Standing seam… reversing direction
The roofers are here doing my shop… 12″ standing seam metal. The roof is a 12:12 gable (36′ long ridge) with a 6:12 shed dormer (24′ wide) centered in it (both sides the same). The gable does not start at the ridge, it starts about 5′ down, so that 12:12 metal runs across the top of it.
The crew started on at one end with the long 12:12 pans. When they got to the dormer they installed both the 6:12 pans, the transition flashing, and the short 12:12 pans above and went across the top of the dormer. When they got to the other side, they switched back to the long 12:12 pans.
Now, the dormer has side overhangs, so there is the need to run 2 pans back the wrong way. What they did is rip the rib off a pan and reverse direction so that they could continue putting in screws and snapping in the usual manner.
The metal is Nu-Ray 24-gauge. They tell me it cannot be unsnapped without damage once it goes together. I would have chosen a different metal if I had known this would not install well on this job. They tell me other brands can be unsnapped, so they can position the pan, mark it, unsnap, and screw when they have to change directions.
Anyway, I’m concerned that this long ripped edge, which is exposed, will start to rust because the steel is exposed, and I’ll end up with one big orange streak down that panel. I bought this stuff because I want it to last until after I’m dead.
I told them I’d rather have some exposed fasteners on this section (2 pans) than the big rip.
Does anyone know other techniques for handling this issue?
Replies
> I bought this stuff because I want it to last until after I'm dead.
Well I can see a simple solution. ;)
And these guys install this metal all the time.... or they are just roofers putting on some metal until the next shingle job???
If it wasn’t for the Bank Payments,
Interest, Taxes, Wages, and Fuel Costs,
I wouldn’t have to charge you!!
Will the zinc oxide crawl over the raw edge and protect it? I thought that was one of the advantages of galvanized.
Forrest
It isn't so much that the oxide "crawls". It's more that there's sacrificial zinc very close to the exposed iron (steel). The zinc goes first on the electromotive series.
-- J.S.
Oh.
Forrest