Overboard screw sizes????

[limerockconstruction]

Chaps - just thought i'd gauge some opinion.

I have to overboard a ceiling with 80mm PIR and then 12.5mm board.

What size screws would you be happy with?

 

[noseall]

130mm.

 

[limerockconstruction]

Thanks mate - is 37.5mm enough in to the timber? I've got paranoid that more is necessary....

Makes me wonder when fixing this overboarding to ceilings is going to become too much for the fixings?

 

[noseall]

Thanks mate - is 37.5mm enough in to the timber? I've got paranoid that more is necessary....

Makes me wonder when fixing this overboarding to ceilings is going to become too much for the fixings?

Try and pull one out!

It's loads mate.

 

[limerockconstruction]

I've got some 150's on the way, so at least my mind is at rest. Cheers