We are about to start the process of replacing our existing bathroom.

We will be using 10mm thick marble tiles and understand the current skimmed plasterboard walls will not support the weight of these.

I intend to pull down all the existing plasterboard, (one wall dot and dab, the three others on batterns), and replace with fresh moisture resistant plasterboard.

However, it appears we can buy either square edged or tapered edge plasterboard. Looking at the sizes available we can get the square edged board in 1200x900 boards that might make it a bit easier to handle, or the tapered edge boards in 2400x1200 - which as im doing most of this on my own could be a bit big !!

Is there any problem with using the smaller square edged boards when tiling floor to cieling?

Obviously we will be fully tanking the area over the bath for the shower - Dunlop Kit already sat waiting to be used.

Cheers
James

go for the 1200 x 900 x12.5mm boards, if you are ripping out the walls to leave the stud word i would add extra cross battens to make the plasterboard more rigid...
chris

square or tapered edges? Or doesnt it really matter

tapered edges are good if you are not going to skim plaster, just fill the taper with scrim tape and board adhesive, square edge plasterboard is for skimming!

hope that helps!

Dagger.

the weight of these tiles might prove to heavy for plasterboard,i would make sure they don't exceed about 28kg per m2 or you will need to use hardiebacker or aquapanel for this

i would use 10mm cement boards ...

I would use square edge, tapered edge board if you tape jointing

Originally Posted by J_lee83

square or tapered edges? Or doesnt it really matter

doesnt matter apart from the price as you dont see the
edge once its tiled

square edge it is then! Good its a bit cheaper!

I'll double check the weights but I'm pretty sure im ok.

By the way does the dunlop waterproofing kit reduce the load a plasterboard wall can hold?