Why does picking between layering new shingles or ripping everything off have to be so confusing?

- Layering seems easy, but it’s a gamble - especially if you don’t know what’s under there.
- Extra weight adds up fast. I’ve seen rafters bow just from a second layer, and that’s before snow gets involved.
- Tear-off is messier, but you get a look at the decking and can fix rot or soft spots before they become a real headache.
- Some folks try to save a buck with layering, but if your framing’s even a little sketchy, it’s like putting a band-aid on a broken leg.
- Only exception I’ve seen work is on newer homes with beefy trusses and mild winters... but even then, you’re rolling the dice.

Some folks try to save a buck with layering, but if your framing’s even a little sketchy, it’s like putting a band-aid on a broken leg.

That’s exactly what I worry about. I get the appeal of saving money - believe me, I’d rather not shell out for a full tear-off if I don’t have to. But after poking around my attic last winter and seeing a couple of questionable spots on the decking, I’m leaning toward just biting the bullet. Layering sounds cheaper up front, but if you end up with hidden rot or sagging rafters, you’re just kicking the can down the road (and probably paying more later). I guess if your roof’s in perfect shape underneath, maybe it’s worth considering... but how often is that really the case?

Layering sounds cheaper up front, but if you end up with hidden rot or sagging rafters, you’re just kicking the can down the road (and probably paying more later).

I get where you’re coming from, but I’ve actually had decent luck with layering - at least in certain situations. My last house had a single layer of shingles in good shape underneath, and the decking was solid (checked from the attic and a few test holes). I went with a second layer to save some cash, and it held up fine for almost 15 years. Not saying it’s always the right call, but if you’re thorough about checking for soft spots or leaks, sometimes it’s a reasonable compromise. Just depends how much risk you’re willing to take on, I guess.

I’ve wrestled with this same decision more times than I care to admit. Honestly, I get the appeal of layering - cheaper, less mess, and you can usually knock it out faster. Like you said, if the old shingles are in decent shape and the decking’s solid (big “if” though), it can work out fine. My neighbor did a second layer about 12 years ago and his roof still looks alright, no leaks yet.

That said, I tried layering once on a rental property and ended up regretting it. Missed some soft spots in the wood, and sure enough, had to rip everything off a few years later anyway. Ended up costing more in the long run. Guess it really comes down to how much you trust what’s under there - and maybe how long you plan to stick around.

If you’re planning on selling soon or just need a few more years out of the roof, layering might make sense. But if you’re hoping for peace of mind for the next couple decades... sometimes biting the bullet and tearing it all off is worth it. Roofing decisions always seem simple until you’re actually up there sweating in August!

Funny how it always seems like a straightforward call until you’re staring at the roof, right? Did you check for any sagging or weird soft spots before you tried layering? I’ve seen more than one job where the decking looked fine from below but was hiding rot. Guess it’s one of those “pay now or pay later” deals. If you’re not 100% sure what’s under there, ripping it all up saves headaches, but yeah - cost and sweat factor are real. What kind of shingles are you working with? Some types just don’t layer well, especially in places with a lot of snow or heat.

I hear you on the “looks fine from below” trap - been there, got the soggy plywood to prove it. I always poke around with a screwdriver from the attic and then walk the roof, feeling for bounce. If it’s spongy, I rip it. If not, I’ll layer, but only with asphalt. Tried layering over old wood shakes once… never again. Those bumps telegraphed right through and looked awful.

Tried layering over old wood shakes once… never again. Those bumps telegraphed right through and looked awful.

I totally get that. When I bought my place, I thought layering would save me a ton, but the inspector pointed out the old shakes underneath. Ended up ripping everything off, which was a pain, but at least the new shingles sit flat now. If I’d just layered, I’d probably be staring at a lumpy mess every time I pulled in the driveway. For me, it came down to not wanting to redo it in five years.

- Been there, done that… my first house had those ancient shakes under two layers of shingles. Looked like the roof had chickenpox from the street.
- Decided to go full demo, which was a mess. Dust in every crevice, found a squirrel nest the size of a football. But at least I didn’t have to stare at weird bumps or worry about leaks every time it rained.
- My neighbor tried layering over shakes to save cash - big mistake. The new “flat” roof looked like a topographical map and he’s already talking about redoing it after just four years. Not exactly budget-friendly long term.
- If you’re even thinking about solar panels or a green roof (like I am… someday), you really want a clean, flat base. Can’t imagine trying to grow sedum on top of wavy old shakes - might end up with plants in my living room.
- On the flip side, ripping everything off is brutal on the wallet and your sanity. Dumpster rental alone cost me more than my last vacation. Still, I’d rather do it once and not have to worry about surprise leaks or critters moving in.
- Not saying layering never works, but if you’ve got old wood underneath, it’s asking for trouble. Plus, insurance adjusters seem to love finding reasons not to pay out when there’s three generations of roofing up there.

All that said… sometimes I envy folks with metal roofs who just hose them off and call it a day. But hey, at least my roof isn’t lumpy anymore.

Really resonates hearing about the “chickenpox” roof - mine was just as bumpy after two layers over old shakes. I hesitated for months about full tear-off vs. layering, mostly because of the cost and mess factor. Ended up biting the bullet and demoing everything down to the rafters. The amount of debris was wild. I pulled out a couple of bird nests and what looked like petrified insulation from the ‘70s. Still, once it was done, I slept a lot better not worrying about leaks every time it rained.

