Builders Subfloor Suggestion

Hello Chaps

I've got a job in the pipeline to lay/sand/finish parquet flooring to approx 33m2 thru lounge/diner.

The room is having a new concrete subfloor 100mm sand/cement jobby, the customer wasn't entirely thrilled when i mentioned that the concrete will need approx 150 days to properly dry before a new wood floor is laid...he's since spoken to his builder who has come back to him with the following spec...

Please could you ask your flooring company that if we did the following
would it reduce the drying time of the floor?

Place Viscreen under 100mm concrete, then place timber batons with a 70mm
Celotex (or equivalent) insulation in between, topped off with 22mm flooring
grade chipboard.

Any thoughts on the above possible solution boys ??

He's thinking of having a 500mm + Chevron Parquet laid.

Regards Gary

 

it's still got to dry out

 

Completely agree, no way i'm gonna do any shortcuts to help the builder out cos it will invariably bounce back to me when the floor starts going wrong...

 

Tell the builder to use topcem pronto from mapei. Can lay on it after 4 days. I did an engineered herringbone a few years ago and laid over a 60mm one with ufh after 10 days.
Does something with the moisture. The term I remember is encapsulates it

 

How did you get a price for it Trimmer? I asked cfs for weeks and they just couldn't sort it out?? Lost the job in the end due to the poor service from cfs!

 

I bought a pallet of them a few months back. Had to moan to get the price, but was delivered next day.
There terrible for getting back with prices !

 

Hi Trimmer

How long after the slab is laid before you go over it with the Mapei Topchem Pronto ??

 

Is it a new concrete slab with a bonded or unbonded sand and cement screed,
What the builder has specified you could lay on in my opinion, but would make him use T&G fair face ply
Or use an unbonded quick drying screed with plastic DPM interlayer
Lots of quick drying screeds, Ardex 35 cement mixed with sand,
Drys to walk on in a couple of hours, have laid Lino on 100mm screed next day
Mapie, uzin or k screed

 

So bad....must of asked the rep 6 times over the course of 2 weeks, waiting for Mapie to get back to me, couldn't work out the ratio, didn't get a price. The Portland cement would of dried by the time that lit sorted out a rapid screed

 

Well, you didn't ask the right people did you now.. :cry

 

Mate, I should of gone to the main man!