SUITABLE AND UNSUITABLE SUBSTRATES

FLOORS

Suitable Subfloors: All subfloors that are structurally sound and free of excessive movement are suitable for tiling over. They include:

·        Concrete

·        Terrazzo or natural stone

·        Ceramic tile

·        Non cushioned vinyl and linoleum

·        Cement back boards

·        Double layered plywood (exterior grade)

Unsuitable Subfloors: These are not suitable because they tend to flex, expand and contract or warp. Any excessive movement will loosen the tile and pop the grout. These subfloors must be replaced or covered with a suitable underlayment.

·        Cushioned vinyl

·        Perimeter installed vinyl

·        Single layered plywood

·        Flake board

·        Particle board

·        Chip board

·        Stripped wood

·        Luan plywood

WALLS

Suitable Substrates

·        Concrete or masonry

·        Drywall (dry areas only)

·        Plaster

·        Cement backer boards

·        Plywood (dry areas only)

·        Ceramic tile

Unsuitable Substrates

·        Paneling

·        Wallpaper

·        Masonite