100% refit advice

[biffo17]

hi my 1st post , im doing a 100%refit on my bathroom

all plaster is off ,all lath and plaster is off,its all being re tiled ok

a shower bath is going in ,this is where the bare brickwork is ,250 hardiebacker is going direct to wall /adhesive and screwed


the remaining walls all studwork i intend to use the 12mm moisture resistant plasterboards

the floorboards are up ,18mm ply going down 250 hardiebacker on top of this ,ahdesive and screwed

does this sound ok ??

im not doing the tiling !!!
horses for courses ,me thinks

 

[merlecollins]

Sounds good to me Biffo

 

[doug boardley]

hi my 1st post , im doing a 100%refit on my bathroom

all plaster is off ,all lath and plaster is off,its all being re tiled ok

a shower bath is going in ,this is where the bare brickwork is ,250 hardiebacker is going direct to wall /adhesive and screwed


the remaining walls all studwork i intend to use the 12mm moisture resistant plasterboards

the floorboards are up ,18mm ply going down 250 hardiebacker on top of this ,ahdesive and screwed

does this sound ok ??

im not doing the tiling !!!
horses for courses ,me thinks

I'd use the 500, (12.5 mm as opposed to 6mm) or even 12.5 mm plasterboard (dot and dabbed) with a tanking membrane.

 

[Ken Bruty]

Doug, you beat me to it. I must get quicker on my keyboard :mad2:

 

[biffo17]

so h/b 500 0n the walls , why tanking ?? better option ??

i was gong to use 500 on the floor but it would raise the threshold too much

thanks for quick replies

 

[Daz]

As per Doug and Ken, Hardie 250 is not specified for use on walls.

 

[biffo17]

ok mate thanks 250 ok on the floor ??

 

[doug boardley]

so h/b 500 0n the walls , why tanking ?? better option ??

i was gong to use 500 on the floor but it would raise the threshold too much

thanks for quick replies

water will pass through hd, but will not affect it. If it's tanked water won't even get to your substrate

 

[merlecollins]

Could have sworn 250 was 12.5mm:mad2: I just always say 6 or 12.5mm when ordering:mad2:

 

[biffo17]

so i could just dab 12mm p/b ( forget backer board)and tank it . better job costs about the same

 

[doug boardley]

so i could just dab 12mm p/b ( forget backer board)and tank it . better job costs about the same

yes, altho' plasterboard won't hold as much weight as hardie/cement based boards

 

[biffo17]

the area is approx 2000mm x 2000mm

origionally i had 2 mirrors 2000mmx2000mm /1000mm x 2000 sat in a frame silcone jointed

all was bone dry when i removed them !!

 

[doug boardley]

it's the tile weight I ws referring to biffo, do you know the weight, (per m2) of your tiles?

 

[biffo17]

not yet doug er indoors not decided YET !!!!

ill know tomorrow thanks again

 

[doug boardley]

not yet doug er indoors not decided YET !!!!

ill know tomorrow thanks again

here's the weight bearing guide for you biffo (courtesy of Oli's bible)


Substrate weight ratings

A common question, how much weight can my wall support, here are the reccommended max weight ratings in KG / m2

Plaster Skim on Plaster Board........20KG
Skim and Set Plaster...................28KG
Plaster Board.............................32KG
Sand and Cement.......................40KG
Cement Backer Board..................55KG
Hardibacker Board.......................45KG
Lightweight Tile Backer Board........40KG
Glass Reinforced Cement Sheet.....50KG
Gypsum Fibre Board.....................40KG

Remeber to factor in the weight of the tile / m2 AND adhesive and grout

Grout.........2KG / m2
Adhesive....4KG / m2