<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><br>Hi Steve, shingles are normally good for twenty years or better so I'd check the warranty first.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">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. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">No tar paper if going over the existing, but do check all your flashing and vents.</div><div id="AppleMailSignature"><br>Thanks;<div>Dom</div><div>Sent from my iPhone</div></div><div><br>On Jan 21, 2017, at 9:01 PM, Steve Bigelow via Woodworkers <<a href="mailto:woodworkers@lists.sawdusters.org">woodworkers@lists.sawdusters.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div>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.</div><div><br></div><div>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.</div><div><br></div><div>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. </div><div><br></div><div>The other question is if roofing over, do I put down new tar paper? Existing is leaking.</div><div><br></div><div>I'll be doing some research on my own, but the collective wisdom here is something I can trust.</div><div><br></div><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Regards,<br>-Steve<br><a href="http://woodworking.bigelowsite.com" target="_blank">http://woodworking.bigelowsite.com</a><br></div><a href="http://pen-blanks.us" target="_blank">http://pen-blanks.us</a><br></div></div></div>
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