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Air Sealing

Most homes lose between 40% and 60% of their conditioned air due to leakage every hour.  This level of leakage can account for 40% of your heating and cooling costs. Additionally, air leaks make a home feel drafty.

 What is it?

Air leakage can be reduced using a variety of tools such as expanding foam, caulking, airtight can light kits, weatherstripping .  Most homes leakage can be reduced between 15% and 50% using these methods.

The Stack Effect

The stack effect occurs in all homes. Simply stated, hot air rises, and escapes through the attic. As this air escapes, your home pulls in more cold air through the foundation and lower extremities in order to maintain the balance of pressure pre-existing in your home.

Many drafts that you feel are the direct result of the stack effect. Good air-sealing and a continuous air barrier between the attic and the home’s conditioned (living) space are important, not only to save energy and reduce fuel bills, but also to prevent moisture problems in the attic.

Sealing the foundation will further slow the stack effect. Sealing the sides (such as doors, windows, walls, outlets, etc.) will reduce more localized drafts.

Air Sealing

NACH Rating

  • 1.0 & Higher- Sever air leakage
  • .75 to .99- Extremely leaky
  • .50 to .74- Very leaky
  • .35 to .49 Fairly leaky
  • .20 to .34 Fairly airtight (goal for most homes)
  • .10 to .19 Very airtight (Mechanical ventilation needed)
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I first ordered an energy audit subsidized by XCEL. Based on the discussions with Paul of Energy Geeks and the excellent audit report, I began to mediate several items causing energy loss. I then got a bid from Energy Geeks for the final step of augmenting the attic blown in insulation.

The professionalism, scheduling, follow through, pricing and work quality from Energy Geeks were all excellent. They did a thorough job on the initial energy audit. At my request they provided several bid options to correct the caulking, knee wall repair, can light leakage, and attic insulation. I evaluated their bid and compared it to other options. Their prices were accurate and fair. At all points they kept me informed on scheduling. They arrived promptly and left the house clean after the insulation install. I highly recommend the company!

David F., Castle Rock, CO April 23, 2019

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Energy audit and insulation Excellent service. They are very friendly and knowledgeable. Paul was so thorough in the audit, pointing out areas in need of caulking or other sealant. Scotty and Dave took the time to make sure the tough areas in the attic were covered with the insulation.The house was markedly warmer on completion of the work. Paul also did a hot water heater check for carbon monoxide. I am very happy with the work done.

Mary F., Parker CO April 23, 2019