I get why folks try to save money by layering, but honestly, with shakes underneath, nothing ever sits flat. My neighbor’s roof looked like a patchwork quilt after his “budget” install, and he had to redo it after a few years too. The insurance angle is real - my adjuster made a big deal about multiple layers when I filed a claim for hail damage. Apparently, some policies have fine print about how many layers they’ll cover.

One thing I wish I’d considered more was future plans for solar. I’m in the Midwest where we get all four seasons, and having a flat, sturdy base is huge if you want to add panels or even just make maintenance easier down the road. I’ve seen some folks try to mount solar over uneven shingles and it’s a nightmare for both leaks and warranties.

The price tag for demo isn’t fun - dumpsters, labor, and disposal fees add up fast - but at least there’s peace of mind knowing you’re starting fresh. Curious if anyone here has actually gone the metal roof route? I keep hearing about the longevity and low maintenance, but I wonder how it holds up in places with heavy snow or hail. Does it really just need a hose-down now and then, or are there hidden headaches that don’t get mentioned upfront?

I get the appeal of a full tear-off, but honestly, layering worked out fine for me - at least in the short term. I had a single layer of old asphalt, not shakes, so it sat pretty flat and passed inspection. Saved thousands upfront, and insurance didn’t give me grief (yet). That said, I wouldn’t risk it with shakes or if I was thinking about solar. There’s definitely some gray area depending on what’s already up there and how long you need it to last.

- Had to make the same call a few years back. My place had one layer of old three-tabs, and the inspector said it was fine to go over them, so I did.
- Saved a chunk of cash, but I wonder if it’ll bite me later when it’s time for another replacement or if I ever sell.
- Tear-off seemed like overkill at the time, but I get why folks do it - especially with wood shakes or if you’re worried about hidden rot.
- One thing that surprised me: the new shingles didn’t lay quite as flat as I’d hoped in a couple spots. Not super noticeable, but if you’re picky, it might bug you.
- Insurance didn’t care, but my neighbor had issues when he tried to add solar panels after layering - installer made him rip everything off anyway.

Curious - anyone here in a colder climate? Wondering if ice damming gets worse with two layers or if it’s just a myth...

I’m up in Minnesota, so cold weather and ice dams are a yearly headache. When I did my roof, I debated the same thing - layer or tear-off. Ended up tearing off because the old shingles were curling and I was worried about trapping moisture. My neighbor went the two-layer route to save money, and honestly, his roof looks fine, but he did mention more ice damming near the eaves last winter. Hard to say if it’s just the extra layer or maybe his attic insulation isn’t great.

One thing I noticed: with two layers, the roof holds a bit more heat, which can melt snow unevenly and refreeze at the edges. Not a huge deal if you’ve got good ventilation, but if your attic’s a bit drafty or under-insulated, it can make things worse. I get why people want to save cash, though - roofing isn’t cheap. If I had to do it again, I’d probably still tear off, just for peace of mind and to check for any hidden rot. But I totally get the appeal of just layering and calling it a day.

- Been there - roof decisions always feel like a lose/lose.
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“with two layers, the roof holds a bit more heat, which can melt snow unevenly and refreeze at the edges.”

Tear-off is pricier up front, but I like being able to see what’s under there. Found rotten decking once that would’ve been missed if we just layered.

That’s exactly why I ended up doing a full tear-off last fall. I was nervous about the cost, but seeing the decking and fixing a couple soft spots gave me peace of mind. It’s a tough call, especially when budgets are tight, but sometimes knowing what you’re working with is worth it. Don’t beat yourself up - there’s no perfect answer, just what works best for your situation.

I hear you on the peace of mind - nothing like seeing what’s actually under those shingles. But man, the sticker shock is real. Ever notice how every time you open up a roof, there’s always “just one more” thing to fix? Makes budgeting feel like a guessing game...

That’s exactly what happened with mine - thought I was just dealing with old shingles, but then the decking had rot in two spots. Did you get any kind of detailed inspection before you started, or just roll the dice? I’m wondering if that actually helps avoid surprises or just adds to the bill...

Did you get any kind of detailed inspection before you started, or just roll the dice?

Honestly, I tried to be smart and paid for an inspection... still ended up with a “surprise” rotten patch right above the kitchen. Maybe it saved me from worse, but my wallet didn’t feel the love. Has anyone actually had an inspection catch *everything*? Or is it just a fancy way to brace yourself for bad news?

Inspections are useful, but they’re not magic. Even with a solid inspector, hidden rot or leaks can go unnoticed until you actually pull the shingles off. I’ve seen it plenty - sometimes there’s just no way to know what’s under there until demo starts. It’s frustrating, but I’d still take an inspection over going in blind every time.

That’s exactly what’s made me lean toward full tear-offs, even though it costs more up front. I get why people layer - cheaper, less mess, faster - but if you’re worried about hidden rot or leaks, how do you actually check for mold or soggy decking without pulling everything off? I’m also curious if anyone’s found a reliable way to spot water damage under old shingles before committing to demo. I’ve heard infrared cameras help, but not sure how well they work in practice.

I’ve actually tried using an infrared camera on a couple of inspections, and it’s hit or miss. If there’s active moisture, you might catch a cold spot, but if things have dried out or the attic’s well-ventilated, it doesn’t always show much. Have you noticed any soft spots when walking the roof? Sometimes you can feel a little give underfoot, but that’s not exactly scientific. I’m curious - has anyone here ever found hidden rot after layering, or is it mostly just a “what if” worry?