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I'm still probably going to go for the timber battens approach, but I've just stumbled across this website this morning which recommends T&G straight onto the insulation then 15mm Ply. Anyone think this is pants or OK...

"I'm going to take a wild stab in the dark here, and my guess would be approximately....................102.5mm." ^ like he said ^

The red/orange lines are engineering bricks There is an 80mm cavity filled with rockwool between 2 of the walls, 1 is a solid brick Party Wall & 1 is solid brick gable end with a 2x2 timber stud wall & 50mm Kingspan between the batts. Just noticed I messed up & have shown the double skin...

I had thought of screeding up to the tile height but just hoped there was a way I could get some insulation down there so the bathroom floor isnt absolutely freezing in the winter!? 2 of the walls are internal/party walls, single brick with no DPM. 1 external wall is double skin breeze block...

No theres defo no DPM as there is a hole in it going rite down to the earth underneath in the corner where the water pipe comes in to look at. Also I'm sure the concrete deck in there was basically the back yard's ground originally and the bathroom was simply built onto it, the ground even...

Hi I'm about to start renovating a small ground floor bathroom. I've inspected the walls and discovered there may be two corners which are going to be subject to Cold/Thermal Bridging, which I've shown with blue dots on the diagram bellow. Will this bridging be bad enough to justify doing...

Doh much better reply beat me to it :lol:

Suppose it really depend a lot on what joists, support etc you have up there. I will be putting in a 5 and half foot tank into my house that I'm busy renovating and will also have sump tanks etc under it. The house is old with small joists so while I had the floors up sorting that out I also re...

BUMP :) Dose anyone have any advise on the matter of piercing the DPM with the screws that would fix down the batten to the concrete? Would it be an issue? Cheers. Gary.

Yes I seen this stuff which is what made me wonder if rigid insulation/backerboard dose compress at all with a decent sized tile stuck to it, thought a company like Marmox would have done their research? Yeh I already have a load of 60mm Kingspan 8x4 boards so was wanting to use them as it...

Thanks for the responses :D O dear I suspected I'd be messing on with battens and ply sheets etc :( So what are the main problems with backerboard stuck onto rigid insulation, would the kingspan eventually compress under the weight of people traffic, or is it mainly to do with the...

Cheers for the info marra :wink:

Anyone? :)

Hi I am about to start work on a ground floor bathroom that currently has an old concrete deck(no DPM or insulation etc). I'd like to raise the floor a bit anyway to make it level with the adjoining room so I was thinking of: laying down a DPM, then some 60mm kingspan boards, then clagging 10mm...

Cheers for the constructive reply RonnyRaygun :wink: No need sorted it all out today with me old man who works for cups of tea and managed to get a 178 x 102 UB on the cheap off Gumtree, the floor/ceiling seems solid (will have to give it a proper bounce test once it has all set). Me is 1...

:D Yes I'm very aware that every single post involving anything like this ALWAYS has to have these comments. Big pile of rubble is a tad of the over dramatic thanks, I'm not a total f*@k wit ta and the only problem would be cracking some plaster on any finished ceiling that I put in when I'm...

:lol: not a half bad idea!!!

The RSJ would be on a sat on a brick wall each end with just under 4 meters span between the walls. It would be supporting the middle of about ten 4" x 2" wooden joists which are 3 meters long and spaced about every 400mm. 1.5 meters to the left of the RSJ would be the roof's king post and...