Vysa-Pronâ„¢ MAX tile backer board provides the thermal insulation needed to prevent downward heat loss of ceramic tiled and stone floors and, to prepare an uneven sub-floor instead of using a latex self-levelling floor smoothing compound.

Vysa-Pronâ„¢ MAX tile backer boards are an excellent addition to any underfloor heating system and can be fitted directly over:

• Wooden floor boards
• Chipboard or other similar sub-floors
• Concrete or sand and cement screeded sub-floors

Fixing Vysa-Pronâ„¢ MAX to Concrete Sub-Floors

Ensure the floor is suitably level and dust free. New cement or concrete should be fully cured before laying Vysa-Pronâ„¢MAX.

The concrete or screed sub-floor must be relatively flat and smooth. It must be clean, secure and free from loose materials. If appropriate, fill large cracks and holes with sand and cement mix to repair a damaged concrete sub-floor.

Apply a bed of flexible floor tile adhesive using a notched trowel and then fix the boards. Slight depressions in the sub-floor will be taken up by the adhesive.

The Vysa-Pronâ„¢ MAX boards should be thoroughly bedded to ensure that no voids remain beneath them. Butt the boards close together, laid in chequer plate fashion, like bonding brickwork.

A waterproof joint can be made by applying silicone sealant to the edge of the board before butting the adjacent board to it. When the adhesive is dry, tape the board joints using fibreglass reinforcing scrim tape and more adhesive.

Fixing Vysa-Pronâ„¢ MAX to Wooden Sub-Floors

Vysa-Pronâ„¢ MAX tile backer boards are the ideal floor preparation for Vysa-Matâ„¢ heating mats or cables on top of a wooden floor boards or a chipboard sub-floor.

The wooden floor boards or a chipboard sub-floor must be sound, flat and smooth. It must be clean, secure and free from loose materials.

Vysa-Pronâ„¢ MAX tile backer boards are not suitable to cover large holes in the floor. Holes of 2" ~ 3" size may be bridged but larger holes must be repaired as appropriate.

Ensure that the floorboards or chipboard is securely fixed to the joists. If in any doubt at all, use countersunk head screws or ring nails at 300 mm centres across the whole area to fix the floor securely.

Vysa-Pronâ„¢ MAX tile backer boards can be fixed directly to wooden floor boards or a chipboard sub-floor using flexible floor tile adhesive. Apply a bed of flexible floor tile adhesive using a notched trowel and then fix the boards.

Slight depressions in the sub-floor will be taken up by the adhesive. The Vysa-Pronâ„¢ MAX boards should be thoroughly bedded to ensure that no voids remain beneath them. Butt the boards close together, laid in chequer plate fashion, like bonding brickwork.

A waterproof joint can be made by applying silicone sealant to the edge of the board before butting the adjacent board to it. When the adhesive is dry, tape the board joints using fibreglass reinforcing scrim tape and more adhesive.

Alternatively, 10mm thick Vysa-Pronâ„¢MAX may be 'mechanically' fixed to wooden floor boards or a chipboard sub-floors using suitable countersunk head screws with penny washers under the head (to distribute the load). NB 6mm boards MUST NOT be mechanically fixed - use only flexible tile adhesive.