Air sealing is one of the most effective, non-­invasive ways for Greater Philadelphia area homeowners to improve home performance. Many people don’t realize that their homes are loaded with different cracks and gaps that can allow outside air to enter and conditioned air to escape, both of which can result in indoor air quality and energy efficiency issues. Combined with the proper insulation, air sealing can be the solution that puts a stop to this problem altogether.

What is Air Sealing?

Caulking Window to Seal Air

Take a moment to look around your home, and chances are you’ll discover areas in which air is able to freely move in and out of the home. Cracks and gaps can happen after years of settling, but they also exist as a product of when the home was first built—around pipes, for example. As you might expect, heat can escape through these gaps during the winter, with cool air escaping during the summer. This can run your utility bills through the roof, not to mention put a damper on home comfort.

Air sealing is the process of closing up these gaps and keeping air inside the home instead of allowing it to escape. Caulking and weatherstripping around windows and doors are examples of air sealing techniques. You can also choose to install replacement windows if you have cracked window panes or if your current windows are beginning to show signs of excessive wear. Basements and crawl spaces should also be looked at, where wire and pipe protrusions are common.

Air Sealing & Insulation with Green Stone Energy

When it comes to work that can boost home performance, it’s nearly impossible to beat the combination of air sealing and insulation. At Green Stone Energy, we believe air sealing and insulation form the cornerstone of energy efficiency, and every house deserves to be correctly fitted with this powerful pairing. We’ll help you determine what the best course of action may be for taking home performance to the next level, making recommendations that will end up saving you a great deal of money over time.

True home performance is achievable, and air sealing can be exactly what you need to get there.

Contact us today for a free energy assessment


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  • Thank you Dutch and Christian from Green Stone Energy LLC for a job well done. Our family will be feeling much warmer this winter. No more heating the outside.

    Lisa, Alex & Thorsten, Audubon, PA,
  • A really good weatherization Company. Would highly recommend.

    Nancy S.,
  • The work that Green Stone Energy completed at my home was awesome! The crew arrived as scheduled and completed their work in the most timely manner. They were very neat and made sure to clean up after themselves. I couldn't believe that the owner of the company even came to check on the progress... Read More

    Nancy M., West Chester, PA,
  • They arrived when they said they would. spread drop cloths where they would be walking. The owner stopped by to check on the progress. All went well. It took about 8 hours from start to finish. My initial observations are showing a positive improvement in the houses ability to hold temperature... Read More

    John S., Norristown,
  • We contacted Green Stone Energy after a PECO energy audit showed a lack of insulation in our attic. Everyone was very professional, friendly, prompt and did a quality job for us.

    Monica H., West Chester,
  • Estimate was done after a complete examination of my concerns.

    Susan M.,
  • We called in Green Stone Energy after a Peco audit recommendation and had two quotes. One was a bit more involved but also 80% more $$. They answered my many questions and upon recognizing at the start of the project they had forgot to include two small areas in their quote, they included the... Read More

    Jan L., ,Newtown Square
  • Very satisfied with all the work. The installers were very professional, efficient, polite, on time,and kept everything covered and clean.

    Mary K.,
  • I can't thank Dutch Schwertner and his team enough for their thorough evaluation and installation of energy efficiency at my Salon. Andrew and Ryan arrived as scheduled with a smile. Their preparation and communication skills really impressed me . I was so pleased with all the care they took to... Read More

    Susan S.,
  • Extremely pleased with everything we received from Green Stone Energy. Everything, from a prompt and fair proposal to timely service appointment. Did not try to oversell us and even recommended not having certain things done as it would not improve the comfort of our home. The work was done... Read More

    Gary M.,
  • Everything went perfectly. Wonderful staff to work with at all levels. Highest level of professionalism and workmanship. The night that the work was done, warm air was streaming into our third floor bathroom, for the first time ever. We were amazed at how much energy we must have been wasting... Read More

    April & John S.,
  • Mark came and conducted a thorough inspection. A well detailed estimate was provided. On the first date of the 2-day installation Mark came on site to review the intended job. Both installers were pleasant and more than competent. They cleaned up well each day. They installed ceiling and... Read More

    Marilyn C.,
  • Our experience with Green Stone Energy was outstanding. The first visit involved identifying the energy-saving opportunities that our home presented. We discussed those opportunities and I learned why and how the required work would be done. The second visit involved doing the actual work, which... Read More

    Angelo A. ,
  • An estimator came over to review the findings of a PECO energy audit. Dutch went over the recommendations with me, and got me a proposal a few days later. The team doing the work showed up on time and were very professional. They placed drop cloths before working inside the house and vacuumed... Read More

    Michael K.,
  • "We had an initial call with Green Stone (GS) and agreed to get an estimate. We did the same with several other contractors. The GS representative "Dutch" came to our home and was very knowledgeable of the PECO results and provided a detailed list of energy saving measures we could possibly... Read More

    Mike K. ,
  • I wanted to thank you for your help with my insulation job. In particular, I wanted to give a shout out to Greg who was on every aspect of the job. He was detail oriented, knowledgeable, conscientious, and a pleasure to work with.

    Anna Massi,