Dow Tuff R or Dow Thermal Light Duty
Underside of concrete slab and beams. (White/foil facing down).
Dow Tuff-R or Dow Thermax Light Duty
All surfaces must be clean, sound and free of dust and contaminates.
Apply Dow Tuff-R/Dow Thermax Light Duty adhesive in daubs the size of a 10 cent coin to the surface of insulation @ 300mm to 400mm centres. Press insulation board into position.
Apply Dow Tuff-R/Dow Thermax Light Duty mechanical fixings (two per 2235 x 1200mm board). Position @ 600mm from all edges. Apply 75mm wide reinforced foil tape to all joins. Where insulation board is exposed to the elements, then foil tape must secure the edge of insulation board.