Whilst the BlauGelb FK-T30 concrete frame screw is mandatory for pre-wall installation, our standard concrete frame screws can be used for fixing Triotherm insulated door thresholds down into raft, subfloor or deadwork.
Please allow for 2-3 screws for every full length of Triotherm+
The minimum screw-in depth is 50mm into C25 concrete and 80mm into 7.5 N Concrete Block.
Available in following lengths:
Torx TX30 Bit required & long SDS Drill bit required for installation.

