I am negotiating to buy a home that has a patio enclosure.
But its roof is just an aluminum "standing-seam pan" cover,
without any supports except the wall posts. Very bogus.
The enclosure is 18 ft x 15 ft, and the aluminum pans are
thin (maybe .035), and when I apply about 100 pounds to
a 'rib', it deflects downward more than one inch. (and twists)
This is obviously an illegal and unsafe flat roof.
The snow/ice loading used for Ohio is 30-40 pounds/sqft.
And a person clearing a snow drift adds a concentrated and
The owner says the roofs passed city inspection, so all is fine.
I don't want to pay for a structural engineer, so I need proof
that the roof must have joists, and purlins or decking.
(proof that any kid can understand)
Does the International Residential Code spell this out in a
clear way ?
I have found examples and specs, but I need to convince fools.
-- Any solid info appreciated.