On Wednesday, October 11, 2017 at 9:14:08 AM UTC-4, Jeremiah Roper wrote:
replying to John, Jeremiah Roper wrote:
Actually roof warranty is void with most manufacturers if you lift the shingle
and screw underneath.

The man said nails.



Anything sticking up under a shingle like a screw head,

The man said nails.


will work it's way through the shingle quickly causing a much bigger problem.
Screws or nails work out over time and it only takes one summer to poke up
through the roof.

The roof deck is full of nails holding the deck on. I guess any nails
holding hangers would be subject to different loads and might pull out
easier. And if screws or nails wind up pulling out, what does that say
about using them on top of the shingles too?


I've personally seen it. Now I install straps on top.

--

Not on my roof, you wouldn't. I wouldn't have brackets over or under
the shingles. If normal brackets that go into the fascia were used in
most places on the job, I don't see why they couldn't be used everywhere.
The mistake here was not planning out the whole thing ahead of time.
That's what I did when I got a new roof. I checked all the soffits,
gutters, replaced some rotting wood that I found, so that when the
roofers came, it was all good to go. And if I saw any gutter hangers
nailed to the roof, I would have said, woooah, what's up with this?