EW1346D Timloc Building Products – Thermo-loc FR30 cavity closer


This is an assessment of Thermo-loc FR30, an insulated cavity closer suitable for first and second fix applications, around window and door openings in masonry and timber frame cavity construction. The function of the product is to provide an insulated DPC at jambs and sills at window and door openings, thereby reducing condensation, and alleviating cold bridging and mould growth in these areas. The product is also fire rated. 

The white rigid extruded uPVC profile, housing 25mm thick Earthwool mineral fibre (encapsulated in a polythene sleeve), is supplied in two standard profiles to accommodate cavity widths 50-100mm (single profile and flush reveal profile) and 105-300mm (double profile).


Valid until 25th November 2022


Please Note: Every care was taken to ensure the information was correct at the time of publication. Any written guidance provided does not replace the user’s professional judgement. It is the responsibility of the dutyholder or person carrying out the work to ensure compliance with relevant Building Regulations or applicable technical standards.


Timloc Building Products
Timloc House
Ozone Park
DN14 7SD
01405 765 567