Services We Provide


Greenmark Home Performance stands out from other energy auditors in the St. Louis area because we don't just stop our work after the test has been performed. We want to build a long lasting relationship with the homeowner, so they can rely on us to make their home comfortable and energy efficient

We can help you by providing energy-saving solutions that range from air sealing to having new heating and cooling systems installed by trained, knowledgeable professionals. We will work with our service teams to make sure that all of the work that needs to be done is done in the correct order and as efficiently as possible so that you can get the most out of your time with us.

Once all of the installation and repair work has been done, we will follow up and test your home again, to make sure that our improvements are more efficient and than before. This will help you to rest assured knowing that you are going to be saving energy and money.

We can provide you with the following:

Air Sealing

air sealing

With this technique, we will use the areas of energy loss that we pinpointed in your home during the energy audit, and we will then make sure that we do the necessary repair or installation work to make sure that the problem areas are taken care of.

Most often, air loss is seen through windows, doors, walls, floors, ceilings, attics, and crawl spaces.

A lot of these problems can be taken care of with proper caulking and weatherstripping. Frames around windows and doors need to be air-tight so that your home doesn't experience any additional problems with heat gain/loss. Attics, floors, walls, and ceilings can have fresh insulation installed with fantastic R-values to help with keeping conditioned air inside of your home.

The crawl space will need to be sealed with a process known as encapsulation to keep moisture, excessive humidity, and unwanted critters out of your home.

Heating and Cooling


Your AC and furnace are likely the biggest users of energy in your entire home. If they are over a decade old, they are not going to be as efficient as some of the newer models available on the market today.

We will be sure that your replacement units are the right size for your home. Heaters and AC units that are too big or small are going to cost you in the long run when it comes to trying to save energy. We have many different brands, makes, and models to choose from and our team will help you to choose the best system for your home's unique needs.



When most people hear the word "insulation," they likely think of the pink fiberglass batts that they have seen being placed into walls on home improvement TV shows. However, there have been many advancements over the years in the insulation industry, and some of the best materials on the market today are spray foam and cellulose. They can be installed quickly, and they are both known for being incredibly thermal, air, and sound barriers inside a home.

The materials can be installed in wall, floor, attic, or ceiling cavities, and the type needed will depend on where it's going to be installed and for what purpose.

Air Quality

air quality

During the energy audit, we will test the air of your home to see what contaminants are present. This may include Radon, mold spores, allergens, and so on. These are all things that your family is breathing in on a daily basis.

Depending on what contaminant is found, we can install special ventilation systems, waterproofing systems for mold and mildew control, seal the crawl space, and so on.

Duct Sealing

duct sealingWhen you have duct work in your home that transports air throughout all the rooms and levels, it can get clogged up with dirt and dust. When this happens, air cannot move as easily, and it can cause problems. If there are holes in the duct work, air is escaping, and this can cause your heating and cooling systems to work much harder than they should to keep your family comfortable throughout each season of the year.

Average rating for Greenmark Home Performance is 5 stars of 5 stars - based on 12 reviews