Guttering Between Two Pitched Roofs

You want at least a quarter inch of slope for every 10 feet.

Guttering between two pitched roofs. Roof pitch is very important for right roof gutter sizing. Take one look at a pitched roof versus a flat roof and the structural differences are quite obvious. Once you know pitch you can find your roof pitch factor in the table below. The steeper a roof s pitch the more windblown rain it can collect.

Get 7 or 8 inch gutters. A valley gutter is where two main roofs meet or where there is a change in roof direction. Increasing the pitch increases a gutter s handling capacity but the gutter may look askew over a long run. The detail can be formed using preformed polymer based products traditional lead work or more modern lead replacement flashings.

A bonding gutter refers to a detail which weathers the vertical junction between different roof coverings. A 5 inch gap for instance is a 5 in 12 pitch. They ll cost more and probably require a custom order through a professional installer. Pitched roofs have peaks and valleys that direct water downward in very specific directions.

If there s standing water it s not pitched properly. Increase the pitch of the gutter. For example between a double lapped plain tile and a single lapped large format interlocking tile. Get on a ladder after a rainstorm and look in the gutter.

The standard is about inch per 10 feet. The valley gutter problem areas can be made worse where there are surrounding trees and associated leaves and branches that can block the valley gutters up. Hold one end of the level against the roof level it and then measure the distance between the roof and the underside of the level at its midpoint which gives you a 12 inch run. You can measure pitch with a 2 foot level and a tape measure.

Gutters need to be pitched toward the downspouts for the water to flow properly.