, there are others, but these three just came to mind. In fact, I used the backer-board method several times just today (I am a carpenter :).
Backer boards are typically used in construction. They are made of gypsum and are used to make walls. They can be purchased from large home improvement stores.
One common use is in tiling.
Ceramic tile can be installed over any non-compressible solid, non-flexible surface, but in areas of high moisture or possible water penetration, a cementious or water impermeable backer should be used to prevent rot.
Tiles used on floors tend to be thicker than wall tiles. Also, floor tiles are subjected to flexing as people walk over them. Therefore, if floor tiling a wooden floor, use a flexible cement adhesive and grout designed to give and take without cracking.
Wonder board is a cement board that is very firm. Unlike wood it doesn't warp or rot. It is especially used as the underlayment for tile floors and shower walls.
Some common uses for marble is architecture, countertops, etc.
Both.Hardwood floors can be used :Dining hallHallCarpet can be used :Classrooms
If what you mean by carpet sweeper, is a regular vacuum, then they can only be used on tile floors if they have a selection that is special for bare floors.