Flat Roof To Pitched Roof Transition

Getting water off a flat roof sounds like a tricky scenario.

Flat roof to pitched roof transition.

After bottom roofing panels have been installed set one piece of transition flashing down where the top portion non hemmed of the transition flashing lies flat on the upper roof 3. This latest project was in early december in lambeth ontario for a residential home that had an existing sloped or shingled roof that needed to tie into a ne. Pitch transitions are a common roof detail. We need to do something where that change happens so the panels can go down and water can come off hit the lower slope and come off the roof.

The starter strip and first row of shingles must be applied 25 cm from the bottom of the slope roof or main roof above the slope transition. We re going to do a pitch transition or change. Transition flashing installation guide 1. A roof pitch transition is a line in the roof plane that changes pitch.

However flat roofs are not really flat. A very important detail is where the flat roof is connecting the pitch roof. Measure 1 1 2 from bottom edge of transition flashing. In many instances the lower roof is deep enough that the exposed roofing isn t visible from the ground.

They would be more accurately called low slope roofs. Install bottom roofing panels first 2. Most roof leaks on both flat and pitched roofs are due to failed flashing pieces of metal or other material covering joints between a roof plane and intervening elements such as walls vent pipes chimneys dormer windows etc it s also common that a flat roof of sound design and structural condition leaks simply because the roofing. The roof plane goes from one pitch to a lower pitch.

See the illustration below. This is a fairly common roof detail. You ll have a steeper part of your roof turning into a lower slope so there s a steeper pitch up top and a lower pitch on the bottom. With the proper roof slope and drainage installation precipitation is not a problem for buildings with flat roofs.