Discuss Fixing backbox to aircrete / thermalite in the Electrical Forum area at ElectriciansForums.net

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Hello All

When fixing a backbox to soft airated blocks like aircrete etc, do you use special fixings or is a pair of normal brown plugs typically good enough ?

Thanks in advance.
 
Ive pretty much moved to 1.5" 10s for everything, with red plug unless the head is going to be visible.

Drive in with inpact and nip up by hand, learnt that from cracking surface boxes.
 
Hello All

When fixing a backbox to soft airated blocks like aircrete etc, do you use special fixings or is a pair of normal brown plugs typically good enough ?

Thanks in advance.
Dampen the hole you have cut for the box:
Drill some fixing holes:
plug and add some long fixing screws:
Whack in some Compo (BRICKIES MUCK) remove long screws. set box in said Compo reset some screws, make sure box is level , fill in the rest of the hole with Compo, wait until Compo has set tighten screws and Bob's yer Uncle, or in this case box fitted.
 
make box cut out dead tight then fit box with hammer. :p :p :p
 
I used to use no.8 1 1/2" screws with red plugs.... for years... then I watched another spark plowing screws straight into the blocks with no plug.... that's rough I thought.... but having tried it it holds aswell as plugs! Tends to be rendered in pretty soon after so now that's what I do
 

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