After a century, it's still standing, but its bricks have begun to drop and break as, little by little, its lime mortar, exposed to temperature swings, crumbles and powders.

一个世纪之后，它还依旧耸立，但砖块早就开始剥落，一点一点地裂开；石灰砂浆也是如此，温差变化使其碎裂为粉末。

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The training on offer includes working with traditional timber windows, lime mortar walls and slate and lead roofs.

BBC: Traditional skills training offered in Highlands

They heated up all the old nails to straighten and reuse them, reused the old foundation stones, recreated the same lime mortar as originally used and had handmade windows made just as they would have been in the 18th century.

WSJ: Moving Heaven and Earth for a House��WSJ Mansion