The Ametalin Floor Insulation Silverfloor is a type of insulation that is used for under floors with a sealed airspace between the flooring and enclosed sub-floor spacing. With built-in 5mm weep holes throughout the membrane, it helps prevent the build-up of moisture. It reduces drafts through strip flooring and achieves a winter total system R-value of R3.6 and a summer total system R-value of R1.5. The SilverFloor insulation can be used for both new and existing buildings.