Pitched Roof To Flat Roof Transition

How to measure a roof slope.

Pitched roof to flat roof transition.

There are a few ways to dealing with a pitched roof if you choose to convert to a flat roof. At the roof transition shown in photo roofers had installed peel and stick over the epdm lap. So it would be more accurate to consider a sloped roof v s. The standard way to measure a roof s pitch is by its fall over 12 inches.

Some will choose to keep their pre existing flat roof on their structure underneath the new pitched roof to save removal costs but others might not be able to consider that option as their building couldn t support the weight of two roofs. You will need to ensure that you are in standards with your local building codes and have the permits required. You can tear off the existing roof remove the trusses and strengthen the joists. The piece that allows us to join the two different slopes is the pitch transition trim.

They had the right idea but the peel and stick they used was rubberized asphalt which reacts with epdm. We re going to install it over top of the panels that have already been installed on the lower slope. It has a slope of 2 3. This allows water to flow off the upper panels out over the trim onto the lower panels and exits the roof at the eaves.

This has to happen whether you re just removing the pitched roof or adding another floor with a flat roof. The flat roof already has a slight pitch as it is required by law. A flat roof isn t actually flat. A roof that falls one inch over 12 inches is called a 1 and 12 and would be considered low slope.

Instead the roof must be done with a modified bituminous membrane e g. Most people view pitching a flat roof as a tedious job. Flat roof connected to pitch roof. Armourvalley or other materials like epdm pvc or tpo covering.

For slopes less than 9 5 we cannot install roof shingles. A low slope roof. They also didn t overlap the two membranes enough so it wouldn t have been long before a significant leak developed along the entire length of. The process for converting a flat roof into a pitched roof depends on your individual structure and your individual needs there is no one size fits all option.

It appears to be flat but it needs a slope to allow the water to drain from the roof.