MON-X is a leading supplier of engineered building products in the construction industry supplying windows and doors in the greater Montreal and West Island markets.

Whether your needs are residential, industrial or institutional, MON-X will deliver cost effective solutions; satisfaction guaranteed.

Our strength is our experience and commitment to offering the highest quality doors and windows at the best value for your money.



Our commitment to quality extends from manufacture to customer service and support. At MON-X our professional and dynamic team offers personalized service in our well located, easy to find showroom or at your home. We will recommend the product that will best suit your design needs, meet your budget, will look great and offer a trouble free operation for years to come.

The installation of a window or doors is just as important as the product itself, because even the best products will perform poorly when installed incorrectly, which is why it is important to choose a company with a proven record of reliability, trust and customer satisfaction. MON-X holds its installers to the highest standards to ensure that your installation is done the right way the first time to meet and exceed your expectations.

Our doors and windows not only meet but exceed Canadian Standards so you can enjoy the benefits of improved heat and sound insulation. Our well insulated frames, energy efficient glazing, weather tight seals and multi chambered profiles ensure that heat loss is kept to a minimum. The tough exterior of our doors and windows will withstand the extremities of weather for a maintenance free finish that will retain good looks for years to come.