Curious if anyone else has managed to pull off a green roof on an older home without crazy structural work...
I tried to get a lightweight system going on my 1920s bungalow, but even the “ultra-light” options still needed more support than my rafters could handle. Ended up just beefing up insulation and sticking with a single-ply membrane. Not as cool as a meadow, but at least I’m not worried about the ceiling caving in during a wet spring. The peel-and-stick membranes have been surprisingly solid, especially compared to the torch-down stuff—never liked the idea of open flame on old wood.
Yeah, torch-down on an old house makes me nervous too. I’ve seen a couple of attic fires start from careless torch work—sometimes it’s just a tiny ember that finds its way into a gap and hours later, you’ve got a disaster. Peel-and-stick is a lot less stressful, especially if you’re dealing with old, dry rafters or questionable wiring up there. The only thing I miss is the durability of a good torch-down, but I’ll take peace of mind over a few extra years any day.
I get where you’re coming from—torch-down on an old place can be nerve-wracking. I’ve been on a few jobs where the rafters were so dry, I was half-expecting to hear crackling behind the walls. One time, we had a guy working a torch and even with fire watches, something smoldered in a wall cavity... didn’t show up until hours later. Not fun.
Peel-and-stick’s definitely safer for those situations, especially if you’re dealing with questionable wiring or insulation that’s seen better days. The trade-off is real though—the torch-down stuff just holds up better long-term, especially if you get a lot of sun or temperature swings. I’ve seen peel-and-stick start curling at the seams after about 10 years in some spots.
If you’re worried about fire but still want durability, have you looked at cold-applied systems? They’re not perfect, but they split the difference—no open flame, and they last longer than most peel-and-stick options. Just depends what you’re comfortable with and what your budget looks like.
The trade-off is real though—the torch-down stuff just holds up better long-term, especially if you get a lot of sun or temperature swings.
Had a similar scare last year—one of the older buildings I manage had a torch-down put on in the 90s, and when we did a patch, the contractor was super cautious because of all the old cellulose insulation. The risk is real; I get nervous any time an open flame’s involved in these places. Cold-applied is decent, but I’ve noticed it can get messy if temps drop too low. Anyone else find peel-and-stick just doesn’t hold up in direct sun? I keep seeing those seams curl after a few years, especially on south-facing roofs.
I get the appeal of torch-down for longevity, but honestly, the fire risk makes me uneasy—especially in older homes with who-knows-what behind the walls. I went with a self-adhered mod bit last year, and while it’s not perfect (yeah, those seams can be a pain), I’d rather deal with some patching than worry about burning my place down. Maybe it’s just my luck, but I’ve seen torch-down jobs fail too—usually from poor prep or shortcuts. Nothing’s bulletproof, I guess.