(503) 314-9728 dorian@thermoloc.co

New Construction

Therm-O-Loc provides top quality windows and doors to some of the highest rated builders in the northwest. Ordering your windows and doors through a Milgard Certified dealer means that you will have access to our unbeatable prices and service for all of your window and door needs. We use only the best local manufacturers; Milgard and Cascade Windows. This ensures that your new construction project will have the most efficient, beautiful, and long lasting products which are paired with some of the best warranties in the industry. We work directly with builders for a hassle-free, straight forward process when it comes to ordering windows and doors.

Contact us for a free estimate on any new construction project.


We are quite pleased with the Milgard windows that Dorian and his crew installed as replacements to our old wooden cased windows. We had 20 windows to replace and Dorian and his crew got the job done in one day!! Therm-O-loc was the lowest bid we received and we are very pleased with the end results. We would be pleased to recommend Dorian's company to anyone who would like to know how happy we are.

Bob Palmer

I have done business with Dorian at Therm-O-Loc for 15 years. He really delivers, consistent, on-time and an all round good guy. I was so happy to have him tear out a terrible window and install one that works for me. He never disappoints.

Mary Franklin

We are very happy with our 14 new Milgard replacement windows. The price, quality of installation, product, cleanliness, consideration of our animals, general demeanor, and thoughtfulness of you and your crew were excellent. We would be happy to recommend you anytime, and hope you can do some other projects for us in the future.

John Klosterman

Therm-O-Loc Showroom