what size mushroom fixing?

snoopmadra

hey lads,what size plastic mushroom fixing would i need for a 62.5mm insulated slab?thanks

EDIT..............would 90mm be big enough?

darragh_haven

i would think 90mm would be cutting it a bit tight. 100mm would be recommended. Also, i would advise against the plastic ones, the heds tend to pop off, the metal ones are more expensive but a way more reliable

snoopmadra

darragh_haven wrote: »

i would think 90mm would be cutting it a bit tight. 100mm would be recommended. Also, i would advise against the plastic ones, the heds tend to pop off, the metal ones are more expensive but a way more reliable

cheers,have to use the plastic ones as its a soundproofing job and the metal ones conduct sound more efficiently than the plastic ones.my supplier has said the 90's are good enough but ill change it to 100's.Thanks

mfceiling

snoopmadra wrote: »

cheers,have to use the plastic ones as its a soundproofing job and the metal ones conduct sound more efficiently than the plastic ones.my supplier has said the 90's are good enough but ill change it to 100's.Thanks

Minimum 100....you'd want at least 40 -50 mm of a catch behind it.
Pm me if you want a number of a place that are keenly priced for them.

snoopmadra

mfceiling wrote: »

Minimum 100....you'd want at least 40 -50 mm of a catch behind it.
Pm me if you want a number of a place that are keenly priced for them.

went for the 110mm,changed the order.


thanks lads