No studwork on shower wall for aquaboard

[monkeyhanger]

I've ripped my ensuite to bits to reinforce the studwork in an alcove for the shower prior to putting up aquapanel then quartz tiles.

For the 3 wall alcove, it's 800mm width for each of the 3 walls in a "U" formation.

The left and right wall are studded, and i'll be adding in extra noggins, but the back wall had the old plaster board spotted onto the blockwork wall (the heavy duty blocks that are structural behind the outer brick wall in a house) behind with some cement based adhesive (type unknown), as the front to the back of the alcove is only 819mm deep now that the board has gone, but the other 2 walls are 800mm apart.

So I literally have 19mm to play for increasing the thickness of the back wall with adhesive. Should I spot the aquaboard to the wall, or should I drill and fix rawlplugs into the wall and screw the aquaboard into those holes with the ceramic coated screws?

Third option is to use rawlplugs to screw batons made from 2" x 1" dressed (planed) to the blockwork (as 1" dressed is 19mm thick), and then screw the aquapanel to the batons. The screws are 40mm long, so knocking off 12.5mm thickness of aquapanel leaves 28mm of thread and only 19mm of wood to bite. Are these screws hard enough to go into the blockwork for 9mm depth?

The 2 studded walls will have their aquapanel fixed with the ceramic screws.

So Spot adhesive or rawlplugs (into blockwork), or 19mm thick batons rawlplugged into blockwork?

If spot, which adhesive would you recommend?

If rawlplugs, would you put a thin bead of gripfill on the back of the board before you screw it to the wall (or am I just over engineering)?

I intend to put the back run of aquapanel in first and then the 2 sides will go in to overlap the left edge and right edge of the back board (leaving 3mm gap between boards to Silicon in of course).

 

[Mike]

I've ripped my ensuite to bits to reinforce the studwork in an alcove for the shower prior to putting up aquapanel then quartz tiles.

For the 3 wall alcove, it's 800mm width for each of the 3 walls in a "U" formation.

The left and right wall are studded, and i'll be adding in extra noggins, but the back wall had the old plaster board spotted onto the blockwork wall (the heavy duty blocks that are structural behind the outer brick wall in a house) behind with some cement based adhesive (type unknown), as the front to the back of the alcove is only 819mm deep now that the board has gone, but the other 2 walls are 800mm apart.

So I literally have 19mm to play for increasing the thickness of the back wall with adhesive. Should I spot the aquaboard to the wall, or should I drill and fix rawlplugs into the wall and screw the aquaboard into those holes with the ceramic coated screws?

Third option is to use rawlplugs to screw batons made from 2" x 1" dressed (planed) to the blockwork (as 1" dressed is 19mm thick), and then screw the aquapanel to the batons. The screws are 40mm long, so knocking off 12.5mm thickness of aquapanel leaves 28mm of thread and only 19mm of wood to bite. Are these screws hard enough to go into the blockwork for 9mm depth?

The 2 studded walls will have their aquapanel fixed with the ceramic screws.

So Spot adhesive or rawlplugs (into blockwork), or 19mm thick batons rawlplugged into blockwork?

If spot, which adhesive would you recommend?

If rawlplugs, would you put a thin bead of gripfill on the back of the board before you screw it to the wall (or am I just over engineering)?

I intend to put the back run of aquapanel in first and then the 2 sides will go in to overlap the left edge and right edge of the back board (leaving 3mm gap between boards to Silicon in of course).

i would use dry lining adhesive to dot and dab it to the wall, as for the screws going into the block, they'll probably push the battens off the wall before penetrating the blockwork

 

[faithhealer]

You can't dot and dab aqua panel if it's a hardie backer type board and tape over the joints not silicon
Any chance you can render that wall?

 

[Scott]

You'll have to fix it with plugs and screws, as Faithhealer says you can dot and dab with cement board

 

[peckers]

Can you get a sheet off scluter kerdi board for this wall? this you can dot and dab using tile adhesve spf, and they supply anchor fixings that you can then screw this back to the masonry wall with!

 

[peckers]

you can get a sheet off schluter kerdi board this is a tile backer board that is waterproof, this you can dot and dab with spf addy and they supply the anchor fixings so as it can be screwed back to the masonry wall as well.

 

[doug boardley]

You'll have to fix it with plugs and screws, as Faithhealer says you can dot and dab with cement board

do you want me to edit that Scott?:smilewinkgrin:

 

[peckers]

do you want me to edit that Scott?:smilewinkgrin:

't :smilewinkgrin:

 

[Scott]

😳 Yes please Doug was written in a hurry!

 

[peckers]

😳 Yes please Doug was written in a hurry!

:8:more like😛rrr: