Yeah, I learned this the hard way a few years back. We went with layering new shingles over the old ones because the decking looked solid from below, and it was cheaper. Fast forward three winters (I’m in Michigan), and surprise—rot around a vent pipe that nobody saw coming. Insurance didn’t want to touch it since there wasn’t “active” storm damage, just old moisture trapped under the layers. If I could do it over, I’d probably bite the bullet and do a full tear-off just for peace of mind. Layering saved money upfront but ended up costing more in repairs later… live and learn, right?
Layering saved money upfront but ended up costing more in repairs later… live and learn, right?
Man, I feel this. I went with layering too because my wallet was already crying from the HVAC bill. But now I’m paranoid every time it rains hard. Has anyone actually had layering work out long-term, or is it just a ticking time bomb in cold states?
Has anyone actually had layering work out long-term, or is it just a ticking time bomb in cold states?
Honestly, in colder climates, layering almost always comes back to bite you. The main issue is ice dams—once you’ve got two layers, it’s way easier for water to sneak under the top shingles and get trapped. I’ve seen a few homes where layering held up okay for maybe 10 years, but usually there’s hidden rot or mold when you finally strip it all off. Did you notice any extra sagging or soft spots after heavy rain? That’s usually the first sign things are going sideways.
- Seen plenty of layered roofs last 15+ years here in the Midwest, even with rough winters.
- Ice dams are a risk, but honestly, poor ventilation and insulation cause more headaches than layering itself.
- Tear-offs are cleaner, sure, but not everyone’s budget can swing it.
- If the first layer’s solid—no curling, rot, or soft decking—I’ve seen layering work out fine.
- Wouldn’t recommend it on anything already sagging or with bad leaks, though. That’s just asking for trouble.
I’ve layered shingles once, and honestly, it was mostly because of budget. Midwest winters are brutal, but the old layer was still solid—no curling or soft spots—so I figured it was worth a shot. Five years later, no leaks, but I do wonder about long-term weight on the rafters. Anyone ever had issues with sagging after layering? Or is that more of a problem with older homes?
