My conservatory gets finished this week, and I wanted to lay some >floor tiles ASAP. >
>I was under the impression that I could do this straight away, but I
>have just read the 'Topps Tiles' brochure which says that a new
>concrete floor should be left 6 weeks.
>
>However, its not quite as black and white as that as the base of the
>conservatory is a 'raft', so the floor (Slab) was laid at the same >time as the footings.
>
>This part was finished exactly one month ago today and considering the
>heat that we have had over the past few weeks, I would guess that its >dry by now. >
>Once the plastic has gone on, the builder is coming back to lay approx
>80mm of screed onto of the concrete that he laid a month ago.
>
>How quickly can I lay ceramic tiles onto this 'screed' layer? I would
>understand leaving it for a few weeks if laying laminate, but didn't
>think that tiles would be a problem.
I had a very similar scenario of timescales and was told to leave the screed for 3 weeks before laying tiles. This was done and it has been fine.
>I was hoping to start as soon as next weekend but should I wait a >while?
Yes. One thing that you may well find useful is to wash over the floor with a 1:5 solution of PVA adhesive to water. This will provide a light seal and stop the release of dust.
>If I need to wait, is there anything that I can do to speed up the
>'drying' process (i.e a de-humidifier)?
It isn't a drying issue, but a chemical curing one. The screed should be allowed to do that naturally.
>If I should wait, but choose not too. What are the implications of >this?
The tiles may well lift.
You should wait......
.andy
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