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I want to put on an exterior wall of concrete cladding covered with cement, a concrete brick facing of two centimeters thick. The wall has some cracks filled with silicone. Is this style of facing resistant to weather, frost, knowing that this second home is located in Normandy?

Concrete facing bricks containing calcite are highly resistant to frost and weathering in general. Before laying your siding make sure they do not evolve. Silicone is not really the solution for resealing and stabilizing. It's a bit of a "cache-misère". If they are stable cracks, widen them with a triangular scraper, remove the sealant and relock the crack with a coating intended for the outside. After complete drying, you can consider sticking your siding taking care to moisten the support beforehand.

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