Self Levelling Compound onto Block and Beam type floor

27 Mar 2011
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Tyne and Wear
United Kingdom
Morning, in relation to tiling questions I have elsewhere, I thought I'd best ask this question for you wonderful knowledgable people to answer.

Lurking underneath the horrid chipboard, we have what is I believe called a "Block and Beam" type floor (concrete beams and blocks slotted together).

If I needed to, and assuming these blocks are grouted, and have a DPM underneath, can I apply a Self Levelling Compound directly onto the block and beam construction, or would I need to do any other prep work beforehand?

I'm looking to perhaps apply Marmox boards on top of the levelled surface afterwards.

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In general, these type of floors will have a sand and cement screed applied over them prior to a smoothing compound being laid. The smoothing compound isn't really strong rnough to cope with any movement which may take place within the block and beam.
A recent similar thread which may answer some if not all of your questions;
I tend to scan all the forums but not all the regulars may do; for tiling or floor preparation before tiling post the Tiling Forum, you’re likely to get a much better response. Also read the Tiling Sticky & Forum Archive posts to avoid making potentially expensive mistakes. ;)

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