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What to Look for When Replacing Condominium and Commercial Windows

Updated: Mar 27, 2023

Exterior condominium windows.

Replacing condominium or commercial windows requires a slightly different approach from when replacing residential windows. Most mid to high-rise condominium windows use aluminum windows rather than vinyl windows to withstand higher winds. Check out a few other important factors to consider when you replace your condominium and commercial windows!

1. Commercially-rated

One of the most important factors is that windows must be commercially rated. In high-rise buildings, there are much greater air pressure and higher wind loads to withstand. Windows need to be structurally stronger as compared to low-rise residential windows. In most cases, we use aluminum windows (rather than vinyl windows which are commonly used for residential properties)

It needs to be certified by independent testing companies to meet certain standards. In addition, there are design requirements that need to be met. We highly recommend you check with your association or property managers about those specific requirements before reaching out to the installation contractor.

In some cases, the condominium has a budget to cover your replacements so do check with your property manager in that regard!

2. Contractor’s experience and reputation

After you check that your products are commercially rated for your building, you would like to make sure your contractors are experienced and licensed in installing windows and doors in high-rise buildings. It's highly recommended to work with an installer with at least 10 years of experience.

Check their websites to see if they have done any projects in the buildings that are similar to yours.

3. Product Quality

If you care to know a little bit more about windows and the science behind them, you need to consider product quality. What kind of warranty does it have? It should have a minimum of 10 years of warranty. Also, make sure your products are energy efficient. Though commercial windows are not energy star-rated, there are thermal breaks and frames which can tighten the air sealing and make your home thermally efficient.

Another important aspect is the glass. I recommend you get a high-performance glass package with Low E and Argon gas to increase energy efficiency and resilience.

Lastly, you can check whether it’s easy to operate or not.

Is it hard to open and shut? Is it sealed tightly? Aesthetically appealing?

All those questions are important to ask before you make your final decision. You could always ask for samples from the contractor

I hope you find this article helpful to find the right product!

OneSource specializes in condominium and commercial window replacements based on 30 years of experience. We proudly serve in Maryland, Washington DC, and Northern Virginia.



OneSource is a leader in supplying and installing high-quality replacement products for condominiums. As a company dedicated to providing high-quality products and installation experience, our highly-trained team will ensure a seamless installation process from start to finish.

As a company that specializes in condominiums, One Source understands the unique needs that each building needs. We work directly with condominium boards and homeowners to guarantee our products meet building specifications, and match aesthetic sightlines. We will help you determine the best products suited for your building requirements and budget.


All our products come with a high-performance glass package suited to high-rise buildings. Each product is engineered specifically to your building’s requirements and matches existing sightlines and configurations. Unlike vinyl windows that are commonly used in residential homes, our aluminum windows are equipped with thermal break technology which greatly reduces the surface conductivity, in turn making your unit warmer, safer, and quieter.


Our installation and replacement services include a full cleaning of the interior and exterior glass panels (on operable windows). Our technician will also completely clean your windows seal and confirm that the drainage system is free of dirt and debris.

Choose the right service for you

1. Windows

  • Horizontal Sliding Window Installation

  • Horizontal Sliding Window Replacement

  • Single Hung Window Installation

  • Single Hung Window Replacement

  • Double Hung Window Installation

  • Double Hung Window Replacement

  • Fixed Window Installation

  • Fixed Window Replacement

  • Casement Window Installation

  • Casement Window Replacement

  • Specialty Window Installation

  • Specialty Window Replacement

  • Awning Window Installation

  • Awning Window Replacement

2. Door

  • Sliding Glass Door Installation

  • Sliding Glass Door Replacement

  • Terrace Door Installation

  • Terrace Door Replacement

  • Folding Door Installation

  • Folding Door Replacement

3. Others

  • Balcony Enclosure Installation

  • Balcony Enclosure Replacement

  • Storefront Door Installation

  • Storefront Door Replacement

  • Storefront Glass Installation

  • Storefront Glass Replacement



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