Dozens of windows and doors at an award winning Passivhaus new build project have been air tight sealed using advanced foil sealant tape technology from ISO-Chemie.

ISO-CONNECT VARIO SD humidity regulating foil has been used to achieve air tightness of less than 0.6 air changes/ hour to comply with Passivhaus standards at the new Hastoe Housing Association’s Ditchingham scheme in Norfolk.

Specified by window installer Sidey Ltd UK because of its ability to provide rapid and effective year round high performance sealing of window and door reveals, ISO-CONNECT VARIO SD provides ‘intelligent’ humidity control for scheme.

The foil is part of a new generation of window sealing products that not only adapt to seasonal variations, but also provide an excellent external weather seal that surpasses UK Building Regulations for air tightness in domestic and commercial buildings when used as an internal seal, as well as sealing against wind driven rain to Hurricane forces.

The three bedroom terrace houses have been built in a conservation area adjacent to Grade II listed buildings.

Dan Higginbotham, associate at London-based project architects Parsons and Whittley, said: “ISO-CONNECT VARIO SD is a very good overall product providing excellent air tightness qualities. Cost savings were also achieved using the foil when compared to the sealing product originally considered for the scheme, a vapour resistant plaster sealing tape.”

Designed to last the lifetime of the windows, ISO-CONNECT VARIO SD will bond to virtually any substrate and guarantee the airtight and weather tight integrity and is part of the ISO³-WINDOW SEALING SYSTEM, which comes with a 10 year guarantee.

ISO-Chemie is one of Europe’s main producers of impregnated foam sealants, specialising in the manufacturer of foam products from polyethylene (EPE), polypropylene (EPP) and polyurethane (PUR) using the latest production techniques.

The company’s UK technical and distribution operation is based in the North East of England, supported by a dedicated logistics service to ensure customer orders are completed as quickly and efficiently as possible (usually next-day delivery).

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