How Much (Roughly)?

Yeah, me too! We've had the guy before and he has fitted 5 windows: decent quality, price and standard of fitting.

But this rather knocked me for 6.

If I decided not to fit under-floor insulation, what would be the best way to kill all the draughts that come from below?

You can lay hardboard or ply on the existing floorboards. It won't insulate but will stop draughts. Easy DIY job.

Also, particularly seal under the skirting, where cold draughts and dirt blow up. I have seen silicone sealant used, white will blend with the painted skirting. Clean it out first. When vinyl flooring is laid, give it a couple of weeks to spread to shape.

BTW I have a room over a garage, and put down mineral wool when changing the floor. I think it is better for draughtproofing because you can stuff it tightly between the joists, and especially round the edges of the room, it will conform to shape with no precision cutting or foaming required, so quicker. It slightly muffles noise and is non-flammable. Also cheaper than foam slabs. Corners are not tricky.

Draughts are the problem, heat loss through a non-draughty floor is not much.

In your quote, demolish and rebuild partition might not be essential.

Just taking up the floor and relaying is a simpler carpenter or DIY job.

securespark said:

Have just clarified prices with him, as I was unsure if the refitting of the en-suite was included. It isn't.

So, the room size is 5.7m x 3.1m.

His estimate is for:

Taking down a remaining wall of the en-suite (1.7m long, half of which is a doorway).

Taking up existing chipboard floor and skirting.

Fitting 100mm Celotex under floor, then fitting new 22mm green chip floor & pencil skirting.

Re-build ensuite walls 1.7 x 1.6m including dry-lining, but not including the cost of waterproof board in the shower.

Dry line ceiling and fit polyurethane coving in bedroom only.

Skim ceiling and walls.

Provide large skip for waste.

£9200.

Are we being unreasonable in thinking that is over the odds?

Click to expand...

Sounds extortionate to me.

Yeah, me too!

If push came to shove, I could do the floor, with difficulty. But I certainly can't plaster.

A couple of years ago, I had one of my lad's rooms skim plastered. It cost £360 (Inc rad removal and replacement) and it is 31.5m².
Our room is 58.15m², so it shouldn't be a great deal more than twice that to skim it.

I was gonna say that, if you don’t know any other general builders who can give you a more sensible price you’re better off trying to DIY some of it and get a plasterer in. Or get a plasterer who’s competent at insulation/stud walls.