Layering’s tempting, but hidden rot is no joke... seen too many surprises under old roofs.
That’s exactly what’s got me second-guessing the whole “just add another layer” thing. My house is only about 15 years old, but when I bought it last year, the inspector flagged a couple of soft spots near the eaves. Turns out, previous owners had layered new shingles over the old ones—looked fine from the street, but underneath? Total mess. Had to rip off both layers and replace some of the decking. Not cheap.
I get why people do it though—saves money up front and you don’t have to deal with all that debris. But after seeing how fast rot can spread under there, I’m honestly not convinced it’s worth the risk. Especially if you’re somewhere humid or get a lot of storms. Maybe it’s different in dry climates, but here in the southeast, moisture just finds its way in.
About those “cool shingles”—I keep hearing they help with energy bills, but does anyone actually notice a difference? I’m skeptical. My neighbor put them on last summer and swears his attic stays cooler, but I’m not sure if that’s just new roof hype or if there’s real science behind it.
Also, what’s everyone doing about valleys? I see a lot of metal flashing around here, but some folks just weave the shingles. Is one really better than the other long-term? I’d rather spend a bit more now than deal with leaks every spring...
I’ve seen the same thing with layered shingles—looks fine until you actually get under there. I manage a few properties in a pretty humid area, and every time we’ve had to deal with a roof that was double-layered, there’s been some kind of hidden damage. The upfront savings just don’t seem worth the risk, especially when you factor in the cost of replacing decking later on.
About the “cool shingles,” I’ve heard mixed things. One tenant swears their AC runs less since we put them on, but another didn’t notice any change. I guess it depends on attic insulation and ventilation too? There’s supposed to be science behind the reflective granules, but I’m not sure it’s a game-changer unless your attic is already roasting.
For valleys, I always lean toward metal flashing. Weaving shingles looks cleaner, but every time we’ve had a leak, it’s been at a woven valley, not a metal one. Maybe it’s overkill, but I’d rather not gamble with water finding its way in, especially with how much rain we get. Anyone actually had a woven valley last more than 10 years without issues?
Weaving shingles looks cleaner, but every time we’ve had a leak, it’s been at a woven valley, not a metal one.
You’re spot on about woven valleys being leak-prone, especially in heavy rain areas. I’ve seen plenty that looked perfect for years, then suddenly you get that one big storm and water finds its way in. Metal flashing might seem like overkill to some folks, but after dealing with insurance claims from water damage, I’d rather play it safe too. As for cool shingles, I agree—unless your attic’s a sauna, the difference is pretty hit or miss. Ventilation and insulation make way more impact in my experience.
I hear you on the woven valleys. They look tidy, but I’ve had to patch more than one after a big downpour. Metal’s not the prettiest, but it does its job. Honestly, I’d rather deal with the look than another ceiling stain.
Metal’s not the prettiest, but it does its job. Honestly, I’d rather deal with the look than another ceiling stain.
- Gotta admit, metal valleys are like the dad jeans of roofing—practical, not winning any beauty contests.
- But have you tried closed-cut valleys? They’re a bit more forgiving than woven and don’t scream “industrial chic.”
- I’ve seen some metal valleys rust out faster than expected, especially near the coast. Salt air’s a menace.
- Personally, I’ll take a few extra patches over that tin-can rattle every time it rains... but maybe that’s just me.