Frequently Asked Questions
Frequently Asked Questions
We would like to welcome you to our facts and questions page, here are our most asked questions and the answers.
Whether you are curious about our line of products’ energy efficiency, customization, durability or warranty options, we hope these responses will help guide your decision-making process.
What type windows and doors do you offer in uPVC?
We offer the full range of window and door configurations, such as casement, slider, hung, picture windows and sliding doors as well as the more modern European styles like tilt-turn windows. These styles can be combined in a variety of ways, including multiple units within one continuous frame for stunning views.
Are your products climate friendly?
Not only do Glasshaus windows and doors contribute to sustainability through superior energy efficiency and longevity, the lifecycle of our REHAU uPVC is actually more climate friendly than that of wood and alternative materials. Its base resource – chlorine (or salt) –is abundant, its manufacturing process efficient, and it can be re-melted and recycled. uPVC has an 80 percent lower carbon footprint over its lifespan than aluminum, for example.
Do your windows and doors have a better thermal performance than older vinyl windows?
With glazing capacities of up to 2” and built-in insulation chambers, Glasshaus REHAU windows and doors deliver up to 35% better energy performance than typical residential windows. With U-values down to 0.13, they far surpass the average 0.37 U-value of older windows.
How long do your windows and doors prevent drafts and moisture?
Glasshaus’s windows and doors retain their beauty and luster for 30 years or more, our product optimize daylight while keeping the inside environment comfortable and the outside environment … outside!
What warranty do we offer on our window and door product?

S. K. Lee
2024-09-11
As recommended by our contractor Tamarack Windows and Doors (excellent installation) we chose sturdy black exterior / white interior “Aspekt 1800” windows.

Simon Khoury
2021-07-05
We strongly recommend Euro Vinyl Windows and Doors to anyone looking for quality at a very fair price. My wife and I are very impressed with the excellent.

John Shales
2021-09-28
Euro is great. I love the windows and doors. The installation was exceptional. Couldn’t be happier.
What our customers say

Tim B.
February 18, 2025
This is a great company who went above & beyond with their support. My order was affected by the industry’s supply-chain issues (due to COVID) but the team at Glasshaus made a big effort to complete the job and ensure my project was a success. Excellent customer service that you can’t find at many other places. My door and window look great and are super solid as well. I would definitely work with them again and recommend to others.

Mukin F.
March 3, 2025
Wow is the first thing that came to mind after these windows were installed! They look and perform amazingly. Jim gave us many options to choose. We had extra coatings added because our house faces east/west and the sun can be intense. We were very surprised at how well these coatings work keeping the heat of the sun out. The triple seals make a big difference in the noise from outside.

Simon K.
May 8, 2025
We strongly recommend Glasshaus Vinyl Windows and Doors to anyone looking for quality at a very fair price. My wife and I are very impressed with the excellent workmanship, modern design & competitive price of the patio door and windows, and with the professional installation by Marek and his team. The entire process was a pleasure. Thank you Nessim for your excellent service, and we have no doubt that we made the right decision in choosing Glasshaus Windows over competitors.