Screed

[S a plastering]

Hi whats the minimum depth screed over celotex insulation thanks

 

[johniosaif]

Hi whats the minimum depth screed over celotex insulation thanks

50mm in my opinion of a normal screed..

 

[malc]

we have laid 50mm but 75mm is most common

 

[johniosaif]

50mm in my opinion of a normal screed..

with fibres and chicken wire and with the celotex very flat

 

[S a plastering]

Ok cheers fellas

 

[essexandy]

I'm pretty sure that 65mm is the minimum according to building regs. It's certainly the thinnest I've ever seen on a plan.

 

[johniosaif]

The screed may be directly bonded to the base, with a minimum thickness of 40mm, laid unbonded onto a suitable damp proof membrane which is placed over the slab, with a minimum thickness of 50mm, or, if containing underfloor heating pipes a minimum of 65mm thick.
Alternatively it may be applied as a floating finish over a layer of rigid insulation material where the screed should be a minimum 65mm thick or 75mm if it contains underfloor heating pipes.
If reinforcement is required, this can either be in the form of a fine metal mesh or fibres which are normally polypropylene.
Looks like Essexandy is right...

 

[gowith]

With Liquid Screed (Gyvlon) it's:
35mm in domestic buildings
40mm in commercial buildings

 

[malc]

I'm pretty sure that 65mm is the minimum according to building regs. It's certainly the thinnest I've ever seen on a plan.

i am sure thats what the plan would read, 65mm. but with builders anything can happen!

 

[essexandy]

i am sure thats what the plan would read, 65mm. but with builders anything can happen!

You're not wrong there Malc lol