posted by [identity profile] juuro.livejournal.com at 11:28am on 2004-02-25
When my father and I redid the roof of his vacation home, the manufacturer's instructions seemed to imply something like up to five layers, depending on the condition of the lower ones. It was not terribly clear, though.
 
Most building codes, I think, have a limit of 3 roofs before you have to remove it all...

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