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Thanks again for the reply, the copper is soldered and i have also wrapped plenty of tape around them. I will go with the battons with insulation in between and then 18mm ply. The only thing I'm thinking over is the DPM as there is one already below the concrete slab, if I out one also...

Thank you both for your suggestions, I will go with that approach tben, if I put a DPM down under the battons and then screw batten down into concrete I'll be piercing the DPM where the screws go through, will this matter too much? Also the CH pipes on the floor I plan to just insulate...

I have a little downstairs loo I'd like to raise the floor level of. It's a concrete slab and I can see the DPM coming up from the sides. I'm am not sure if there is insulation under the current slab or not. I need to raise the floor level by about 75mm to a finished tile that will meet a...

Thank you for suggestions, how would I affix the chipboard to the celotex? ...I would be tiling on top so need the sub floor to have as little movement as possible. What I don't know is what is under the concrete slab, it could have insulation beneath the concrete already in which case I...

I have a downstairs loo which is a concrete floor which I need to raise about 50-60ml or so. I was wondering what the best way of doing this was and whether I should also take the opportunity to insulate the floor too. Any suggestions would be appreciated

I have recently had my bathroom re tiled but the Ardex fkexible grout used has dried different colours. In some places it's dark grey and in other a lighter grey (almost white). What caused this and can I do anything about it?

No scratch coat. Just pva'd the brick and then straight on with a render mix 5:1:1. (Sand, cement:lime) and fairy liquid in mix too.

That's really pleasing to hear. Should I wait a certain number of days for render to cure and cracks to finish developing before moving ahead with skim?

I recently rendered my two chimney breasts which were solid brick with sand/cement/lime mix (5:1:1). The plasterer also used fairy liquid to help make it easier to work with. The wall was pva'd and then the cement render put on. The plan is then to use a multi finish skim over the render...

Would red plugs be ok. It's just I have a box of red that's all. If not I'll go and get some brown

Ok that's good to hear so I won't penetrate the DPM. Will drilling a hole, using a wall plug and then normal screws suffice? Or are rawl plugs not a good idea and I should be using concrete screws?

I'm looking to box in some pipes in my downstairs loo. The floor is concrete and there is a polyurethene sheet beneath the concrete acting at the DPM. My question is what is the best fixing to use to fix the wooden batten to the concrete floor ? I'm worried if I just use concrete screws I...

I assume the consequence of having boards that are not solid is that the plaster could crack if walls are leant on.

To be honest I don't know how much bounce/movement/flex in a plasterboard is acceptable in order for skim to go on ok and not crack or cause mad problems.

I had rising damp on a few downstairs walls. Damp causes such as guttering and soak aways have been improved and I have had a new DPC installed. My walls are very uneven and the bricks used in my house are like air bricks and are very difficult to get a true fixing too. With it difficult to get...