Home Products 35' Perforated Flex Pipe Plastic pipe with Fabric Sock 100mm (4") X 16' NO.: Product Name Color Diameter Length Character Expansion Ratio Application 1 Flexible Drain Pipe Black 65mm 10' Slotted 1:5 Underground / ground water drainage 2 Flexible Drain Pipe Black 65mm ...
Cellulose fiber insulation is also less subject than open fiberglass to what builders call "wind wash," which is simply air currents moving through insulation, robbing it of its R-value. Fiberglass batts that are enclosed in perforated poly bags are less subject to wind wash than are either op...