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feature
doors, windows, glazing & hardware
winds). Certain grades can be installed to give a weatherproof seal in excess of 1000 pascal, which is hurricane force driven rain. In addition to the whole life economy, exact quantities can also be calculated so wastage is minimal. What about accommodating building movement? Impregnated tapes will also give a greater MAF (Movement Accommodation Factor) than wet sealants – up to 130% – allowing for a greater tolerance on site. How long do they last? The durability, life-long elasticity and UV stability of impregnated foam tapes mean that once installed, they are effectively maintenance free, with a life expectancy of 25 years plus. Can sealant tape be used for passive house projects? Certainly, tapes comply with appropriate standards such BS8213 CoP for window and external door set installations, and meet passive house performance criteria, specifically where perimeter seals around fenestration and movement joints in things like brickwork structures perform a vital function. Occupants are also assured that the U value of the ‘gap’ is at least as good as the window, but usually better – down to 0.6W/m2K. Latest sealing tapes also comply with the Building Energy Act as well as the RAL quality assurance association and can accommodate extremes of temperature changes, from -30°C to + 80°C.
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properties to enhance energy efficiency performance of doors and windows. So, any construction gap can be filled with these tapes to allow for movement and retain the seal. How can they be applied? These tapes are easy to install by relatively unskilled operatives in any weather conditions. Gaps up to 100mm if needed can be closed and the tape covered over if needed. How quickly can tapes be applied? A major advantage is the application process. The tape is applied before installation, ensuring that the window can
easily be installed from inside the building, avoiding the need to use costly and time-consuming scaffolding and ladder access systems. Moreover, the expanding foam contours to any shape or material to form a seal, creating a neat joint between the door/window and the fabric of the building, keeping occupants warm. How well do the tapes withstand the elements? Impregnated foams can be installed easily enough but with enough compression to provide a weatherproof seal to 600 Pa. At this level a joint can resist wind driven rain up to violent Storm Force 11 (68 mph
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