100mm concrete versus liquid screed.

[Sandybay]

I think there could be a cost saving in using 100mm concrete as finishing screed on top of under floor heating, compared to 50mm liquid screed. 

Is underfloor as effective in concrete? 

Will be for an Icf build. 

[dpmiller]

have you the 50mm to spare?

[Declan52]

100mm concrete will work fine. It will take longer to heat up but also store the heat longer before it cools down.

[Sandybay]

Hi, 

Have to decide on how to finish the floor, not started the build yet so just checking things, had one quote for liquid screed 50mm,145sqm floor, £3,700 ex vat. 

Don't have anything to compare it to but thinking concrete would be better deal. 

[Conor]

I'm going for sand and cement screed, half the price of liquid. Issue with concrete is you'll need an awful lot of working to get it level and smooth enough for flooring, e.g. powerfloating. And getting it in to the house won't be easy. That'll soon eat away at any cost saving over screed.

Edited September 9, 2020 by Conor

[Sandybay]

Thanks for your reply its helpful, so have to have a think, still waiting on another quote for liquid screed. 

[dpmiller]

that screed quote is well over twice ours...

[Conor]

11 minutes ago, dpmiller said:

that screed quote is well over twice ours...

Who did you go with?

[dpmiller]

RTU

[Conor]

Cheers. That's who did the concrete for the basement slab funnily enough.

[Oz07]

Id probably get change out of £2500 for an 'agila' type self compacting concrete at 14.5m3

Then you have to lay it, did your other price include placing?

 

@Russell griffiths had a similar quandary recently but don't think he could get the concrete at the right money where he is?

Edited September 9, 2020 by Oz07

[Russell griffiths]

I decided on traditional sand and cement screed laid by hand 80mm thick, I’m very happy with it and glad I didn’t go down the liquid route, the quotes I had for liquid pumped screed where £2000 dearer. 

I did look at self compacting concrete but couldn’t find a plant close enough to deliver. 

 

You need to look at your time scale, my screed will need 80+ days to dry thoroughly, whereas the liquid version can be tiled on much quicker something like 14-20 days. 

 

I have been to 3 builds near me with liquid screed and I didn’t like any of them. But that’s me. 

180square metres cost me £3500. 

[Sandybay]

Yes the quote I mentioned earlier, included two site visits and the job, 

approximately 70 miles from nearest available screed.