I’ve wondered if the extra weight from a second layer ever causes issues down the line, especially with older framing. My neighbor went the “add a layer” route and ended up with sagging spots a few years later—contractor said it was borderline for code but insurance didn’t want to touch it. Has anyone had luck getting a straight answer from their insurer before starting work?
The weight question comes up a lot, especially in homes built before the ‘70s. I’ve seen older rafters and trusses that were never designed for modern roofing loads, let alone a double layer of asphalt shingles. In my area (Midwest, lots of snow load in winter), I’ve inspected a couple houses where the second layer pushed things right to the edge—rafters start bowing, decking gets soft, and you see those telltale dips between trusses. Sometimes it takes years to show up, sometimes it’s almost immediate if the framing was already stressed.
I’ve actually had clients call their insurance companies before doing a re-roof, thinking they’d get a clear answer about coverage. Most of the time, the insurer punts—says they’ll “review” if there’s ever a claim but won’t give a straight yes or no about covering damage from extra weight. One adjuster told me off the record that if it’s not code-compliant or there’s evidence of overloading, they’ll fight any payout for structural repairs. That lines up with what you saw with your neighbor.
Honestly, I get why people want to just add a layer—cheaper, less mess, faster. But unless the framing is beefy and in great shape, it feels like rolling the dice. I’ve even seen some local codes now requiring full tear-offs on anything pre-1980 just because of all these issues cropping up.
If you’re dealing with an older house or questionable framing, I’d lean toward full removal every time. It’s more upfront cost but way less risk for sagging or voided insurance down the road. And if you’re ever selling? Home inspectors (like me) will flag double layers as a potential problem for buyers and lenders.
Out of curiosity—has anyone actually gotten something in writing from their insurer about this? I’ve never seen it happen, but maybe someone’s had better luck...
- Looked into this last year—my house is 1965, rafters aren’t exactly beefy.
- Called my insurance and got the same “we’ll see if you file a claim” runaround.
- Ended up doing a full tear-off. Cost more, but I sleep better not worrying about sagging or a denied claim.
- Bonus: found some old leaks hiding under the first layer... glad I didn’t just cover it up.
- If you’re planning to stay a while, I’d say just bite the bullet and do it right.
That’s pretty much the route I took, too. My place is early ‘70s, and the original decking was already a bit sketchy. I debated just adding another layer, but with the extra weight and our snow loads here, it felt risky—especially since my rafters aren’t exactly overbuilt either. Full tear-off let me check for rot and insulation gaps, plus I swapped in a cool roof membrane for better energy efficiency. It cost more upfront, but I figure it’ll pay off long-term with fewer headaches... and lower cooling bills in summer. Sometimes shortcuts just aren’t worth it.
I think you made the right call, even if it stings a bit upfront. I was tempted to just layer new shingles over my old ones (mine’s a ‘68 ranch), but when I started poking around, I found some soft spots and a weird patch of mold. Full tear-off was a pain—messy and not cheap—but at least now I know what’s under there. Plus, being able to add better insulation was a bonus. It’s one of those things where you only want to do it once, you know?
