The airtightness of a dwelling, or its air permeability, is expressed in terms of air leakage in cubic meters per hour per square meter of the dwelling envelope area when the building is subjected to a differential pressure of 50 Pascals (m3/(h.m2) @ 50Pa). The dwelling envelope area is defined in this context as the total area of all floors, walls and ceilings bordering the dwelling, including elements adjoining other heated or unheated spaces. Air leakage is defined as the flow of air through gaps and cracks in the building fabric. Uncontrolled air leakage increases the amount of heat loss as warm air is displaced through the envelope by colder air from outside. Air leakage of warm damp air through the building structure can also lead to condensation within the fabric (interstitial condensation), which reduces insulation performance and causes fabric deterioration.

ECT Adhesives work in partnership with Tremco Illbruck to bring to the market a number of key products inclusing Membranes, Tapes, Sealants and Foams to assist with meeting current building regulations. We introduce the i3 System: