24 under your shingle coursing its also a good idea to nail of the top of the plies with buttons then overlap it with the shingle underlayment whether it be felt or i w.
Pitched roof to flat roof transition.
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.
With the proper roof slope and drainage installation precipitation is not a problem for buildings with flat roofs.
Our 4 12 pitched roof transitions to a flat roof on three sides with two valleys feeding into the flat roof on the corners pls see pic we had the flat roof covered with tpo which runs at least a foot up the sloped roof on the three sides.
However flat roofs are not really flat.
Getting water off a flat roof sounds like a tricky scenario.
We are in the process of having a standing seam metal roof installed.
Once these decisions are made your flat roof will be removed or not and the carpentry work will commence.
A roof pitch transition is a line in the roof plane that changes pitch.
This is a fairly common roof detail.
We re going to install it over top of the panels that have already been installed on the lower slope.
See the illustration below.
Metal base flashing is really only good if its put on by a good metal man and has locked and solderd joints fully sweated and laced with properly heated irons.
Finally finishing touches such as gutters and exterior siding will be added.
You can tear off the existing roof remove the trusses and strengthen the joists.
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.
The piece that allows us to join the two different slopes is the pitch transition trim.
Run the flat roofing up under the transition a min.
A very important detail is where the flat roof is connecting the pitch roof.
After the new space is framed or trussed the pitched roof can be installed and any necessary hvac or interior renovations can be concluded.
This allows water to flow off the upper panels out over the trim onto the lower panels and exits the roof at the eaves.
They would be more accurately called low slope roofs.
This has to happen whether you re just removing the pitched roof or adding another floor with a flat roof.