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

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kskater36
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(@kskater36)
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- You’re spot on about the hidden issues with living roofs. That moisture can sneak in and cause way more headaches than folks expect.
- I’ve seen a few projects where people tried to save a buck by just adding layers, and it ended up costing them double later when rot set in. Not a fun call to get from a client, trust me.
- Full tear-off does seem like a pain (and yeah, the upfront cost stings), but you get peace of mind knowing you’re not trapping any old problems under there.
- Plus, you can check out the decking for soft spots or mold—stuff that’s impossible to see otherwise.
- If you’re in a wetter climate, or your roof’s already got some age on it, skipping the tear-off is kind of rolling the dice.
- That said, I’ve seen folks with newer roofs and just one layer get away with overlaying for a while, especially if they’re planning to sell soon—but it’s definitely not something I’d recommend for living roofs or anything with leaks already showing up.

Honestly, I think you’re making the right call being cautious. It’s always tempting to cut corners when budgets are tight, but roofs aren’t really forgiving if something goes wrong under there... especially with all the extra weight and moisture from a green/living roof setup.

If it helps at all, every time we’ve done a full removal and fixed up the base properly, homeowners have told me they sleep better at night—no joke. Sometimes paying more upfront really does save you down the road.


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Posts: 6
(@adam_robinson)
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Not saying overlays are always the answer, but I’ve seen some success stories—especially with newer roofs that only have a single layer and no major issues. If the decking’s solid, and you’re not in a super wet spot, it can buy you a few more years and keep things affordable. Of course, it’s not for living roofs or anything where leaks are already showing up, but for basic asphalt jobs on tight budgets, sometimes it makes sense to at least consider it. Just gotta be real about the risks.


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emilyt53
Posts: 9
(@emilyt53)
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Yeah, I’ve seen overlays work out alright too, especially when the old shingles are still laying flat and the plywood’s not spongy. My uncle did one on his place—saved a chunk of cash and it held up fine for years. Not perfect, but sometimes you gotta work with what you’ve got.


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Posts: 15
(@karenwoof264)
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- Agree with you on overlays working if the old shingles are flat and decking’s solid.
-

“saved a chunk of cash and it held up fine for years”
— that’s usually the main reason folks go this route.
- Just keep in mind: overlays can hide problems. If there’s any hint of water damage or soft spots, you’re just covering up trouble.
- Insurance sometimes gets picky about paying out on roofs with multiple layers, especially after storm damage.
- In my experience, full tear-off is better for long-term peace of mind, but I get why people overlay when budgets are tight.
- If you’re in a hail-prone area, overlays don’t hold up as well—seen too many get trashed after one bad storm.


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Posts: 16
(@kimparker150)
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Had a neighbor go the overlay route a few years back—looked fine at first, but when they finally had to do a full tear-off, there was a ton of hidden rot underneath. That’s the part that always worries me. I get that overlays are cheaper up front, but you’re basically gambling that there’s no moisture trapped under those old shingles. Plus, if you’re thinking about energy efficiency or even solar down the line, starting fresh with a tear-off gives you way more options for insulation and ventilation. Just my two cents... sometimes saving now means paying double later.


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