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Average rating for Greenmark Home Performance is 5 stars of 5 stars - based on 10 reviews
Remove and replace old attic insulation; install attic venting system, including Dura Vent attic ventilation channels between the rafters to maintain airlow from eaves into attic; install and seal can lights, bathroom extractor fans; vent exhaust fans thr in Chesterfield, MO
Mark Inman knows what he's doing. Before the work was done on our house, on a warm/hot day the 2nd floor was uncomfortably hot, the ground floor was cold and the basement was freezing. Yesterday (July 9, 2017) the high was 97 degrees and the house was comfortable throughout (with A/C on) with very little temperature difference between floors, including the basement. Last night the 2nd floor sleeping temperature was perfect and the rest of the house was normal. Prior to the work we would have had the A/C and ceiling fans blasting all night to control the bedroom temperature and in the morning the kitchen would have been like an icebox! Fairly expensive but money well spent. Thank you Mark!
John Devon - Chesterfield, MO 63017
Indoor air Quality in St. Louis, MO

Mark visited our office and was very informative about options we have on how to improve the air quality in the office.  I was so impressed with his knowledge and ability to effectively communicate how the hvac system is intergrated with other variables that make up quality of air we breathe.

 

 

Dan G. - St. Louis, MO 63122
crawl space encapsulation in O Fallon, IL
Work performed: Crawlspace Encapsulation.
 
"I was very satisified with Greenmark Home Performance.  They came out and air sealed my attic, added insulation, added ventilation and I had my crawlspace encapsulated.  I am very happy with all the work that was done! My home is more comfortable and I have noticed the savings in energy!  Mark was very nice and the gentlemen he had come out were great!  They cleaned up after themselves and were very careful around my home.  I look forward to having them come back out whenever I decide to do any more upgrades to my home.  I am very happy that I chose this company, great job!
Bev - O Fallon, IL 62269
air sealing in O Fallon, IL
Work Done:  Air Sealing
 
"I was very satisified with Greenmark Home Performance.  They came out and air sealed my attic, added insulation, added ventilation and I had my crawlspace encapsulated.  I am very happy with all the work that was done! My home is more comfortable and I have noticed the savings in energy!  Mark was very nice and the gentlemen he had come out were great!  They cleaned up after themselves and were very careful around my home.  I look forward to having them come back out whenever I decide to do any more upgrades to my home.  I am very happy that I chose this company, great job!
Bev J - O Fallon, IL 62269
Crawl Space Encapsulation in Edwardsville, IL
Mark came out to give us an estimate to encapsulate our crawl space area. He was very knowledgeable about the problems and explained the possible solutions.
Kathy & Mark T - Edwardsville, IL 62025
Replacement Doors in Mascoutah, IL
We had Greenmark Home Performance come out for a door. We were very satisfied with the company and the product. If we had any questions or concerns, Mark was quick to respond and answered them promptly. We really liked the fact when Mark came out, he did exactly what we asked him to do, didn't try to sell us anything we didn't want or need. He was very professional, informative and courteous. If we decide to do any other projects, we will definitely be giving them a call to come back out. We are a satisfied customer!
Gary C - Mascoutah, IL 62258
Energy Audit in Belleville, IL
We had the representative come out for an Energy Assessment. We found that he was very informative, professional and not high pressure. He explained in great detail about the program and helped us with any questions or concerns that we may have had. His experience and understanding made us feel comfortable with the program and the company. He made it very personable with us and helped us a great deal. We are very happy with the final results and when we are looking to do some other types of work, Greenmark Home Performance will be first on the list.
John W. - Belleville, IL 62223
Replacement Doors in Mascoutah, IL
We were very happy with Greenmark Home Performance. The door was exactly what we were looking for. We really liked how Mark did exactly what he said he would do without trying to sell us something we didn't need. He was very professional and courteous. We will likely be calling them for future projects.
Gary - Mascoutah, IL 62258
Energy Audit in Saint Louis, MO

Energy Audit Performed in St. Louis MO

Jess B. - Saint Louis, MO 63116
energy audit in Saint Louis, MO

We were unaware of what was involved in an energy audit and your audior took the time to explain everything. We were impressed with the report which told us the areas in which we need to take action on. He never pressured us to use any particular contractors, he just suggested that we go to the HomeEnergyTeam web site to select contractors of our own choice. He did an excellent job and we HIGHLY recommend the Home Energy Team Affiliates. We already have recommended them to several of our neighbors. Again, EXCELLENT JOB!

Cynthia Simpson - Saint Louis, MO 63122