Anything wrong here? This is a modified bitumen flat roof; the canale was attached here.
Why do you ask?
It is quite ripped out.
No one can properly answer that with 1 small close-up pic of some (possibly) torn up roof deck.
The decking is often removed so the flange will be flush with or below the sheathing. If the canale is removed, then that is what you have…a hole.
Or it could have been ripped out for a repair. Who knows?
Yes, repairs were being done. The canale was secured to the modified bitumen roof with fasteners. Because of the gap between the roof decking and the parapet, the fasteners were not screwed into any decking. At least, there was a large gap between the edge of the structural decking and the parapet.
Also, the canale was placed on top of a layer of the roll roofing and secured with fasteners. I don’t think this was done according to code. I am not a professional, I just don’t know how to describe how this was done. As mentioned, it has been repaired since these photos were taken.
If a hole is often cut out as you say, is it then common practice to attach the flange of the canale so that it rests on top of the roofing layers but because of the hole there is no actual decking material beneath the canale flange?
This is the only other picture I have. These are old pics, and again, these were taken mid-repair.
Thank you for your input.
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I would not say it is common practice, but it is done at times to assist with drainage. The more slope the better.
The flange should never be on top of the roofing material. It should be handled like most roof flashing.
These are common roof problems. Most roofs I inspect have this issue. As seen below, layers of incompatible sealant added over time. These repairs are seldom effective and most often damage is found below at decking, rafters and interior finishes.
And the underside
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Thank you. I appreciate your feedback. It didn’t seem right, the way the canales were installed, but I don’t know the lingo to describe what I am seeing.
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Well, I see you are concerned about the missing roof decking. I don’t think that few inches around the canale is big deal if it helps slope the flange downward. Even a small hump can back-up water and debris.
Second, if the canale flange was above the top layer of roofing material, that would be wrong.
It should be layered appropriately. Basically above the underlayment and below the top surface material.