Floor Leveling

8 Feb 2003
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United Kingdom
I intend to lay a hardwood floor in my living room, conservatory and dining room. The conservatory floor is currently 35mm lower than the other two rooms. All floors are concrete.

Rather than have a step between the rooms I'd like to raise the conservatory floor height.

What is the most cost effective method of doing this?

Thanks in advance for any advice.
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You need floor leveling compound,see this.

They are some which will go up to 40mm,can't remember the name.
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It would if you don't make waves !!! ;)
Basically its slabs of polystyrene covered with interlocking c/board floor panels, just thinking it might make up your height difference.
Ah yeah, I've seen these. Good idea. But as you say only suitable for a floating floor. I'll need to cover the entire floor with 1/4 inch ply before laying the floor anyway in order to be able to nail it down. Doubt I could lay it over the insulation without it being rigidly secured.

Thanks for the idea though.
I would buy roofing battens (19X38) and plane them by 2mm to get a 17 X 38 timber screwed and plugged to the concrete floor at 450mm centres , and then lay 18mm T & G Chipboard flooring on top which together with the new depth of the roof batten (17mm) will give you 35mm.
A different method would be to achieve the full height needed and eliminate the need to add ply to the conservatory area by fixing lengths of 22mm floorboard , screwed and plugged to the concrete at 450mm centres and then lay 18mm T & G chipboard flooring on top which will give you 40mm so when you add the 1/4 inch ply to your existing floor it will be almost spot on.

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