DC Sustainable Energy Utility
Your Guide to Green

Insulation and Air Sealing

Save 20% or more on your annual heating and cooling bills.

When installed together, air sealing and insulation are the most cost effective way to save energy, reduce your heating and cooling bills, and make your home more comfortable.

Find a qualified contractor for your project

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Air leaks add up to energy loss

Did you know that the average home has enough air leakage to add up to a two-foot-square hole? That is like leaving a small window open 24 hours a day. This is usually the biggest source of energy loss in a home. Sealing holes, cracks, chases and penetrations is one of the quickest ways to make your home more comfortable and efficient.

The energy audit identifies areas of your home that are in need of air sealing (before you insulate make sure that your home is properly air sealed).

A blower door test, performed during a home energy audit, locates air leaks. Blower door tests are performed by Home Performance contractors before and after air sealing to measure the effectiveness of their work.

Insulation plus Air Sealing equals comfort, winter and summer

Many homes are missing a simple but important piece of the energy efficiency equation: proper insulation. Many older homes have less insulation than homes built today, but even adding insulation to a newer home can pay for itself within a few years. Insulating your attic/ceiling and floors keeps you comfortable throughout the year, reduces outside noise, prevents ice dams in the winter, saves energy, and reduces your heating and cooling costs.

A Home Performance contractor will include an insulation check as a routine part of a whole-house energy audit, and provide recommendations for adding insulation. Find a Home Performance contractor to help improve the efficiency of your home with air sealing and insulation.

How the DCSEU can help


The DCSEU doesn’t perform energy audits and no longer offers incentives for air sealing and insulation, but we can help you find a qualified contractor. Homeowners are encouraged to call the DCSEU with questions and for any and all energy efficiency guidance.

Find a Contractor

Elysian Energy, LLC
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14300 Cherry Lane Ct Suite 214
Laurel, MD 20707
(202) 455-0644

Complete Home Solutions, LLC
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5463 Southern Maryland Blvd Suite #18
Lothian, MD 20711
(443) 333-4999

Ecobeco LLC
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107-A W. Edmonston Drive
Rockville, MD 20852
(240) 396-2141

Energy Efficiency Experts
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9327 Fraser Avenue
Silver Spring, MD 20910
(202) 557-9200

Leone Tech, LLC
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700 12th Street NW Suite 700
Washington, DC 20005
(202) 904-2486

Home Energy Medics
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817 22nd St S
Arlington, VA 22202
(703) 447-5379

Edge Energy
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7904 Foxhound Rd
Mclean, VA 22102
(888) 586-3343

Eko Smart Solutions, LLC
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3213 Duke St Suite 717
Alexandria, VA 22314
(888) 389-3551


Contact the DCSEU to help you select a Home Performance contractor for your project at 202-479-2222 or info@DCSEU.com.

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DC Sustainable Energy Utility
80 M Street SE, Suite 310, Washington, DC 20003 E info@dcseu.com
P 202-479-2222 F 202-450-1552 Toll-Free: 855-MY-DCSEU (855-693-2738)
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