We needed three windows replaced because their seals had broken down, causing both loss of insulation, and ugly stains between the panes that we couldn't clean. We spoke with four different contractors about this.
One, whom we have used for other work, quoted us a price that was more than 50% higher than we eventually paid, said the windows would have to come from Germany, and that it could take months.
A second said we'd have to tear out the entire window structure, that merely replacing the sealed window units would not work. They wanted substantially more than we were willing to pay to do so.
A third didn't bother to reply after their initial inquiry, but then did so very late in the process with a quote we felt was unrealistically low, probably in a low-ball bid.
Fortress replied promptly, gave us the information we wanted online, came promptly to inspect the windows and give us a written, reasonable quote, sourced the windows locally, and had the job specked & finished within 3 weeks. Steve & Richard were pleasant, even funny, but worked quickly with a minimum of fuss, both during their initial – painstaking – inspection, and during their quick and clean installation. They also replaced a broken window lock for only the cost of the part required – no labour charge.
We are delighted with the results, and would not hesitate to make use of them again when we need windows!