I'm replacing the double-skinned plasterboard stud wall surface in my bathroom, which is also a party wall with my neighbour, hence the double-thickness plasterboard for fire regs.
As expected, once the tiles were removed, both layers of plasterboard behind the shower are damp and full of black mould, and the vapour barrier behind is covered in droplets of moisture. The front later of plasterboard was extremely soft and the tiles fell off with practically no encouragement.
The studs are at 600mm centres, so I'm adding extras to make them 300mm centres, and the plan is to fix a skin of plasterboard, then a poly vapor barrier followed by an outer skin of Aquapanel and finally tile & grout with 17kg/sqm floor/wall tiles. The idea of the poly barrier is to prevent moisture penetrating the Aquapanel from damaging the plasterboard behind.
However, my concern is that the only Aquapanel screws I can buy are 40mm, but Knauf's website recommends using longer 55mm screws for a double layer board construction which seem not to be available anywhere in the UK.
Do you think if I double the count of screws to one every 100mm rather than 200mm that this would sufficiently compensate for having only 15mm of screw penetration in the wooden studs?
Failing this, is it possible to use drywall screws with Aquapanel, or is this a non-starter? (lack of corrosion / strength / penetration ability?)
As expected, once the tiles were removed, both layers of plasterboard behind the shower are damp and full of black mould, and the vapour barrier behind is covered in droplets of moisture. The front later of plasterboard was extremely soft and the tiles fell off with practically no encouragement.
The studs are at 600mm centres, so I'm adding extras to make them 300mm centres, and the plan is to fix a skin of plasterboard, then a poly vapor barrier followed by an outer skin of Aquapanel and finally tile & grout with 17kg/sqm floor/wall tiles. The idea of the poly barrier is to prevent moisture penetrating the Aquapanel from damaging the plasterboard behind.
However, my concern is that the only Aquapanel screws I can buy are 40mm, but Knauf's website recommends using longer 55mm screws for a double layer board construction which seem not to be available anywhere in the UK.
Do you think if I double the count of screws to one every 100mm rather than 200mm that this would sufficiently compensate for having only 15mm of screw penetration in the wooden studs?
Failing this, is it possible to use drywall screws with Aquapanel, or is this a non-starter? (lack of corrosion / strength / penetration ability?)
