Just wanted to share a quick update—about five years ago, we swapped out our old vinyl windows for Marvin’s Ultrex fiberglass ones. Honestly, I was skeptical at first (you know, marketing hype and all), but man, they've held up incredibly well. Zero warping, fading, or cracking, even with some pretty harsh winters and blazing summers. Anyone else seeing similar results with fiberglass compared to vinyl? Curious if it's just luck or if fiberglass really is the way to go long-term.
We switched to fiberglass about six years ago, and honestly, it's been a noticeable improvement over our old vinyl ones. I was mainly looking for better energy efficiency (you know, lower heating bills in winter), but durability has been a nice bonus. No fading or warping here either, even with direct sun exposure on the south side. Seems like fiberglass really does hold up better long-term... at least that's been my experience.
I've had fiberglass windows in for about four years now, and I agree—they've been solid performers. Vinyl wasn't terrible for me, but it did warp slightly on the sunny side. Fiberglass just seems more stable overall... plus, fewer drafts mean fewer sweaters indoors, haha.