Block or Concrete Wall Method A

Product Foil Double Bubble Foil   Average R-Value Heat Flow Horizontal: R-7.8* * System R-Value is for one enclosed air space. Additional R-1.7 addes for a still air film.   Instructions Apply 1 x 3 strapping vertically (at 16" centre), running the length of the wall. Measure working area where Flexfoil will be applied. Fasten the Flexfoil to the strapping using 1/2" staples every 4" - 6". Ensure that all seams are securely taped using Flexfoil reflective tape.