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JUNE 06 - HELPING BELLWINCH PROVIDE OPTIMUM PROTECTION - INVISIBLY

A major housing development by Bellwinch Homes, part of the Kier Group, to provide over 400 new homes in Aylesbury will give residents optimum protection from damp, noise, fire and gas, invisibly, through solutions from Z-Led.

The homes are being created in four blocks of apartments. Z-Led is supplying Gas Protection products for Radon IntraWeep Cavity Trays and its Acoustic Fire Barrier range to provide complete protection against damp, gas, noise and fire.

Bellwinch project manager Dave Stilwell observed, "We aim to construct our homes to the best specification within financial limits. Whilst the area is not subject to radon gas at present, you never know how situations could change and it is nigh on impossible to retrospectively fit a barrier, so it was sensible to install it during the initial build process. The AFB system gave us an effective method- both in material and labour costs- of ensuring each home was well insulated against noise whilst simultaneously incorporating Building Regulatory requirements for damp-proofing and fire. The building design includes a lot of parapets and we are conscious that flashing and soakers where the roof meets the wall is not necessarily sufficient to ensure the cavity remains dry, hence the inclusion of the IntraWeep trays. From our point of view, it was helpful to be able to source all dpc and associated requirements from one source, that could deliver to site to our schedules."

The Z-Led Gas Protection system comprises a quick and easy to install roll of Protect Radon Shield 375 polyethylene sheet that both provides a damp proof membrane and prevents penetration by radon gas. The perimeter of the membrane is sealed to the Z-Led Cavity and Slab Edge protection barrier which has a textured surface to provide mortar adhesion and prevent the creation of slip planes in the masonry. The Z-Led system can accommodate virtually any cavity width both linear and angular.

The Acoustic Cavity Fire Barrier with Integral Cavity Tray provides minimum 30 minutes fire integrity, 15 minutes insulation integrity and provides complete cavity tray protection whilst contributing to the reduction of sound transmission in wall cavities in multi-occupancy developments. The fire performance ensures compliance with Building Regulation Approved Document B, whilst the acoustic benefit meets Building Regulation Approved Document E1, and, when installed as per Robust Details, eliminates the need for on-site testing.

The IntraWeep Cavity Trays ensure the integrity of the stepped damp proof course is retained and that any water from the roof does not enter the cavity but is safely diverted from the roof and external brick- or blockwork below, in compliance with BS8215: 1991. Self supporting, the Trays can be used in any cavity from 50mm wide upwards.

The Z-Led range of cavity trays has been developed to provide solutions to all common detailing and installation problems. Preformed or pre-creased, they are easy to install, avoiding the need to create complex shapes on site.

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