Air Sealing Your Comfort is Our Main Priority

We deliver world-class customer service with options that are designed to fit your budget, and our friendly staff treats your home with the respect it deserves, no matter the size or scope of your project.

St. Louis Air Sealing

Air leaks can be costly. Not only do they allow conditioned air to seep out of your home, reducing your comfort, but they also suck money out of your wallet in the form of lost energy. If all air leaks were sealed and no air leaked out of the home, there would be no room for air to leak in, and your home would be far more energy-efficient. This is the goal of air sealing a home - sealing air leaks reduces the amount of conditioned air lost, thus reducing the amount of unconditioned air that enters the home.

At Building Envelope Experts, we offer comprehensive St. Louis air sealing services that target your home’s most vulnerable areas and cut off airflow to keep your home more comfortable and efficient. 

Attic Sealing

If we had to guess, we could confidently say your attic is the single largest source of unwanted heat exchange and energy loss in your home. During summertime, blistering heat and sweltering sunlight cause the air in your attic to catapult into triple digits (especially if your attic ventilation is inadequate). This air can seep down through cracks or gaps in your ceiling, causing the cool temperatures your air conditioner created to slowly and steadily creep back upward.

Building Envelope Experts seals your attic by targeting gaps in your ceiling, wherever they hide. This means properly insulating and sealing holes drilled for ceiling fans, light fixtures, smoke detectors, bathroom fans, and more. By sealing these gaps and installing highly-efficient attic insulation, we can cut off sources of air leaks and keep your home feeling better throughout the year.

  • “The product they deliver is top-notch and the installation is precise. Wonderful people to work with. We’ve had them at our home twice already and plan to use them exclusively for all of our remaining window replacements.”

    Matthew F.
  • “Building Envelope Experts did an outstanding job with insulation in our attic and window replacement for our entire house. The crew was courteous and knowledgeable. They kept a clean work area and got the job done on time.”

    Steve J.
  • “Replaced 2 windows with one awning window. Looks amazing inside and out. They were in and out including cleanup in a flash. Highly recommend.”

    Daniel Z.
  • “Excellent quality. Expert installers. Competitive prices.”

    Mark H.
  • “Not only have our heating needs gone down significantly, but our house is so much quieter now. My kids woke up during every thunderstorm for years and now sleep through them all!”

    Meg C.

Basement Sealing

Basements are also a key source of unwanted heat loss, particularly around support joists in your ceiling. When air leaks out of your house, it is frequently replaced by cold air from spaces down below, resulting in drafty feelings during the winter months. Air sealing your basement prevents this unwanted chilly and humid air from entering your home and compromising your comfort. If you’ve noticed that your home feels drafty and cold, particularly during the heating season, schedule an inspection and learn how our basement sealing services can help you!

Stop the air leaks today! Contact Building Envelope Experts and schedule your consultation.

There is No Place Like Home

Our highly-trained energy experts use a holistic approach that analyzes all of your home’s comfort systems, including your windows, doors, and attic or basement seals, to target and eliminate inefficiencies.

  • BPI Gold contractor

What Makes Us Different?

The Building Envelope Process

Our multi-step system has proven time and time again to work efficiently for maintaining round the clock comfort. We’ll provide you with a customized plan is designed to achieve your home comfort year-round.

  • Review Our Comfort Goals
    We provide you and your family with a detailed analysis of our products and services. Next, our dedicated technicians work with you 1-on-1 to determine your goals and how best to achieve them.
  • Evaluate Areas of Heat Loss
    Once we have determined your goals, we run an analysis of where the major areas of heat loss are in your home in order to optimize our strategies. We want to ensure we leave your home as comfortable as possible.
  • Identify Energy-Saving Solutions
    Next, once we have determined any areas of improvement, our team provides you with our energy-saving solutions. We will look at all systems holistically and provide you with guidance on how best to enhance your home environment.
  • Provide Good, Better & Best Options
    After reviewing your options and deciding on a course of action, our experienced, dedicated, and efficient technicians will get to work on making your home as comfortable as possible.


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Your Home Comfort is Our Main Focus
  • - Energy Efficient
  • - UV Protection
  • - Added Security
  • - Curb Appeal