Hello all, 

 

new here, stumbled upon as i'm looking for advice and well i couldnt find an answer via google so I thought let me join and see if anyone can help and share experience.I like DIY, lockdowns been good, new cloakroom shower and toilet upstairs, and bath downstairs all fully tiled and plumbed, artificial grass installed in the garden too :D 

 

I need to floor over the existing concrete and was thinking underfloor heating and laminate.  I dont think the extension that was done was insulated well enough as the room gets cold.  I have put thermal plasterboards on the walls and skimmed, but i wanted to ask whether i should damp proof then OSB board or plywood down before the underfloor heating?? any thoughts? has anyone done anything similar that can advise me on?

 

thanks in advance

Welcome. How much spare height have you got as you should ideally put insulation in assuming you’re going electric UFH as it will just be heating the concrete slab otherwise. 

Welcome.

First thing to know when it comes to heating, is the heat load needed.

This can be either measured with a known heat source, two thermometers and a stop watch.

Or calculated from first principles if you know all the details about the construction i.e wall, window/door, floor and ceiling/roof u-values. 

It is always worth doing this anyway, it takes the guess work out of it.

Welcome. How much spare height have you got as you should ideally put insulation in assuming you’re going electric UFH as it will just be heating the concrete slab otherwise. 

thank you

 

I have about 15-20mm drop between the kitchen and the room which is being renovated