Installation of drywall and fiber cement board?

[Christer Forsbo]

I will mount a wall along a wood stove. The wall will be with a 145 mm steel stud according to the image. Closest to the stove, I will mount a 12 mm drywall and then on this a 12 mm minerit board. Now to the question, how do I mount the drywall and minerit board against the steel stud, since I can't fully access the stove side to screw the boards because there is only about 4-5 cm there. Tips?

 

[Mats-S]

Mount the inside panels against the stove with the wall lying on the floor, then raise the entire wall (with the panels in place) and screw it into place as shown in the picture.

 

[Matti_75]

You glue with gypsum board adhesive. It is enough to fasten with a few screws or wedges to press the boards against the studs/together while the adhesive dries.

 

[Christer Forsbo]

You glue with drywall adhesive. It's enough to anchor with a few screws or wedges to press the boards against the studs/each other while the adhesive dries.

Ok, does gluing really hold? Are you thinking of glue both between steel stud-drywall, drywall-eboard?

 

[Christer Forsbo]

Mount the inside panels against the stove with the wall lying on the floor, then raise the entire wall (with the panels in place) and screw it in place as seen in the picture.

I have considered this solution, but I fear it will hit the ceiling when I raise it.

 

[useless]

Ok, does gluing really hold? Are you thinking glue both between the steel frame-drywall, drywall-minerit board?

Keep in mind that the glue must be approved for bonding fire protection boards. Regular board glue is not, I guess.

 

[useless]

Have been considering this solution, but fear it will hit the ceiling when I raise it.

Can't you make it a couple of cm lower and put spacers between the beam and the ceiling after you've raised the wall? That seems like the simplest and cheapest solution.

 

[Christer Forsbo]

Can't you make it a couple of cm lower and place spacers between the beam and the ceiling once you've erected the wall? It seems like the simplest and cheapest solution.

Good idea, considering possibly mounting it upright and twisting it in to avoid the problem.

 

[Christer Forsbo]

Keep in mind that the glue must be approved for bonding fire protection boards. Regular board glue is not, I guess.

No, plenty to consider, I got a tip about PL 400 or PL 600, but I don't know if they maintain the right fire classification. Seems to only specify temperature resistance up to +70, PL800 up to +90.

 

[Matti_75]

Ok, does gluing really hold? Are you thinking of glue both between steel stud-drywall, drywall-cement board?

Yes in both cases. The adhesive is specially designed to glue drywall to steel studs. The only requirement is that it's c/c 450mm max on the studs.

 

[Mats-S]

Can't you make it a couple of cm lower and put spacers between the stud and the ceiling when you have erected the wall? It seems like the simplest and cheapest solution.

Agree 100%

Don't complicate it with gluing, it's much easier to screw the boards in place.
You can calculate the margin (a2+b2=c2), but I guess a max of 1cm so you'll also have some playroom.

 

[Christer Forsbo]

Yes in both cases. The glue is specially designed for gluing plaster to steel studs. The only requirement is that it is c/c 450mm max on the studs.

Good, thinking 30 cc for margin, the wall will be tiled on the other side, it's going to be a bathroom.

 

[Christer Forsbo]

I agree 100%

Don't complicate things with gluing; it's much easier to screw in the boards.
You can calculate the margin (a2+b2=c2), but I guess maximum 1cm so you also have a little wiggle room.

Thanks, prefer to screw if possible.