Joist sealing made simple
Helping achieve compliance with Part L by minimising air leakage around timber joists, Joint Seal from Manthorpe is a fast and easy solution for both exterior and party walls.
More reliable than mastic, it fits over the joist end before being built into the blockwork in the traditional way, forming an airtight box. During the drying out time the joist will shrink but the seal won't be affected.
Endorsed by joist manufacturers and approved by Local Authorities' Board of Agrement, it is a cheap method of preventing air leakage.
Related internet links:
Manufacturers website
BBA certificate
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