Britain is probably the only country in the world that does not as a rule build solid masonry walls. The original idea was to avoid a transfer of water to the inside of a building by having the "cavity" between two skins, but now we fill it up with insulation surely defeating the object. The construction results in the abomination of stretcher bond everywhere and absurdly complicated and expensive devices to throw water out that has penetrated the outer skin. What architect would build cavity construction if it were not for the Building Regulations?
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