Buildings are constructed to let air and water through the boundary wall of a cavity. Therefore, rain penetration is the major problem to cavity fill; more so, as weather patterns become more extreme. If cavity fill becomes wet, it then becomes a conductor of heat, rather than an insulator, and the heat loss can be greater than having no cavity wall insulation at all.
In winter the boundary/outer wall is the coldest of the walls within the cavity and water vapour/condensation will return to water on the inside of the boundary wall. The rest of the year the inner leaf/wall of the cavity is the coldest & the water vapour returns to water on the outside of the inner wall making this wall damp.
This system overcomes insulation & damp problems by using its unique design to collect the water and divert it out through the boundary wall. This reduces “bridging” (water transference across the cavity) & the associated damp risk (condensation) on the internal walls of the cavity & reducing frost damage to the outer walls. In addition, the system does not create further cold spots.
The system provides a barrier which closes any part of a cavity completely, independent of height. When used with readily available insulation material, this provides a cost-effective way to achieve an insured insulated wall.
This UK SME has developed, and holds patents for, the unique retrofit horizontal cavity wall barrier (cavity tray) that can easily and economically be fitted to any new/existing buildings.
The technology consists of a horizontal cavity tray, a unique insertion system which sections a continuous cavity; supports insulation material & addresses rain penetration by collecting water and removing it from the building.
Partnerships are sought with potential organisations to use the system under licence.