Why is there frost or ice on my aluminum commercial entrance?
Frost or ice forming on the inside of your aluminum commercial entrance or storefront window system is a common issue in cold climates. This happens when extremely cold outdoor temperatures come into contact with warm, humid indoor air. Because most standard aluminum storefronts and aluminum doors are non–thermally broken, they lack the insulation barrier needed to prevent outside cold from transferring through the metal. As a result, the interior surface of the aluminum frame can become cold enough for condensation, and eventually frost or ice, to develop.
This issue is often most noticeable around storefront windows, commercial glass doors, and aluminum framing systems, where air infiltration, worn weatherstripping, or elevated indoor humidity levels contribute to the problem.
How to Fix or Prevent Frost on Your Aluminum Storefront
There are several effective ways to reduce or eliminate frost buildup:
- Reduce Indoor Humidity
Excess moisture in the air is the leading cause of condensation. Lowering your building’s humidity can significantly reduce frost formation on your commercial entrance or storefront glass, such as by using dehumidifiers, improving HVAC balance, or ensuring exhaust fans are functioning properly. - Increase Airflow Across the Storefront
Improving airflow helps keep the interior surface warmer. Opening vents, removing obstructions, or directing fans toward the entrance can reduce cold spots and minimize frost development. - Replace or Upgrade Weatherstripping
Damaged or worn door weather stripping allows cold air to enter the building, increasing the likelihood of condensation. Replacing weatherstripping around your storefront door, commercial entrance system, or glass door frame helps reduce drafts, minimize moisture buildup, and improve overall comfort.
If you’re experiencing ongoing issues with frost, drafts, or failing storefront components, explore our Commercial Aluminum Projects to learn how Reflections Glass & Mirror can provide high-quality solutions for your building. We’re here to help you enhance performance, durability, and reliability in every commercial glass installation.