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TRUSTED BY AFFTON, MO HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon89
    Verified energy efficiency auditing services reviews

Top-Rated Energy efficiency auditors in Affton - Updated Nov 2026

Avatar for St Louis Insulation
St Louis Insulation
4.9(
67
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2001

Free estimates

Credit card accepted

"I was totally satisfied with this Company from the beginning to the end. I scheduled an appointment and was seen right away. A representative came to my home and assessed what I needed to have done. The price was reasonable and the work was completed in a timely fashion. I would recommend this Company in a HEARTBEAT!! Thanks for ALL that you DO!!"
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+40

Recommended by98%of homeowners
Avatar for Foam Engineers
Foam Engineers
4.8(
229
)
Home Energy Audit

Serving Affton, MO and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"Fantastic experience with Paul, Mindy and their team when they helped us insulate the attic spaces surrounding and above our 1.5 story house. We have immediately seen the benefit from the insulation through our energy consumption, reducing the run-time of our unit by ~4 hours a day on like-weather days. This team will take care of your exact needs by tailoring their solutions to your specific situation and they don't cut any corners in ensuring your getting the value deserved!"
Top Plates/ Wiring
Top Plate / wiring
Sealed Duct Work
Sealed Duct Work
Sealed Duct Work

+17

Response time9 hrs
Recommended by98%of homeowners
Peterson Energy Consultants
3.9(
67
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 1978

"We called for a quote and Mindy came the same day to review our spaces and provide a price. After rain cancelled our first installation, the second date was dry and the team of three guys were on time. They reviewed where we wanted the tubes and took their time with the installation. The addition of natural light makes a huge difference and we are very satisfied with the product and the installation."
Recommended by80%of homeowners
Avatar for Gant Heating and Cooling
Gant Heating and Cooling
5.0(
10
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2006

Free estimates

Emergency services offered

At Gant Heating and Cooling we are the top rated Heating and AC provider in the St. Louis area. With over 20 years of experience no job is too complex for us. We cover all residential and commercial repairs, replacements, and new construction jobs. We are experts at solving problems and helping our customers find the most cost effective way to fix their problem. Call us today for your free estimate! Repair and service HVAC equipment

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+1

Recommended by100%of homeowners
Al's Handyman Service
4.8(
45
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2004

Free estimates

"I have worked with Al on several occasions now.  I CANNOT say enough good things about his service!  He is responsive, trustworthy and just plain good at fixing stuff!  We trust him to go to our home even when it is vacant to assess and repair areas as needed.  He is conscientious and a great provider to work with!
"
Recommended by92%of homeowners
Avatar for American Society of Heating & Cooling Specialists
American Society of Heating & Cooling Specialists
5.0(
1
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 1995

Emergency services offered

Credit card accepted

HVAC Technicians At Your Service Since 1991; As a fully licensed, bonded and insured air conditioning, heating and ventilation company, American Society of Heating and Cooling Specialists provides residential and commercial maintenance, installation and repair services on all major brands of heating, air conditioning and restaurant equipment to customers throughout St. Louis, St. Charles, and the surrounding areas.

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Recommended by100%of homeowners
Avatar for Happy Roof
Happy Roof
3.3(
22
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2015

Free estimates

Emergency services offered

Happy Roof is a locally owned company who specialize exterior improvements. Located in St. Charles, MO, we serve the entire metro area. We use only the highest quality material and trained professional craftsman. \n \nWhen interacting with Happy Roof, you will notice that we are particularly focused on the principles of quality workmanship, timely completion, competitive pricing, and integrity in all our business dealings. We combine knowledge and research, with our extensive practical experience, to ensure a specialized approach for your project. \n \nContact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing, list of happy customers.

Slate Replica
Slate title profile
Slate title profile
Spanish Clay
Slate title profile

+46

Response time2 days
Recommended by71%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

R-value measures an insulation material's thermal resistance, indicating its ability to resist heat transfer. A higher R-value signifies better insulation performance because the material is more effective at slowing heat flow. The R-value depends on the type, thickness, and density of the insulation material, such as fiberglass, foam, or cellulose. Each inch of insulation typically provides an R-value between 3 and 8. There is no single universal R-value; the optimal choice depends on your climate zone. Colder climates require a much higher R-value than warmer ones to maintain energy efficiency, keep the home warm in winter and cool in summer, and manage costs.

Provide utility bills and clear access to all areas of the home, including the attic and basement.

There are several signs that your house might have poor ventilation, including lingering odors, condensation on your windows, or mold and mildew. Your home may also feel stale and stuffy, or you might have trouble maintaining a comfortable temperature in your home. On top of that, you might develop allergy symptoms, such as sneezing, coughing, or headaches.

Yes, energy-efficient options such as LEDs and solar-powered lights are available. These alternatives consume less electricity, resulting in lower utility costs. They are also more environmentally friendly due to their reduced carbon footprint and longer lifespan.

A whole-house humidifier can positively impact energy consumption by improving heating efficiency. During colder months, humidified air feels warmer, which allows you to lower your thermostat without sacrificing comfort. This adjustment can lead to significant energy savings as your heating system works more efficiently. However, it's important to use the humidifier judiciously, as excessive humidity could potentially strain your cooling system in warmer months.

The Affton, MO homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.