backerboard

backerboard englanniksi

1. A board used behind or under other material, often as support.

2. Boards used as underlayment for tile, plaster, or other materials.

3. (quote-journal)

4. A sacrificial board placed behind or under a board being drilled or sawn, so as to prevent at exit side of drilled hole or sawn edge|blowouts. (ngd)

5. Sheets of cardboard or similar material used to preserve or display books, magazines, art (l), etc.