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-   -   Can I cover over my existing roof? (http://www.diychatroom.com/f9/can-i-cover-over-my-existing-roof-180095/)

dereklawler 05-21-2013 12:04 AM

Can I cover over my existing roof?
 
Iím planning to replace my whole roof but someone suggested me to cover the existing roof with the new one Iím not sure that itís good for my home or not I f you guys have some knowledge about this specific issue kindly share it with me.

747 05-21-2013 12:29 AM

Yes you can layer over an existing roof. Check code. Most is usually 2 layers. However most guys don't like to do this for multiple reason. One they can't get a good look at the sheathing. Two they don't like the esthetics, A couple examples.

Finally if laying over existing shingles it will be more money to re-roof someday down the road.

OldNBroken 05-21-2013 12:41 AM

...now cue the "you should never do recover" purists. :whistling2: :whistling2: :whistling2:

747 'bout summed it up for you. It is preferable to tear it off but you can recover it to whatever your local codes allow.

jagans 05-21-2013 09:33 AM

Don't do it. There are many more reasons than those already mentioned, not to mention that a quality oriented steep roofer would not do it even if you asked him to.

Its got nothing to do with being a "Purist" Its got to do with doing things right.

GBrackins 05-21-2013 04:00 PM

remember, just because you can do something doesn't mean you should ...... big difference

excellent advise given by others, they know of what they speak :thumbup:

joecaption 05-21-2013 05:48 PM

I'll just refuse to do a roof over.
They look like poop, more often then not they never seal right.
I've gone to houses that had 4 layers of shingles on them.
They about had a heart attack when I told them what it was going to cost just to remove them.

jsbuilders 05-21-2013 06:30 PM

The big thing is it doesn't let the roof dry correctly, speeding up the brake down of the shingles. It can cut your roof life down 30%

I've done it 2 times ever out of thousands of roofs, and only under special circumstances. I give no warranty with it, and never recommend it.

Davejss 05-21-2013 07:12 PM

One layer shingle-overs are very commen in my area. If the existing shingles are in good shape, no leaks, no holes, not too curled, no lifting, etc., then a shinlge-over rather than a strip off is an econimical alternative to stripping and re- roofing. However, most of us prefer to strip for all of the reasons mentioned. The new roof lays down flat quicker, you can check for roof deck integrity, and you can better handle flashing around obstacles. It costs a bit more for labor and disposal, but you get a much better job.
Having said that, you can certainly do a good job of shingling over as long as attention is paid to the areas mentioned.

jagans 05-21-2013 08:09 PM

Quote:

Originally Posted by Davejss (Post 1184382)
One layer shingle-overs are very commen in my area. If the existing shingles are in good shape, no leaks, no holes, not too curled, no lifting, etc., then a shinlge-over rather than a strip off is an econimical alternative to stripping and re- roofing. However, most of us prefer to strip for all of the reasons mentioned. The new roof lays down flat quicker, you can check for roof deck integrity, and you can better handle flashing around obstacles. It costs a bit more for labor and disposal, but you get a much better job.
Having said that, you can certainly do a good job of shingling over as long as attention is paid to the areas mentioned.

Hi Dave,

Good Post. Im sitting here laughing after reading: "If the existing shingles are in good shape, no leaks, no holes, not too curled, no lifting, etc."

Why the heck are they replacing it in the first place???

Davejss 05-22-2013 04:10 AM

Quote:

Originally Posted by jagans (Post 1184456)
Hi Dave,

Good Post. Im sitting here laughing after reading: "If the existing shingles are in good shape, no leaks, no holes, not too curled, no lifting, etc."

Why the heck are they replacing it in the first place???

Because it may need replacing. The granular material may have worn off, the shingles could be faded and unsightly, the shingles may be years past their design life span, there may be an addition which needs to match, etc.

Oso954 05-22-2013 04:15 PM

It still comes down to pay now, or pay later.

jagans 05-22-2013 09:09 PM

Quote:

Originally Posted by Davejss (Post 1184702)
Because it may need replacing. The granular material may have worn off, the shingles could be faded and unsightly, the shingles may be years past their design life span, there may be an addition which needs to match, etc.

Granules worn off does not qualify as "Good Shape" to me, but whatever. We Beat this dead horse enough. :thumbsup:

GBrackins 05-22-2013 09:11 PM

http://www.arboristsite.com/images/s.../deadhorse.gif

just for you J

dereklawler 05-29-2013 12:12 AM

thanks to all of you
 
thanks to all of you guys for your valuable opinions it really a good Experience to be a part of your community. :-)


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