Good suggestions overall, but have you noticed if powered attic fans ever cause issues with moisture buildup? I've heard mixed things... wondering if that's just certain climates or installations. Curious what your experience has been.
Yeah, powered attic fans can be hit or miss. I've seen them help in hot, dry climates, but in humid areas they sometimes pull moist air into the attic, causing condensation issues. Proper ventilation balance is key—otherwise you're just trading one problem for another...
"Proper ventilation balance is key—otherwise you're just trading one problem for another..."
Couldn't agree more. Took me a while (and some trial and error) to realize that insulation alone wasn't enough—getting airflow right made all the difference. You're definitely on the right track with that thinking.
Took me a while (and some trial and error) to realize that insulation alone wasn't enough—getting airflow right made all the difference. You're definitely on the right track with that thinking.
Totally get what you're saying about ventilation balance. I've seen plenty of roofs where folks went insulation-crazy and ended up trapping moisture... not pretty. Curious though, did you find ridge vents or turbine vents more effective for airflow on your bitumen roof?
Ventilation's definitely the unsung hero of roofing—everyone loves insulation, but airflow gets no respect, haha. I've seen a few roofs where folks went nuts with insulation and ended up with moldy plywood... not exactly a fun surprise when you peel back the layers.
Personally, I've found ridge vents to be pretty reliable overall, especially if you've got a decent pitch. Turbine vents can work great too, but they're kinda hit-or-miss depending on wind conditions. Had one job where the homeowner insisted on turbines because his neighbor swore by them. Problem was, the house was tucked behind a hill—barely any breeze. Those turbines just sat there looking pretty and doing nothing useful. Ended up swapping them out for ridge vents after a year or so.
Speaking of airflow though, anyone tried combining soffit vents with ridge vents on bitumen roofs? Seems like it'd make sense to get that bottom-to-top airflow going, but haven't personally tested it yet...
