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barbmolly
Hi ladyrob1,
I love plywood. I have a fairly large area that I want to re-cover.
My floors are concrete, do I lay tongue and groove chipboard
sheets first, then glue sone of that ripples rubber underlay before glueing ply boards down? Not sure how to go about it
How much will this raise the floor height as I already have new carpet in the bedrooms. I was hoping to use the ply sheets in
the size 600 x 900mm, so it was like large tiles, and maybe a light stain as well. Did you ever use any pre stained varnish?
   
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ladyrob1

Hi barbmolly I just shared some of the amateur DIY that I've done in my 1900s old cottage...don't have to comply with any new build reno rules...I just went with what I felt would work in this old house. I had no prior experience. Don't know what to tell you about laying ply on concrete floors...mine were 100yr old VJ pine floor boards and the cottage is on 3ft piers so plenty of ventilation underneath. I live in rural Auatralia in Queensland in a river valley with lots of underground water and people make good use of it by constructing wells...so the climate would make a difference. Under my house can be quite humid at times...hence the elevation off the ground and the ventilation. Apart from these factors I would not go near tongue and groove chipboard for anything I wanted to last......in my opinion and little experience its a man made product stuck together with glue and is prone to moisture damage and does react to moisture in the atmosphere.

I see a couple of problems even though I am a simple DIYr. Firstly....I think if you want to cover a concrete floor with anything I'd consult a professional especially if floor levels in adjoining rooms will come into play. Was watching a TV programme called The Block...amateurs doing up an apartment building as a competition project employing tradies for the technical work.

One duo put down a framework of timber over a concrete floor, installed underfloor heating, laid ply sheeting over that and finished with what appeared to be "click clack" wooden floorboards....something to consider. They encountered a problem with the level of the whole floor when compared to that of the common hallway outside the doors of the rooms where they did that floor. The doors had already been installed so hey had to pull up a section of the floor close to the door, grind down the concrete, replace the wooden framework and the heating and the floorboards.... all for a few milimetres discrepancy...so apparently levels are really important.

MY DIY job was not regulated at all...its a very old cottage in a remote rural area and I could do what I wanted a bit at a time...no tradies but I did ask a lot of advice.

Firstly, I was working on 100yr well seasoned floorboards that were tinder dry and not likely to suck up moisture. I had the whole floor sanded since some of the floorboards were not level.

Then I gave the whole floor a couple of coats of sealer, lightly sanded it all to give it "grab" then glued down genuine rubber backed carpet...(probably not available today. It had a very low close pile much like carpet tiles today....and these could probably be used today....you'd need something with a bit of "give" when you walked on it and so it wouls soak up whatever glue you used over it.

Over the rubber backed carpet I glued 5 ply "tiles" I'd cut to shape to fit together . I then stained each tile individually giving it a decorative woodgrain design...just stain, no varnish at this stage....for decorative purposes. The varnish was then applied to each tile individually and when all dry...to the whole floor with a woollen covered spatula on a broom handle. I keep this floor in good nick with an occasional rub with a mixture of good quality Linseed Oil and Kero.

Not at any stage did I use tongue and groove chipboard on the floors .....
but found large particle chip board good for kitchen benchtops.

Sorry barbmolly if this is not explicit enough...but I think you should consult a professional as this RENO was a totally "hit and miss" exercise driven by my lack of funds at the time and my enthusiasm for having an old house to play with.

What I did was very time consuming hard work on my knees most of the time. Its not something you can do by "cutting corners". Good for smaller areas and is by no mean a professional job....but it look great!

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ladyrob1

P.S To barbmolly...why don't you consider consulting a professional about laying Oriented Strandboard on your concrete floor...depicted and described above.

   

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