Home / Miscellaneous questions / Warmup Insulated Underlayment -WIU
Should I install the WIU with the foil side up or down?
WIU should be installed with the foil side facing DOWN. This foil backing acts as a moisture barrier.
Home / Miscellaneous questions / Warmup Insulated Underlayment -WIU
WIU should be installed with the foil side facing DOWN. This foil backing acts as a moisture barrier.