Insulating a concrete floor

[diyersgirlfriend]

Hi

I'm looking for a bit of advice and excuss my lack on knowledge on correct DIY names

My boyfriend has insulated the house we've bought. He's took lots of advice from a number of folk and construction suppliers he's been dealing with. The floor we are insulating is solid concrete

The way he's done it is:

Put Damp Proofing Membrane down

on top of that laid a wooden border round the rooms then strips across the floors (cant remember the type or size of wood)

then in between that he has laid the polystyrene 25mm

then put chipboard or plywood or some kind of wood on top and nailed it into the border/strips (excuse my lack of DIY names)
is this how you would do it?

I've been speaking elsewhere and a chap mentioned about a vapour check

i'll try and get photos uploaded

 

[Deluks]

OK, but 25mm of insulation will be a bit pants. There was no need for any timber support under the floorboards as the polystyrene will easily take the load.