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At last a simple low cost solution to building regulations part L (Air Leakage) Joist helmet provides an effective airtight seal to a cavity wall and has also been approved for party wall use which is a quick and easy to use
Two sizes are available 9" x 2 " and 9 "x 4" (Internal 228mm x 50mm and 228mm x98mm) The helmet will cover any wall construction type you are ever likely to build To register your interest email - sales@joist-helmet.com For technical information visit - www.bbacerts.co.uk
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Send mail to
julie@joist-helmet.com with
questions or comments about this web site.
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