I get why folks try to save by just adding a layer, but how do you really know what’s lurking under there? I mean, I’ve heard some people get away with it for years, but what if there’s hidden rot or old leaks you can’t spot until it’s too late? Did your contractor say anything about how common that “mushy plywood” is? I wonder if certain climates or older homes are just more prone to that kind of hidden mess.
I mean, I’ve heard some people get away with it for years, but what if there’s hidden rot or old leaks you can’t spot until it’s too late?
You’re right to be cautious about what’s under the old shingles. In my experience, “mushy plywood” isn’t rare, especially on homes built before the 80s or in spots where gutters have overflowed. That said, not every roof needs a full tear-off. If the decking feels solid everywhere and there’s no sign of leaks inside, a second layer can work—just know you’re rolling the dice a bit. In wetter climates or with low-slope roofs, I’d lean toward removal every time. It really comes down to risk tolerance and budget.
- Full tear-off means you can check for rot, add better insulation, and even upgrade to a cool roof or solar-ready setup.
- Second layer’s cheaper up front, but you’re stuck with the old stuff underneath—if there’s mold or bad wood, you won’t know until it’s a problem.
- I’ve seen folks regret skipping removal when they later wanted to add solar panels or green roofing.
- Anyone here tried adding a living roof after just layering shingles? Wondering if weight was an issue...
Full tear-off just makes more sense if you’re thinking long-term, especially with anything heavy like a living roof. I’ve seen roofs where a second layer seemed fine at first, but then the weight became a real issue—especially after a few wet seasons. Plus, you never really know what’s going on underneath until you pull it all up. It’s more upfront work and cost, but you get peace of mind and way more flexibility down the road. Definitely worth considering if you’re planning upgrades later.
With living roofs, you really can’t mess around with hidden issues. I’ve seen folks try to save money by just layering, but moisture gets trapped, rot sets in, and then you’re ripping out way more down the line. Not worth the gamble, honestly.