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I'm fitting a frameless shower enclosure with two hinged doors on a new bathroom, which has been tiled onto 12mm hardiebacker with 90mm celotex insulation between studs (exterior wall) behind the hardiebacker. Unfortunately I forgot to put a stud behind one of the sides where the two shower...

Laid a 4mm layer of Mapei Ultraplan slc but need another layer to build up the floor. Can I simply prime the first layer (planning on 3:1 ratio of water:Mapei Primer G) and lay the second layer on top? And how long should I wait for first layer to dry? Been 24 hours so far

Interesting thanks, seems there are varied opinions here on which is better out of 70mm studs with 50mm wool + gap.... vs 75mm wool Either way seems like 70mm studs is still the better option vs 50mm studs (whether I use 50mm wool or 75mm wool) so at least I've got that decided!

Why do you say that, if this spec complies with building regs even at the 50mm wool with 50mm studs option?

If I went with the 70mm metal studs, would 50mm acoustic wool be better than slightly packed 75mm thick acoustic wool? I've read loosely packed acoustic wool is much better than tightly packed as loose wool absorbs sound better... but wondering whether that would be the case in this scenario...

Am building a stud wall and very limited for thickness. Planning to use metal studs as its easier to construct. It's a wall separating two bedrooms so need it to be acoustically sound. I will be fixing acoustic plasterboard to either side and fitting 50mm acoustic wool in between. Would 50mm...

Hi Ken, The area was not wet. However there was paint bubbling in this area, as well as a few other corners on ground floor walls so I paid for a damp survey last week (by a very knowledgeable surveyor who had no damp proofing to sell). He peeled off paint where it had bubbled and revealed...

Couple of areas in my house I need to repair - one shown below: Had to hack off some of the multi finish on this one, what would be the best way to repair? The paper layer has also come off the plasterboard so I can't reskim the current surface. Would it be blue grit and then multi finish...

To add, the plasterboards I have are all 12.5mm thick and all walls and ceilings will be skimmed

I am boarding out a new loft and had to buy the smaller 1800mm x 900mm plasterboards as there was no way to get the larger boards up to the room. However the builder (who completed the shell of the loft for me, while I am doing all internals) has built 400mm stud centres on walls, with noggins...

I guess it's the weight yeah/issue of having PIR in between the Hardiebacker/plasterboard and the studs. I didn't think it would be an issue especially as its only 15mm PIR, however Hardiebacker told me their products should be fixed direct to the studs or battens. I'd rather be safe than...

Studs are at 450mm centres I'm thinking to put 20mm Marmox board in the shower area instead, and continue with the 15mm PIR behind 12.5mm moisture resistant plasterboard on the rest of the external bathroom walls (and just moisture resistant plasterboard direct to studs on the two internal...

Thanks, when you say you have 50mm Celotex over wood, is that boarded and tiled? I wasn't concerned about it until I called Hardiebacker this morning just to double check and they told me their boards need to be fitted direct to the stud, not what I wanted to hear... However I'm sure this is...

I have a studded bathroom with 90mm insulation between studs and 15mm insulation over the studs, which I intend to board and fully tile. Want to fit 12mm Hardiebacker board in the shower area and 12mm moisture plasterboard on the rest of the walls, then tile. Just called Hardiebacker and they...

I've already put the 25mm under rafters and ceiling joists...so am specifically after advice for the walls. Although your post has thrown me off a little - why would a badly insulated loft be hotter than a well insulated loft? Doesn't the insulation keep the heat in? So you think I definitely...

To add, the external walls are mainly tiles on OSB, with render on OSB on the gable wall

To add, the external walls are mainly tiles on OSB, with render on OSB on the gable wall

I'm DIYing my loft conversion (builder built the watertight structure and did roofwork, I'm doing all internals). It's hip to gable with a rear dormer. Insulation wise, I have 90mm Celotex in between external studs. I am thinking whether or not I need to use 15mm OVER the studs too, or if it's...

There's ventilation in terms of trickle vents in windows, and will be an extractor fan in the bathroom, if that counts. I've already purchased moisture plasterboard for the bathroom which I can't return as I cut in halves to fit them up the stairs. Wish I knew about the marmox board earlier...

I reeeally don't want to mess about with the plumbing as the waste pipes took me a long time to get perfect so I could fit a slim profile shower tray without much trouble and without raising it with an easy plumb kit...plus it would involve ripping off my glued down flooring to do so as you can...