Hi there,

Hoping for some advice and input from people who have used or know people who have used Fibertec and Inline for their fiberglass windows. I’m currently looking to change my old windows and I’ve done some research on vinyl and fiberglass, mostly. I’m likely staying away from wood or aluminum windows. I live in Toronto, Ontario so we have great variance in temperature and climate seasonally. Leaning a bit toward fiberglass, but haven’t made my decision yet. 
I’ve gotten quotes from both parties, Inline coming in a bit lower than Fibertec. I understand the “benefits” of Fiberglass vs Vinyl, such as less expansion and contraction during temperature changes, although I hear vinyl is better as an insulator. I’ve also been told that Fiberglass can last as long as 35-40+ years but I find it a bit hard to believe the windows will perform quite so well for that duration of time, that I question after a good 20 years whether you wouldn’t arguably see that the windows at that age, would be worth replacing. The Inline sales rep was telling me it’s not really worth investing in triple pane as the climate here doesn’t quite warrant the need and is more recommended for those who live in Northern parts of the region, nor would it pay off in energy savings cost till decades later. Fibertec sales rep was advocating the opposite, saying it’s worth the extra cost, especially if you plan to live in your home for more than 5+ years. Cost difference between double to triple is approx 15-18% higher. 

My question is, what is the general thoughts on what either of the sales reps are trying to inform me or sell me on and how much truth can I put in what either are suggesting? 
Does anyone have thoughts on their experience or known experiences with either company? Perhaps recently, say 5 years or so, the quality of their windows, performance, look, their service and honesty living up to their warranties, should i.e. the glass fail or frame issues develop. Inline states their warranty is 20 years on frame and glass, not including service installation. Not sure of Fibertec, need to consult with the sales rep again.
Any suggestions to go with other companies,? I quoted Pella months ago, they came in higher than Fibertec and I also quoted Marvin who was a bit more than Inline but a bit less than Fibertec. 

One other note is Fibertec makes their own glass, while Inline purchases their glass. Not sure which of the two is better, Inline used to purchase from Cardinal but unsure if they continue to do so and whether Cardinal is considered the best in this category at this point in time. 

Appreciate any advice that can be shared. 

Thank you,
Peter