- Noticed the same thing with attic temps after a layover—especially in summer, it gets stuffy fast.
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Agree, but sometimes older houses just don’t have enough soffit space to add more vents. That’s been a headache for us.“If you do go with a layover, boosting ridge and soffit venting is pretty much essential in my book.”
- Curious if anyone’s tried those newer vented nail bases or synthetic underlayments to help with moisture? Wondering if that actually makes a difference or just marketing hype...
- Also, does anyone know if adding a second layer affects shingle warranties? Heard mixed things from different suppliers.
That’s a really good point about older homes and soffit space—ran into the same thing with my 1950s place. We tried to boost venting but just didn’t have the room, so attic temps still spike in July. I’ve seen those vented nail bases and synthetic underlayments popping up too. Honestly, I think they help a bit with moisture, but they’re not a magic fix if airflow is still limited. As for warranties, most shingle brands I looked at said layovers void or reduce coverage, but some local suppliers claim otherwise... seems like it depends who you ask. It’s frustrating how much gray area there is.
Honestly, I think they help a bit with moisture, but they’re not a magic fix if airflow is still limited.
That’s been my experience too—if you can’t get air moving, all the fancy underlayments in the world won’t keep the attic cool. Ever try those solar-powered vents? I’ve seen mixed results, especially in older houses where the soffit space is basically nonexistent. As for warranties, I’ve read the fine print on a few and it’s wild how much wiggle room there is. Makes you wonder if anyone actually gets a claim approved after a layover...
if you can’t get air moving, all the fancy underlayments in the world won’t keep the attic cool.
That’s spot on. I’ve always wondered if adding another layer on top just makes ventilation issues worse, especially when the old shingles are already trapping heat. Anyone else notice higher temps after a layover? Or is that just a myth?
I’ve definitely seen attic temps spike after a second layer goes on, especially in places with lots of sun. The old shingles act almost like insulation, but not in a good way—they just hold the heat longer. I’m curious if anyone’s tried improving ventilation after a layover and actually seen it help, or if the double layer just makes it too tough for airflow to keep up? Sometimes I wonder if skipping the tear-off ever really pays off long-term, especially when you factor in heat buildup.
