1. Do you have clear complain record with Better Business Bureau?
2. Who will provide warranty service for my windows and doors?
3. Can I see an Energy Star Certification label with Your company name on it?
4. Are your windows tested and evaluated for Energy Performance?
5. Can I see and read full warranty informaion for your windows?
6. Who will perform installation of my windows and doors?
7. Do you have local showroom I can visit?
8. Can I find your company phone number in a local phone book?
9. Can you provide me with some references in my neighbourhood from 5 - 10 years ago?
10. Do you provide formal written estimate?
11. Does your company specialize in manufacturing and installation of windows & doors?

Like in any other industry there are a few companies who specialize in windows and doors only.

As a consumer, you have a choice of:

• full service window and door manufacturers
• individual handyman and renovators with a wide variety of talents
• general home improvement companies who provide you with a list of different services including replacement of windows and doors
• roofing or siding companies who can provide you windows replacement on a side
• porch enclosure, sunrooms, window and door dealers
• private window installers
• big box stores like Home Depor, Rona, Lowes or Home Hardware

It is up to you to decide where you feel more comfortable, because you will find a big variance in prices, product quality and service.