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Weighing the pros and cons: full roof removal vs. just adding a new layer

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tgreen37
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Yeah, I hear you—overlay isn’t always the villain it’s made out to be. I’ve seen plenty of roofs last a good decade or more with a second layer, especially if the first one wasn’t a total disaster underneath. Midwest winters are no joke either, so if yours held up, that says something.

That said, I’ve also seen some horror shows after a big storm rolls through. Sometimes you peel back those layers and it’s like opening a mystery box—surprise, rotten decking! But if the roofer actually checks for soft spots and there’s no major curling or leaks, it can be a decent budget move. Just gotta know you’re rolling the dice a bit.

I always tell folks: if you’re planning to stay in the house long-term, full tear-off is usually worth it. But if you’re just trying to get a few more years before selling or you’re tight on cash, overlay can make sense. Just don’t skip the inspection part... that’s where things go sideways fast.


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Sometimes you peel back those layers and it’s like opening a mystery box—surprise, rotten decking!

That line made me laugh because, honestly, it’s way too real. I’ve been on more than one roof where what looked like a simple overlay job turned into a full-on “what’s that smell?” situation. Midwest storms can be brutal, but even down here in tornado alley, the aftermath can get wild. I’ve seen overlays hold up fine for years, then suddenly a hailstorm hits and exposes all the hidden sins underneath. It’s like the roof was just waiting for the right moment to spill its secrets.

I get the budget angle, though. Not everyone has the cash for a tear-off, and sometimes you just need to buy time. But here’s a question: how many folks actually get a legit deck inspection before overlaying? I feel like most of the time it’s a quick walk-around, maybe a poke here and there, and then new shingles go up. If you’re not checking from inside the attic—especially after a big storm—how do you really know what’s going on under there?

Another thing I’ve noticed is that overlays seem to age faster if the first layer had any issues with ventilation or moisture. You ever see those ripples and bubbles that just keep getting worse every season? Drives me nuts. And when you finally do tear everything off, sometimes the decking looks like it spent a decade in a swamp.

I’m with you on the long-term plan: if you’re staying put, tear-off is usually worth the pain and extra cost. But if you’re just trying to pass inspection and move on, overlay can work... as long as you’re not rolling the dice on a hidden disaster. Anyone else had luck with overlays in humid climates? I’m curious if it’s just a Midwest thing or if it’s the same story everywhere.


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simbaw42
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Had to laugh at the “what’s that smell?” bit—been there, done that, and it’s never good news. I tried an overlay once on my old ranch house (asphalt shingles, humid southern summer), thinking I’d save a few bucks. Looked fine for about two years, then the attic started smelling like wet socks and the ceiling got those weird brown spots. Turns out, the original layer had some hidden rot and the overlay just trapped more moisture. If I ever do it again, I’m definitely crawling around in the attic with a flashlight first.

Curious—has anyone tried using those moisture meters before overlaying? Wondering if they actually help catch problems you can’t see from above.


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simba_harris
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I’ve actually used a moisture meter before doing a roof overlay, and honestly, it’s not a magic bullet but it does help. Mine picked up some damp spots in the sheathing that I never would’ve noticed just poking around. Still, you gotta be thorough—crawl spaces, weird corners, all of it. I’d say it’s worth the extra step, especially if you’re in a humid area. Trapped moisture is just asking for headaches down the line... learned that the hard way with a patch of mold behind my bathroom vent.


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photography_becky
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Trapped moisture is just asking for headaches down the line... learned that the hard way with a patch of mold behind my bathroom vent.

I hear you on the moisture meter, but honestly, I’ve seen too many overlays where folks skip the tear-off and regret it later. Even with meters, you can miss stuff—especially in older homes. Full removal’s a pain, but you really know what you’re working with underneath. I’ve had to redo overlays that looked fine at first, then three years later, surprise... rotted decking. Not saying overlays are always bad, but you’re rolling the dice.


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