Customer Service

Customer service is one of GL Advanced Windows key competencies. We focus our attention on understanding customer needs and accommodate them in the best possible way. We are able to achieve that by providing a high degree of customization.
There is a growing trend towards having large windows in the house. They allow a lot of sunlight inside the building which is very valuable in the northern regions. Large window also serve an aesthetic purpose, visually increasing the size of the room, making it more spacious and comfortable. But larger windows require stronger reinforcement to ensure that the window can resist harsh weather conditions, while preserving its energy efficiency qualities. We insert an additional steel reinforcement to guarantee that.
We offer thinner, more elegant profiles for the windows that can be installed in smaller rooms to increase the glass surface of a window while maintaining its technical qualities.


Sometimes it is practical to choose different types of glazing options for windows that face different cardinal direction to use glazing capabilities to its fullest potential. Implementing different glazing options would lead to a more balanced and stable temperature climate inside the house. This, in turn, would allow the homeowner to decrease their air conditioning and heating costs.


Different glazing options specifications allow us to provide a better soundproof protect against urban noise. Soundproofing upgrade is highly customizable since it is determined by the type of noise, its source and volume. At the same time soundproof upgrade is affordable and justifies its cost by making a house more peaceful and comfortable.


To achieve a high level of customer satisfaction, we provide a variety of color options for our windows and doors. We have more than 40 different colors and over 20 woodgrain options to ensure that our customers could find a color that would fit in perfectly with the design of their house. We also offer a unique acryl glass coverage option for the window frames which has a very long durability and makes the house look new for a long time.


We provide 25 years limited warranty for of our products. Some of them enjoy a lifetime warranty.


GL Advanced Windows considers that customer service is one of its key competencies. We focus our attention on understanding customer needs and accommodate them in the best possible way. We are able to achieve that by providing a high degree of customization



  • A variety of discounts for the customers to take advantage of in 2020
  • We will surprise you with our prices!


  • Modern technologies and designs allow us to offer products of the highest quality
  • Focus on providing only top-of-the-line premium windows for a promotional price


  • Our standard windows have superior sound insulation
  • Soundproof upgrades focus on significantly minimizing different type of noise


  • Our goal is to find a perfect solution for customer-specific problems
  • High degree of customization allows us to make your house efficient and unique


  • Over 40 color and 20 woodgrain options for the window frames
  • Unique acryl glass frame coverage that lasts for 100 years


  • Provide a variety information about passive houses
  • Our windows are suitable for passive house projects

Interesting Facts


Our premium windows have a steel reinforcement that is 1.6-2.8 times stronger than other tilt and turn windows and over 5 times when compared to regular windows in the market.


Our tilt and turn windows exceed the ENERGY STAR certification standard by 50-70% in terms of insulation which provides a superior energy efficiency.


With soundproof windows upgrade it is possible to reach a significant difference, decreasing noise level by 6-12 times, and up to 30 times in some cases.

Interesting Facts

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Since our windows are manufactured in Europe the lead time is ranges from 6 to 8 weeks. Order slightly earlier and you will be satisfied by savings, quality and durability.
Our top priority is the quality of our products so we use thicker glass and steel reinforced frame for long term durability which makes our windows 20-30% heaver then regular windows.

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