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Reroof over existing shingles?

Posted by geeim (My Page) on
Fri, Sep 18, 09 at 14:50

I have standard 3-tab shingles on my modular home. I'd like to know if putting a layer of shingles over the existing roof shingles is acceptable and is the roof supports strong enough to handle a double layer of shingles?

Follow-Up Postings:

RE: Reroof over existing shingles?

I would advise against it because your new shingles comes with a putting them on top of the existing shingles would kill the warranty....& also would be alot of weight on the suport beams. My husband use to roof for a living & had his own company....he NEVER layed shingles atop old ones.
GL with the job : )

RE: Reroof over existing shingles?

Thanks for your input.

RE: Reroof over existing shingles?

I've done it both ways, but always had the owner sign a waiver stating that there was no warranty for the job if i shingled over the old shingles. I would rather remove the old shingles so the decking can be inspected for any damage. I think some locales require them to be removed.

RE: Reroof over existing shingles?

do not do it..have you ever lifted a package of shingles??? they are very heavy..and they will not seal properly over old..

i have seen people do this and it is a huge mistake..

RE: Reroof over existing shingles?

Thanks to everyone for your insight. We removed all the old shingles before replacing, which seemed to be the right thing to do.

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