Measure the distance between joists (from inside edge to inside edge) and cut Foilboard® to suit required width
Place Foilboard® Flexifast® clips at 600mm centres along the Foilboard® panels edge. (Foilboard® can be installed with either the silver face or green face exposed)
Slide the Foilboard® GREEN rigid panel between the joist to the desired depth. (foilboard® can be installed with either the silver face or green face exposed)
Use a 6g screw or nail to fix the Flexifast® clip to the slides of the joists.
Use either Foilboard® green tape or silver tape to seal all butt joins between the panels, along with any minor gaps.
Foilboard® Flexifast clip
Either Foilboard® PVC or Aluminium joining tape
Retractable Blade / Knife