Product Info - Thermal
Air Infiltration Properties

Air Infiltration is the natural movement of air either by convection of air from warm to cold environment or movement by pressure differential.

Weathershield, due to its perfect fit and greater mass inhibits air movement, whereas tests have proven that air movement through and around light density, poorly fitted fibrous glass insulation can reduce its effective insulation value up to one half.

Weathershield completely fills cavities and irregular surfaces thus eliminating gaps and voids which lead to convection of air.

In retrofit conditions where additional attic insulation is desired and where air leakage is occurring through other insulation types, Weathershield can be used as a blanket cover to significantly reduce air movement, fill gaps in existing insulations and between the insulation and adjacent framing members. This can substantially increase overall insulation value.