Metal Roof Pitch Change Detail

We re going to do a pitch transition or change.

Metal roof pitch change detail.

Transition flashing transition flashing is required when a roof makes a change from a steeper pitch to a lesser pitch. For low slope metal roofs under 12 that are nearly flat modified bitumen roofing thermoset and. Refer to the rain carrying table in this booklet for the maximum allowable panel length per slope that will provide adequate drainage. Pitch transitions are a common roof detail.

Panels ending in valleys must be cut diagonally and screwed down to the roof through the valley with trim screws. On the lower side the. This in turn results in a longer life span and a very low annual. In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch.

A roof pitch transition is a line in the roof plane that changes pitch. Refer to the rain carrying table in this booklet for the maximum allowable panel length per slope that will provide adequate drainage. For longer slopes and lower roof pitches contact fabral for other suitable profiles. Moreover low slope metal roofs are not prone to the degradation experienced by organic materials enabling these roofs to better resist the elements.

The roof plane goes from one pitch to a lower pitch. For longer slopes and lower roof pitches contact fabral for other suitable profiles. This is a fairly common roof detail. We see this quite frequently in log home roofs with porches for example.

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. The panels on the upper slope are attached in the same way as valleys. 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. Panels joined with an applied lap sealant can go as low as 12.

Metal roof slope is expressed by a ratio indicating the roof pitch which notes the vertical rise of the roof in inches for every 12 inches the roof runs horizontally in other words dividing the vertical rise and its horizontal span. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. See the illustration below. After that the miimum pitch for metal panels depending on the methods used to join the panels.