15th October 2023


ISO Chemie’s thermal insulating and load bearing bracket support system has been specified for a major South East housing refurbishment programme.

The move sees dozens of WINFRAMER units being retrofitted by Sandy-based Potton Windows on pre-fabricated residential properties on a Milton Keynes housing estate over the next two years as part of a window upgrade investment project. The use of ISO-TOP WINFRAMER will help to provide improved standards of thermal insulation, eventually bringing the properties up to zero carbon ready standards and delivering energy efficiencies for home owners together with long-term cost savings.

Passivhaus certified and fire rated to up to 30 minutes, WINFRAMER is a prefabricated installation frame, manufactured to accommodate cavities up to 250mm that allows windows to be supported independently from the face of the wall regardless of any external cladding being in place.

Quick and easy to install, the product’s application alongside the new window units is already reaping benefits for some homeowners, who are seeing a reduction in their heating usage with ‘huge’ energy cost savings.

The Potton Windows Milton Keynes project comes as a wider Government strategy continues to push  to reduce carbon levels in housing that has single skin, cavity or non-cavity walls - these buildings have a reputation for losing considerable amounts of energy, heat and sound.

ISO-Chemie’s ISO-TOP WINFRAMER thermal insulating and load bearing bracket support system has been specified for a housing refurbishment programme in Milton Keynes.

Tom Ray, contracts manager at Potton Windows, which manufactured and installed the original windows back in the late 1980s and is now replacing them supported by ISO-Chemie’s sealing technology, said: “As window system designers and developers, we are always looking at smarter ways to deliver low carbon units. ISO-Chemie’s fit and forget products offer solutions for effective window sealing, delivering measurable airtight, acoustic and thermal sealing benefits in the process.

Andy Swift, country director at ISO-Chemie, said: “As new building regulations continue to bite, property owners and window contractors require smarter ways to deliver refurb projects through sustainable technologies. By working in partnership with ourselves, we are helping Potton create high-performance windows with a highly efficient installation.”

The composite ISO-TOP WINFRAMER brackets can bear heavy windows loads, including bi-fold doors, to provide a reliable, strong and high-performance support frame. Installation is quick with windows attached directly and secured mechanically using either standard fixing screws or fixing lugs in the usual manner.

A hinged insulation core combines with the composite wood structural bracket to become an integral part of the overall wall structure, providing compliance with window energy saving regulations (EnEV) and the RAL quality assurance association.


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