Specializing in Window & Door Replacement and Customization

RMS is your leading window and door replacement service provider in Oshawa, Ontario, serving the GTA. We specialize in:

Window Replacement

We can change the look of your home to a more modern look, transforming your indoor and outdoor area with one simple update.

Door Replacement

Sliding, storm, French, exterior, Interior – you name it! We can fulfill your door replacement needs no matter what your style is, we have you covered.

Big & Small

We handle projects of all sizes. Residential and light commercial installation services are our specialty.

Complete Service

From design to installation of your custom window and door needs, we manage the project from start to finish to ensure complete satisfaction.


Seeking that custom replacement for your remodel project? We can work directly with your contractor to ensure the best quality and design.

No matter what your window or door need, we’d love the opportunity to assist you. Contact us for a free quote!

Free Estimates

Contact us today to set up your free no obligation quote!