Cement Fibre Boards in shower area

realtec

Hi folks,

I intend to use half inch 8x4 cement fibre boards as backers in my shower room areas. They seem very strong.

Would these boards need special screws or would regular slabbing screws suffice?

Also would they be strong enough to take fixings such as shower doors, shower head unit etc? or should additional timber be fixed behind them where we intend to hang things?

thanks

mfceiling

realtec wrote: »

Hi folks,

I intend to use half inch 8x4 cement fibre boards as backers in my shower room areas. They seem very strong.

Would these boards need special screws or would regular slabbing screws suffice?

Also would they be strong enough to take fixings such as shower doors, shower head unit etc? or should additional timber be fixed behind them where we intend to hang things?

thanks

They'll need special screws that allows them to countersink. Normal drywall screws will suffice as long as you drill a small hole to countersink the screw head.
I would still put timbers in for grounds to be safe.

realtec

mfceiling wrote: »

They'll need special screws that allows them to countersink. Normal drywall screws will suffice as long as you drill a small hole to countersink the screw head.
I would still put timbers in for grounds to be safe.

thanks for that info... its only when you are sitting on the bus you think of these things

BryanF

Ss screws

realtec

So, i got the stainless steel 40mm counter sinking screws just to be on the safe side and have got the extra groundings in place. thanks for the advice here....

So the cement fibre boards are going in shower area. i will be putting an acquastrap at the back of the shower tray.. for additional safety i will be running a tanking blanket at the back of the shower area too (maybe this is overkill but its additional piece of mind).

However, i was just wondering, would be it a bad or good idea to tank the whole bathroom floor and say a few inches up along the wall? the shower is uostairs, timber joists, timber studding... ??

mfceiling

realtec wrote: »

So, i got the stainless steel 40mm counter sinking screws just to be on the safe side and have got the extra groundings in place. thanks for the advice here....

So the cement fibre boards are going in shower area. i will be putting an acquastrap at the back of the shower tray.. for additional safety i will be running a tanking blanket at the back of the shower area too (maybe this is overkill but its additional piece of mind).

However, i was just wondering, would be it a bad or good idea to tank the whole bathroom floor and say a few inches up along the wall? the shower is uostairs, timber joists, timber studding... ??

Wouldn't do any harm at all.

We did a bathroom a few years back and they wanted it tanked up the wall a bit. First time I ever saw it done and it looks like the right job. Might as well do it when you are at this stage tbh!!

goz83

I always recommended tanking the whole shower area and a foot up the rest of the room when someone was doing a full refit. It's a small price to pay for the protection it offers.

kieran.

check the fixing instructions from the manafacturer many cement particle boards need to be fixed 25-30mm from the edge as they can be brittle and a standard 50mm wide stud won't suffice.