Hi. I've got a patio, about 12'x8' with a flat roof extending off a slightly pitched roof (house). The house faces east and the patio roof extends off the the rear (west) of the house and along the south side of the garage. The downspout drops off the southwest corner of the roof, but the pitch is sending the drainage to the southeast corner of the roof - where there is no support beam (it attaches the the house about three feet from the corner) or downspout (the south gutter actually has a 1" pitch to this corner! and is about 16' long). It seems the logical thing to do would be to take off a few inches of the 4x4 support beam to which the downspout is attached (SW corner) to get the water to drain properly.

PROBLEM: How do I do this without damaging where the flat roof is attached to the house? Or is there a better way to accomplish this (ie: just lowering the gutters themselves to correct the pitch.)?

Any help is much appreciated. P.S. - This is in Denver - lot's of snow!

 

Add a downspout at the low end of the gutter.