1. Inner blockwork to be built first. (NOTE: Therma-Flect Wall Board must extend below the level of the internal flooring insulation).
2. Build a minimum of four courses of internal blockwork with the first course brick ties set at DPC level.
3. Offer up the Therma-Flect Wall Board board to the inner leaf with the foil faced membrane facing outwards into the cavity, ensuring that the 50mm of overlaps face downwards and to the right to form a waterproof skin.
4. Secure Therma-Flect Wall Boar with YBS Retaining Clips at the top and bottom edges. Cut vertical slits in the membrane at the point where the horizontal overlaps meet wall ties - this will allow the foil membrane to stay flat.
5. Build outer leaf. After raising each wall section, loose mortar should be cleaned off theinsulation board. Never allow loose mortar into the cavity, or slip behind the Therma-Flect Wall Board
6. Build next course and fix Therma-Flect Wall Board as above. Ensure Therma-Flect Wall Board is installed with vertical joints staggered.