plasterboard and insulation for a guest bathroom.

[Greg_0ry1]

Hi there,

I am currently working on our downstairs bathroom and need some advice regarding plasterboard choice and insulation. I have removed the old plasterboard as I could not remove the tiles without damaging the plasterboard and removed the old insulation which wasn’t great to be honest. So I am ready for a fresh start but would like some advice on quality material.

Below some images how it looks at the moment.

Any advice is greatly appreciated.

Thanks

 

[thomp1983]

Rockwool type slabs in the stud wall, if the block wall is a cavity wall it won't require insulating.

Tile backer board in the wet area then normal plasterboard for the rest.

 

[Greg_0ry1]

Rockwool type slabs in the stud wall, if the block wall is a cavity wall it won't require insulating.

Tile backer board in the wet area then normal plasterboard for the rest.

Thanks, the block wall is insulated indeed and the previous person has just put plasterboard on it with some kind of mortar glue. Is there a better way without compromising on space? Something I can apply on the wall straight away making sure it comes not down in me due to the weight of the tiles later on?
Thanks

 

[thomp1983]

I'd probably use plasterboard expanding foam then once it's gone off drill a few holes in the board, then into the block and use screws and wall plugs to make sure it can't go anywhere.

Soudal Genius Gun Plasterboard Adhesive Foam

Soudal Plasterboard Adhesive Foam is a fast curing replacement for traditional mortar adhesives. Use it to fill cavities and for bonding plasterboard to walls. You'll find that this foam is suitable for use on all common materials such as concrete, stone, plaster and wood.The adhesive comes...

www.toolstation.com

 

[Greg_0ry1]

Thanks, the last question I promise

As this will be a second bathroom even we won’t use it too much what would you use for the floor before tiling?
Thanks

 

[thomp1983]

What is the floor made of?

 

[Greg_0ry1]

What is the floor made of?

Normal concrete the way I see it

 

[thomp1983]

If its sealed just tile straight onto it

 

[Greg_0ry1]

Rockwool type slabs in the stud wall, if the block wall is a cavity wall it won't require insulating.

Tile backer board in the wet area then normal plasterboard for the rest.

Good morning @thomp1983,
I finally purchased the insulation this morning and was hoping you could confirm something for me.

I have chosen sound insulation as the two walls which need new insulation are to the kitchen room and floor so nothing to the exterior walls which are insulated anyway. Those on the image are the correct ones right? Maybe another question, what is the best method to cut them into the right size?

Thanks in advance

 

[thomp1983]

Looks fine, I hold the slab upto the space it's going in make a couple of cuts in the edges with a Stanley knife at the right size then put it on the floor or a trestle and cut fully to size.

If anything try to make sure your cuts are bigger than the spaces, you can squash it in if it's slightly big whereas trying to cut small pieces to fill in is hard work.

Id also recommended wearing long sleeves and gloves whilst doing it.

 

[Greg_0ry1]

Looks fine, I hold the slab upto the space it's going in make a couple of cuts in the edges with a Stanley knife at the right size then put it on the floor or a trestle and cut fully to size.

If anything try to make sure your cuts are bigger than the spaces, you can squash it in if it's slightly big whereas trying to cut small pieces to fill in is hard work.

Id also recommended wearing long sleeves and gloves whilst doing it.

Thank you mate, this is super helpful

 

[Greg_0ry1]

Thank you mate, this is super helpful

@thomp1983 I am finally donw with the basic’s even I have a small bump due to the socket but it will not be a problem for the plasterboard so will leave it this way.

Out of your experience, would it make more sense to buy 1.2 x 2.4m or for easier handling smaller? I am unsure how stable they are and don’t want that they break when carrying.
Thanks

 

[thomp1983]

I'd use 1.2x2.4 boards if you can get them home and into the work area comfortably.

The disadvantage with smaller boards is they will cost you more.

 

[Greg_0ry1]

I'd use 1.2x2.4 boards if you can get them home and into the work area comfortably.

The disadvantage with smaller boards is they will cost you more.

Yes, I have read up about it and most people recommend the same. You have also more joints and it will take longer so will give it a go.
Thanks