I've noticed our south-facing roof slope is definitely wearing faster than the shaded side. Thought it was just me being paranoid, but maybe there's something to the sun exposure theory after all... Guess I'll be climbing up there again this weekend to double-check.
"I've noticed our south-facing roof slope is definitely wearing faster than the shaded side."
You're not imagining things—sun exposure significantly accelerates roof deterioration. UV rays break down asphalt shingles, causing them to become brittle and lose granules faster. I've seen this firsthand on my own roof; the southern slope needed replacement years before the shaded side. Regular inspections help, but consider upgrading to shingles with higher UV resistance or reflective coatings next time you reroof. It'll save you climbing up there every weekend...
Yeah, I've noticed the same thing on my roof too. The south side shingles look like they've aged twice as fast as the north side, and it's not even close. UV rays definitely play a big role, but I also wonder if heat buildup might be contributing? Asphalt shingles absorb a ton of heat, especially darker colors, and that constant heating and cooling cycle probably doesn't help their lifespan either.
I recently read about lighter-colored shingles or reflective coatings being better at reducing heat absorption. Might be worth looking into next time around. Also, attic ventilation can make a difference—proper airflow helps keep the shingles cooler from underneath, potentially slowing down deterioration. I upgraded my attic vents last summer, and while it's too early to tell for sure, the attic definitely feels cooler now.
Anyway, roofs are expensive enough without having to replace half of it prematurely. Anything we can do to squeeze a few extra years out of them seems worth exploring...
