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Tarpaper's purpose it two things

1. keep the roof dry until it is shingled
2. prevent the shingles from sticking to the sheathing

The 3rd reason is in case of a blow off, but I don't think that happens much anymore.
Thats the most intelligable reason I've heard of, what happens when the shingles stick? Maybe shingle damage? A lot of people tell me it prevents roof damage when the shingles fail at which point I laugh in their face. Worked for a guy who combined owned and controlled rentals were over 10k units. He have a screaming fit if someone tried to put down felt on a reroof, he'd grown tired of paying for osb mulch.
 
I did my share of residential shingle roofing when I was younger, saw a lot of different things but to this day I have no idea what tarpaper is for. Saw a lot of damage caused by it. *ducks head down*
What damage was ever caused by felt?
(psst: every asphalt shingle manufacturer requires the stuff under their product. Is that a clue?)
 
Tarpaper's purpose it two things

1. keep the roof dry until it is shingled
2. prevent the shingles from sticking to the sheathing

The 3rd reason is in case of a blow off, but I don't think that happens much anymore.
I patched a barn roof years ago that had some blow offs. The only place it had blow offs was where they had run out a roll of felt paper. The shingles there were brittle and dried out and the rest of the shingles were fairly pliable.
 
Do you think the paper was so dry that it sucked the moisture right out of the shingle? On a barn, I guess I could see that.
 
What damage was ever caused by felt?
(psst: every asphalt shingle manufacturer requires the stuff under their product. Is that a clue?)
Moisture can be trapped under felt, do you beleive everything manufacturers tells you? Oil manufacterers will tell you change your engine oil every 3000 miles, in truth you can go 5-6000 miles without worry. Dont have a clue why they would say such :whistling
 
Do you think the paper was so dry that it sucked the moisture right out of the shingle? On a barn, I guess I could see that.
Sorry, poor way to explain it.....Where the felt was missing the shingles were brittle. Where there was felt the shingles were still pliable. I'm not a roofer by any stretch of the imagination, but I don't cut any corners. The past couple of years I have been using Pro-tech on my roofs. A little more expensive, but better footing on it, it lays flatter and faster.
 
The question is where does one draw the line, every instance of roof is different and unique, so that line needs to be re-evaluated each and every time.
can you even be truly serious about your statement depending on your contract, which I would love to review sometime provided I am not on the throne and need it for other things, if you are telling your customer base that you are removing the existing and replacing with new that is EXACTLY what you do, as far as shiplapped/board decked roofs T&G
from the old school roofs, do you not want to see what the decking looks like underneath that paper? perhaps , just maybe there can be knotted pieces, fractures in the deck that you cannot see until inspections are done? how is it possible that you can say to your client base that you have done everything possible to ensuree that they will now have a new roof that will carry them into the future?
 
They need to get rid of or put into a differect section..."Recommended Reading"

This is how all these one post wonders come from.
It's causing these issues in forums all over that use this software. It is solely to try and drive new revenue and ad views.

It's annoying as all get out.

This one is even worse as it looks like someone popped in to just make a very belated scene.

I've never even heard those member names before. Many anyway.

How do random people come across these posts and threads? Is it posted in some search engine?

If so, I may stop posting. Not worth it if random people can take your posts out of all context.

Sent from my SM-N975U using Tapatalk
 
I'm not familiar with the software behind this forum. But in the past, a forum i was deeply involved with had the option to show all posts as read for new members. When I joined here I began perusing the boards for interesting reads. I almost posted an answer to a very old post. I then quickly went through the site and set all posts to "read". Now all I see are actual new posts, and any searching I am doing I know for a fact is history.
 
Old thread hoping for a response from those saying it's ok to leave old felt on. Had my roof replaced today and was fed a line about how leaving old felt under new synthetic let's the roof breath when I walked out and noticed what they were doing. I guess I'm not worried so much about two layers of underlayment as much as I am about having I&w applied on top of the old felt. Please explain why I should be concerned or rather not be in the opinion of those who think it's fine to leave old felt on. Just seems like the new iw barrier wouldn't be effective to me. And seeing the old iw barrier now has holes all in it from where nails were removed when the old shingles were removed.
 
Diyers and non-contractors are not permitted to post here.

You’re not goin to get any meaningful help here.

I suggest diychatroom.com.
 
felt out gases petroleum gases that add years to the shingle pliability......and help dry the sheathing where tiny leaks occur...
And gives shingles a little more resistance to hail damage.....

Tar paper won't leak when installed correctly and protected by the gravel and shingles above it......

Why do people skimp on their roofs to save a few hundred or thousands of dollars when 200-500K$ reside under them?????
 
I got up on a roof that I'm having replaced today (wind damage Friday). I noticed that the roofers are leaving on the old felt, substantially. They assure me that it's normal, and I'm hard pressed to insist otherwise. Are there any problems associated with leaving the old felt on, save for the fact that the proposal said 'removal to the decking'?

I snapped this photo while they were on their lunch break:


Image
I got up on a roof that I'm having replaced today (wind damage Friday). I noticed that the roofers are leaving on the old felt, substantially. They assure me that it's normal, and I'm hard pressed to insist otherwise. Are there any problems associated with leaving the old felt on, save for the fact that the proposal said 'removal to the decking'?

I snapped this photo while they were on their lunch break:


Image
I would tear off to deck...!

Best practices would tell you get it down to the deck and start fresh.

One thing that sticks out to me is For some unforeseen reason that roof failed, if you didn't tear them shingle off.

You have the roof techs there It's not going to cost you anything more to do it right.

This is the biggest reason roofers get a bad rap because they cut corners save a few bucks and just go right over the top.
 
Had my roof replaced today and was fed a line about how leaving old felt under new synthetic let's the roof breath when I walked out and noticed what they were doing.
Leaving something covered let's it breath.
That's a new one on me.
 
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