[Woodworkers] Composite roof replacement

[Dominic Palazzola via Woodworkers]

Hi Steve, shingles are normally good for twenty years or better so I'd check the warranty first.

Here in Michigan we can put on up to three layers before we need to tear off due to weight, however tearing off gives you a chance to inspect but then you have to dispose of the old materials. 

No tar paper if going over the existing, but do check all your flashing and vents.

Thanks;
Dom
Sent from my iPhone

> On Jan 21, 2017, at 9:01 PM, Steve Bigelow via Woodworkers <woodworkers at lists.sawdusters.org> wrote:
> 
> Slightly off topic, but I just went up into the attic in my house and realized that the roof is desperately in need of replacement. Honestly, if I waited any longer, I'd have to start replacing the sheathing.
> 
> The question is, should I rip off the old and replace, or just roof over existing? Existing is about 15 years old and completely shot. It's the only layer on the roof.
> 
> Keep in mind it's the middle of winter, so not exactly the most pleasant time to replace the roofing. If I need a total tear-off, I'll let a pro do it, and probably replace a few sheets of sheathing. Roofing over the existing, I can handle that over a few weekends.  
> 
> The other question is if roofing over, do I put down new tar paper? Existing is leaking.
> 
> I'll be doing some research on my own, but the collective wisdom here is something I can trust.
> 
> 
> Regards,
> -Steve
> http://woodworking.bigelowsite.com
> http://pen-blanks.us
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