Our existing windows were over 25 years old and didn't provide for a quick exit for our new tenant in case of fire. For security we wanted a safe window system that would also provide quiet for ourselves and our new tenant. The thermal qualities were also a factor. The installation went smoothly. We'll see how well they perform over time. We have a 40 year all inclusive warranty to call upon as a back up. I don't think we'll need it.
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