Insulating small bathroom in stone cottage

11 Apr 2014
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United Kingdom
Looking for advice on insulating a small bathroom in a stone cottage. Bathroom has 2 external walls(2' stone) and one internal. I want to save as much space as possible but don't want it feeling like an ice box.
The floor is concrete(2 levels approx 30mm difference). My questions are as follows;
1. Insulating the concrete floor? what is the best method? Do I require to place a DPM on top of the concrete before insulating boards?Kingspan/ celotex or similar.

2. The internal wall is a nice stone and would make a good feature. Would I be able to leave this as is?(can I treat this to allow for the moisture/condensation(would this effect the wall on the other side that will be insulated(Celotex/Plasterboard). This will be on a wall that will have shower spray.

3. how best to insulate the 2 other walls without losing much space(room is approx 1500x 2500). Wood stud/metal stud? Dot and Dab?

4. What heating would you recommend for this space(only option is electricity)

Thanks in advance for any assistance.

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1. What do you plan on putting on top the of the insulation?

2. No - not with running water from a shower

3. Stud, vapour barrier and insulated plasterboard

4. Ermm - electric heating ! (underfloor/convector/oil-filled towel rad/fan)
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