If you have plenty of DIY experience, you could take on this project by yourself as it is not an especially difficult task. The project requirements may be more than you are expecting. But if you doubt your capacity even a little, it would be best to call in the professionals. With experience and attention to detail, a professional installation company will ensure that you get the most bang for your buck in terms of energy-saving features and home security. Choosing a Toronto doors and windows company is the right way to go when choosing replacements.