Hello all, My first time addressing this community.
I’ve done a number of building tasks but this weekend will be my first roofing expedition. Not only is this my first time but I have the honor of putting new asphalt shingles on a double wide. Renown in buildings of high quality.
I plan to put a second layer of shingles on the original. So my question has to do with what is necessary. Do I need to place any flashing around where existing flashing has been placed for pipes and such that go though the roof?
I assume that I don’t need to flash at drip lines because there is flashing already in place.
Well I look forward to your input.
Your Jamaican friend HandyMon
Replies
Greetings Handymon,
Welcome to Break Time.
To partially answer your question: A second layer of three tab shingles will add approximately 3000 lbs to the roof of a 24X40 double wide. So I'd be callin' the manufacturer mon, askin' 'im if dhat house is strong enough.
Edit: I'd also be checkin' under the house, to see if the center joint is being properly supported.
Best wishes, Peter
Edited 8/30/2007 3:02 pm ET by Hudson Valley Carpenter
Thanks Mon I'll give dem a callin, Heaven knows I don't need my shaunty fallin aroun me.Byron
Peter,What center joint are you talking about?Joe Carola
Joe,
I'm not real clear on the terminology used to describe modulars but isn't a double wide one of those homes that are built in two sections, each 12' wide?
Thats' a good question. I don't know the answer to that either. I was in a double wide about 20 years ago and believe me, from inside you couldn't tell it was a double wide. It looked like a nice little ranch house.Joe Carola
Thats' a good question. I don't know the answer to that either. I was in a double wide about 20 years ago and believe me, from inside you couldn't tell it was a double wide. It looked like a nice little ranch house.
I got curious about the different types of homes and the terms used to describe them, so I googled Double Wide Home. It turns out that double wides are called manufactured homes. They don't fall into the modular category.
I also was invited to visit a double wide once, more than ten years ago. I recall that, other than the ceilings being lower than eight feet, the place seemed like any small stick built design, very pleasant. As you say, they give the impression of a little ranch house.
some are 8' or as much as 16' a section wide...Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->
WOW!!! What a Ride!Forget the primal scream, just ROAR!!!
Can I persuade you to NOT add new shingles over old ones? It's gonna add a lot of extra weight and you may void the shingle warranty. (Most warranties are only valid if the shingles are laid on a clean roof deck.)
(Most warranties are only valid if the shingles are laid on a clean roof deck.)
Where'd you get that BS? Certainteed has a hail resistant model that the warranty will be void on a roof over, but that's the only back up I could find to your statement.
I agree with your sentiment, but your facts aren't factual.
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http://grantlogan.net/
edited for spelling
"he ot the placed closed down whyyy thhhattt nnooo gooodddd" - sancho
Edited 8/30/2007 9:28 pm ET by seeyou
This came up just before I did a carport re-roof early this year so we checked the wrapping on the shingles. It was there. I don't remember the brand, but they came from Home Depot.
Dave----------you are repeating an old wives tale-----------
I have a bundle of Certainteed XT30 shingles in my garage right now with directions on the wrapper on how to do a layover installation.
additionally---when we first started using ELK dimensionals-------ELK advertised them as the IDEAL shingle to use in a layover situation.
now---if you bought shingles from Home Depot---- they were probably O.C.----and of course ####,LOL :)---------wether used in a layover or not.
Stephen
Hey Haz, ya can't say #### any more..and ya also can't say ####, but nipple is ok.Spheramid Enterprises Architectural Woodworks
"If you want something you've never had, do something you've never done"
There is something to that old wives tale though.I did a layover back in - oh, about '78 with Bird shingles. Not all of them sealed down. None blew off, but sometimes they would wave at you in a high wind.The company denied the claim on the basis that it was a nail-over. I just sealed them my self ( self-sealing DIY guy that I am) and laughed it off while letting the company know that I'd never be buying any more Bird shingles
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
somewhat seperate issues Piffin-------------
I am trying to think if I personally know ANYONE who has successfully collected on a shingle warranty----not coming up with anybody, LOL
also trying to think of who swollowed up Bird----which is just before my time--Certainteed?
Cardboard box type allotment not far from me-----osb walls sheating,20 year O.C. 3 tabs----most roofed one winter about 10-12 years ago-----EVERY jan,feb,march shingles blow off right and left through that allotment----NEVER sealed down---- I can see 'em flapping in the wind from the highway.---Not my problem,LOL
Stephen
"I am trying to think if I personally know ANYONE who has successfully collected on a shingle warranty-"
Good question. I've had to replace quite a few roofs that only lasted 10 years or so and never even thought of trying to claim on the warranty. I've always thought of the warranty numbers as giving a reasonable length of time you might expect the roof to last - as in a 50 year shingle is better than a 20 year. As a guarantee that any roof would last that long around here seems in my experience an act of senseless optimism.
Depends on what you define as success. I got, I think, about $200 out of Certainteed. And that was for a failure at 9 years on a 25 year shingle.
So convenient a thing it is to be a reasonable Creature, since it enables one to find or make a Reason for everything one has a mind to do. --Benjamin Franklin
I have known GAF to replace a couple of roofs.
One was for failure to seal down and that was one where I don't think they were at fault. It was in winter, in West Texas where dust blew in on the seal strip before it got warm.
The other was some of their very first Timberlines. The two laminations were not well fused together at the factory. They covered labour on that one also.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Hudson and you have convinced me. I shall repent and start from scratch. Double wide construction is just too flim-flam to bet on. So there it is now the project is more work than before.I thought you guys were supposed to make things easier!Thanks
Jamaican friend HandyMon
Welcome also. Well, since you just had a near hit on a CAT 5, maybe the 2nd layer will be OK for the life of the shingles in the tropical sun.
However, if you do the overlay and do get another Cat 4 or 5, you will lose more shingles than laying a new single layer.
??On the other hand (OTOH), maybe the added weight in high wind will help the roof stay on?? Would be interesting to see a study on that, I don't know the answer, probably dependent on the roof slope also.
Don't do it.
I am one of few who recognizes that there are many instances where a roof-over can be just as good as a total re-roof with tear-off.
But definitely not in your case.
Two reasons -
One is that a double wide has barely standards for real homes. You can be assured that you will be challenging this structure with adding the weight of an added layer of shingles.
Second, Every double wide I have ever seen has a pitch that is too low for shingles in the first place. The only way I would shingle such a low pitch is to use ice and water shield over the whole thing applied directly to the sheathing, then lay the shingles at 4" exposure instead of five inch. You just cannot do this in a layover situation. You will create puddle pockets that hold water on the shingles where it can find a way to leak in.
Also, if this needs re-roofing now, there is almost assuredly some water damaged sheathing that needs to be repaired/replaced.
Welcome to the
Taunton University of Knowledge FHB Campus at Breaktime.
where ...
Excellence is its own reward!
I think maybe he's talking about a modular home. I bought a farm once that had one of those on it. It was basically two 12'x40' units, each with half a gabled roof hooked together on site. I think the roof was a 4/12.http://grantlogan.net/
"he ot the placed closed down whyyy thhhattt nnooo gooodddd" - sancho
Maybe, but I have never heard a double wide called a modular nor a modular called a double wide before. The differences in construction are so wildly different that I don't know how a person could make that mistake.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
You need to "think like a raindrop". If you shingle over and don't do anything about flashing, rainwater will get under the new layer of shingles at places that are currently flashed.