I have waited more than 2 weeks since the screed was layed in my
>conservatory and have decided to start tiling (one week earlier than >advised). >
>To be honest, the top surface of the screed is already wearing off, so
>I am doing more damage leaving it un-tiled.
>
>So, today, I diluted some PVA (Approx 5-1) and brushed it onto the >floor. >
>To my surprise, the floor was like a sponge and sucked all the
>water/PVA in.
>
>There were a few spots where the PVA sat on the surface and slowly
>soaked in, but the majority of the floor just 'ate' the PVA.
>
>I have therefore decided to brush another coat in before I tile, but I >have 2 options: >
>1. Do it tonight, so that its completely dried by the morning and then >start tiling. >
>2. Do it first thing, leave it an hour or so and tile whilst the floor >is still damp? >
>Also, how much should I be putting down?.. Because of the absorbency
>of the floor, I used 3 or 4 buckets full, for a 10m2 area.. I am
>hoping that as the first coat has gone down, the 2nd might not soak in
>as much.. Should I be brushing it on lightly, or lashing it down??
I waited three weeks, as recommended, and then had a similar experience with the PVA. The first coat certainly soaked in heavily and I applied a second which soaked in more slowly.
I would do it tonight, but I don't think that you need to be concerned as long as the surface is sound. If you run a vacuum cleaner over it, you should find that realtively little dust is released.
.andy
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