Capit Joist Seal
The CAPIT joist seal is an open-fronted and open-bottomed box that is injection-moulded in polypropylene. It is fitted over the end of a joist that is to be built into a wall. The sides of the box converge slightly so that the seal grips the joist while the wall is built around it.
As the wall is built, a flange around the open front of the joist seal becomes embedded in the mortar to seal the CAPIT to the wall. Then once he wall has been built, the CAPIT joist seal is completely concealed behind the front face of the wall. The CAPIT joist seal is BBA approved and can be used with any block thickness and any joist height up to 225mm. It has been tested for air leakage by CERAM and fire-tested by BRE Certification.
One of the many qualities this product has is that by its nature it is extremely easy to use, with the application being a much simpler process than other similar products within the industry. Furthermore, a study carried out by CERAM revealed a leakage value of 0.57 m3/hour past their 225 x 45 mm joist cap, making it one of the best performing products of this nature on the market today.