Any body have any good information on roll roofing. For example rolled roofing exposed fastener is good for what roof pitch?
I believe roll roofing can go down to 1/2 to 12 if lapped halfway and concealed fastener.
Job I had today had 1/2 to 12" roof slope with exposed fastener.
James I wouldn’t worry much about the nails, the ridges in the material will be cooked by the sun and fail probably before there is a fastener problem.
James,
standard roll roofing can go down to 1:12 pitch if hot mopped, to go lower you could use the 2 ply (wide selvage method) if hot mopped in place and blind fastened, but that will have a relatively short lifespan. the best soultion on flat roofs is realy a multiple ply hot mopped (Built up roof) method.
The picture you posted is obviously of a home owner repair/recover and as other have stated will last a very short time.
Regards
Gerry
Gerry,
I would love to agree with you but unfortunately people usually get what they pay for. There are plenty of “roofers” and " handymen" who have no idea what they are doing but who convince the homeowner that they do. The picture could certainly be the work of a “craftsman”.
[quote=lagudo]
Gerry,
I would love to agree with you but unfortunately people usually get what they pay for. There are plenty of “roofers” and " handymen" who have no idea what they are doing but who convince the homeowner that they do. **The picture could certainly be the work of a “craftsman”.****/**quote]
Agreed.
I recently got my roof replaced by a “craftsman” with over 20 years of experience.
I had to watch him and his crew like a hawk.
Don’t you just like hearing that saying, that they have been doing this work for 20 years, and this is the way it is done. Ha. Ha. is all I sayit to that. My response to this would be "I am sorry that you have been doing it wrong for that long and that it is unfortunate that you have never realize that you have be taught wrong all these years. "
Marcel 
Every rolled roofing application I’ve inspected on homes are BAD. Just did one last week on a flat roof, (homeowner fix) the decking felt like a spong when I walked on it. Called it out for a roof certification, and got a call from the buyer this week thanking me because the roofer said it would be about $3,000 to fix and asked who inspected it because I did a great service for her. (Like hearing that) Rolled roofing is good for sheds and nothing more. Just my opinion.
Peter,
I must agree!
When it comes to roll roofing, I think everyone knows how to apply it and only read the directions from the Manufacturer when something is wrong. ha.
Roll roofing has a very short life span, approx. 5-8 years that I have noticed in Maine. Double coverage method will last a little longer. Exposed nails is not that dramatic in roll roofing. Due the nail being galvanized and penetrating asphalt layers that thick, they are not apt to leak readily. Nail heads are commonly sealed with asphaltic cement when used to the elements or exposure.
Marcel
Most rolled roofs I’ve seen are on small additions which have a shed style roof. In these case’s when replacement is needed a steel roof is a fairly cost efficient way to go.
Hardly ever see 90 pound rolled roofing (like in the picture) anymore around here or salvage. Never supposed to top nail it either. We use a lot of cold process or torch grade modified bitumen on residential houses and it seems to work well. And again, never top nail it.
James this article might help
mario