George wrote:
We have a roof problem that could most easily be solved by doing
somethign that would lower the pitch from 4:12 to 3:12. I keep hearing
that 4:12 is the "minimum" pitch for a shingled roof. But, that's also
what it was in the Stone Age.

I wonder if that rule still applies, if I underlaid the whole thing with
a bituminous membrane (aka "ice and water shield")?


In conjunction w/ Colbyt's suggestion, look at the manufacturer's web
site for information. IIRC, most have instructions for minimum slope
installations and also minimums. I was thinking 4:12 was a little
steeper than what I recalled them stating, but I could be wrong (and
didn't go look).

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