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tiling over old floor tiles


Steve Last

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If your old floor is not sound then for belt and braces security first clean with a neat or dilute solution of hydrochloric acid followed by a "primaire d'accrochage" and if the old surface is not reasonably level (like mine which was laid on a bed of sand) then use a "ragreage autolissant".

The primaire d'accrochage is also recommended if laying tiles or ragreage on top of green concrete.

A great tip for grouting is to mix it very wet, spread it around with a raclette, relax with a beer for 45 mins - 1 hour and then pour sawdust on top, finally sweep up with a fine but stiff broom. No cleaning needed and leaves the joints looking perfect.

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thanks for the suggestions - the old floor is sound but 15 cm sq terracotta tiles and not 100% flat, the new tiles are 30 cm and I've found that when just put on top dry to check layout, they rattle a bit. I think the cement should take care of it, but might try something else like the "ragreage autolissant". as well.

Thanks again.
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