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Reply 2 on: April 14, 2009, 05:48:55 AM »

A roof covering is part of an building envelope. It is the covering on the uppermost part of the building or shelter which gives protection ...

Reply 2 on: April 14, 2009, 05:48:55 AM »

A roof is part of your building envelope. It is the covering on the uppermost part of your building or shelter which provides protection fro...
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