🧩 What’s happening
Transition Flashing on a Split Pitch roof has the incorrect angle of bend.
We are looking at the issue with the angle of bend at the Transition Flashing as shown below in what Aussies call a 'split-pitch' roof, and it appears that there is indeed an
error, and in this example, potentially even worse than you might expect.
To test this we created a 10/12 roof, then added the 2/12 roof as a porch/veranda - two roof planes.
Change the line to Transition Line and generate the cutting list. You get an odd angle of bend. It is obviously not measuring the correct angle.
This is not good, as it may bring all the other bend angle dimensions in our cutting list into question.
However, it is evident that the angle displayed is the same as the end wall (which is correct).
You can see where the angle comes from…
I am assuming that you would expect the cut list to display 149.7°, not 129.8?
🔎 Why it happens
There are two lines at that point when you construct the roof as we did — what was an Endwall (Apron) and what was a Gutter line. The software still sees these as separate lines and there is no association between the two planes.
🛠️ Fix: Link the planes first, then set the Transition Line
When you use the Mod-Roof > Link planes option you create the required direct association between the two planes…
When you ‘link’ the planes, an association is created between the two planes and the two coincident lines merge.
There is just one line there now and it goes in as an endwall (apron) by default.
Now you double click the line and change it to a Transition Line
Generate the cutting list, and it shows the correct angle of bend.
