1 x Framing screws TEKOR Countersunk Head With Serration T40 8X220 Thread Length: 100 cut Type 17 Drilling Point Zinc

To hold a specific glass wool insulation. The screws will be screwed into 40mm battens to hold a 200mm bare glass wool insulation between 2 synthetic vapor barriers.

Construction of a frame Wooden frame

Terrace frame Douglas joists

Wooden structure Ipe terrace

I use these screws to fix the counter slats on a roof whose insulation is sarking. The screw must pass through the 27mm counter slat, the 100mm EFISARKING polyurethane insulation and take at least 80mm into the rafter as required the DTU

Point for nailing deck board

Reinforce wooden roof structure Bastaing 80 x 160 lg 6000