Flat Roof To Pitched Roof Transition

This is a fairly common roof detail.

Flat roof to pitched roof transition.

We re going to do a pitch transition or change. Measure 1 1 2 from bottom edge of transition flashing. 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. Install bottom roofing panels first 2.

A roof pitch transition is a line in the roof plane that changes pitch. 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. A very important detail is where the flat roof is connecting the pitch roof. They would be more accurately called low slope roofs.

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. With the proper roof slope and drainage installation precipitation is not a problem for buildings with flat roofs. See the illustration below. We see this quite frequently in log home roofs with porches for example.

Armourfix and armourvalley membranes must be installed and extended 60 90 cm up the main roof underneath the shingles in order to assure a waterproof connection. Pitch transitions are a common roof detail. However flat roofs are not really flat. 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.

But in cases where it is visible and either the homeowner or an architect doesn t want to see a big exposure the self sealing characteristics of epdm or tpo the low slope roof membranes we typically use will provide some measure of. Transition flashing installation guide 1. Getting water off a flat roof sounds like a tricky scenario. 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.