Welcome to our QSI website.

Our two display showrooms are filled with the latest in full scale models of windows, doors and sunrooms and are conveniently located at 175 Nebo Rd., Hamilton and 3245 Havester Rd., Burlington, Ontario.  
 
The secret to our success is really no secret at all – we take great pride in our quality, service, installations and our people.  “Everyone at QSI is committed to the best installation experience possible and this has been our guiding principle since 1976.” Rely on QSI for best performance window & door systems featuring our exclusive Smart Comfort Tri-Pane Window System.

Thank you for visiting, I hope you find what you are looking for during your visit.

Terry Bobiak

President and Owner
QSI Windows and Doors