can I screw plasterboard over 50mm celotex using 75mm drywall screws, ie is 25mm into the rafter enough of a fixing? Pretty sure I’ve done it before but can’t remember
-
Looking for a smarter way to manage your heating this winter? We’ve been testing the new Aqara Radiator Thermostat W600 to see how quiet, accurate and easy it is to use around the home. Click here read our review.
50mm PIR across rafters?
- Thread starter 23vc
- Start date
Oops Yes sorry 12mm into rafter, thanks
Of course you can do it, but I suspect that is not the question.
12mm in to a rafter is not enough, and whilst 25mm is the minimum for a board fixed direct to timber, with the 50mm insulation it will still allow a lot of flexing and reduced bracing of the rafters by the boards. Probably 40-50mm fixing would be better.
12mm in to a rafter is not enough, and whilst 25mm is the minimum for a board fixed direct to timber, with the 50mm insulation it will still allow a lot of flexing and reduced bracing of the rafters by the boards. Probably 40-50mm fixing would be better.
Thanks all, I’ll get longer screws
We use 100mm, standard. Arm aches after though.
Vaulted ceilings eh.
Vaulted ceilings eh.
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
