Flooring question

Mayo self-build

My carpenter has suggested that I consider putting wooden floors onto a double battened sub floor, rather than going with a screed. He is suggesting putting the insulation between the battens, and then rather than putting screed on top of it, to put another batten across the lower one, followed by more insulation, and then nail the wooden floor to the battens.

He suggests using normal screed in the bathrooms, but to adopt this other approach in the rest of the house...

My question is - has anyone else done this? Will it work ok? Does anyone have any thoughts on it?

ircoha

A few questions if I may:
Is this a single story dwelling? [ Timber floors could be v noisy upstairs]
Is this the only insulation that will be in the floor?
What thickness is each batten?
What type of insulation is being used?
Will there be a vapour barrier anywhere in the 'sambo'?

In the floors where the screed is being used, is there any insulation?

In any event, there will be a certain amount of cold bridging from the subfloor to the timber floor with this setup, I am assuming no insulation in the subfloor.

It will be a lot noisier than a floating floor with suitable underlay.

I would have concerns about this construction not being ventilated with all that timber

I would not like it as a method

galwayrush

I would prefer to screw Plywood to the crossed battons, ( each 2 x 2 )then Foam underlay and float the solid floor on top.

silasrat

insulating between batons is a great idea and can work really well as long as u use damp proof course between the batons and whatever subfloor they are on to prevent moisture transfer and eventual deteriation of the timber.
also,plywood scrrewed onto the batons and then underlay then your timber floor..... nice and cosy for the winter!

Mellor

silasrat wrote: »

insulating between batons is a great idea and can work really well as long as u use damp proof course between the batons and whatever subfloor they are on to prevent moisture transfer and eventual deteriation of the timber.
also,plywood scrrewed onto the batons and then underlay then your timber floor..... nice and cosy for the winter!

the DPM will be further down, there will be now moisture in the slab, or shouldn't be.
"nice and cosy", the battons will reduce the thermal resistance. Then there is the ventilation issue.
More info is needed, as highlighted by irocha.
I don't really like it either

smashey

Mayo self-build wrote: »

My carpenter has suggested that I consider putting wooden floors onto a double battened sub floor, rather than going with a screed. He is suggesting putting the insulation between the battens, and then rather than putting screed on top of it, to put another batten across the lower one, followed by more insulation, and then nail the wooden floor to the battens.

He suggests using normal screed in the bathrooms, but to adopt this other approach in the rest of the house...

My question is - has anyone else done this? Will it work ok? Does anyone have any thoughts on it?

Has he said why he wants to do it this way? It seems to me he's only trying to make more work and therefore more money.

Mayo self-build

Many thanks for feedback so far...

The house is single storey, and there is no other insulation already in the sub-floor. My engineer is recommending 75ml of Kingspan-type insulation to go on top of sub floor - I intend to do this throughout the whole house. Not sure about thickness of battens... He did mention the need to use a vapour barrier.

He has recommended this approach as he personally feels that wooden flooring on top of a screed is very 'hard' and he likes the bit of 'give' that approach allows.

I don't think he's looking for extra work - he's a mate and has kept me right so far. But in any case, wouldn't this work out about the same price as a screed?

I appreciate the advice and feedback.