Hello!
I have already heard various opinions on this topic, ranging from "always prime," to "it depends," to "definitely not," and now I am quite unsure... I’m curious to see which opinion prevails here.
It is clear that the new screed must be properly dried before laying tiles; however, it will still have a certain (allowed) residual moisture. Because of this, some believe that priming should be skipped to avoid potential problems with the primer. But since the screed will likely continue to dry over time, can this later affect the tile adhesive and cause the tiles to loosen? Or is this only relevant at the time of installation?
And if it’s better to prime after all, is a standard primer (on an even floor) sufficient? Or is it better to use something more specialized?
Good luck
I have already heard various opinions on this topic, ranging from "always prime," to "it depends," to "definitely not," and now I am quite unsure... I’m curious to see which opinion prevails here.
It is clear that the new screed must be properly dried before laying tiles; however, it will still have a certain (allowed) residual moisture. Because of this, some believe that priming should be skipped to avoid potential problems with the primer. But since the screed will likely continue to dry over time, can this later affect the tile adhesive and cause the tiles to loosen? Or is this only relevant at the time of installation?
And if it’s better to prime after all, is a standard primer (on an even floor) sufficient? Or is it better to use something more specialized?
Good luck
Floor surfaces must be thoroughly cleaned before installing ceramic tiles, possibly leveled (evened out with a smoothing compound), and in any case always primed afterwards.
The residual moisture in the screed should not be considered in terms of YES/NO/MAYBE.
The amount of water applied with the primer to a screed surface is on the one hand very small and on the other hand dries completely within about 2 hours.
If priming is not done, possible hollow spots may form under the tiles because the water in the adhesive "gets absorbed" as it is drawn into the screed.
The residual moisture in the screed should not be considered in terms of YES/NO/MAYBE.
The amount of water applied with the primer to a screed surface is on the one hand very small and on the other hand dries completely within about 2 hours.
If priming is not done, possible hollow spots may form under the tiles because the water in the adhesive "gets absorbed" as it is drawn into the screed.
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