South Texas Sprayfoam Insulation

South Texas Insulation, a privately owned and operated company, was founded in 2007 and is one of the largest locally owned and operated home insulation solutions companies in the Texas market. Currently servicing homeowners, home builders and commercial properties.

South Texas Insulation is located in San Antonio, Texas and is proud to serve in and around the following communities: San Antonio, Austin, Corpus Christi, Houston, Lotus, Boerne, Bandera, Hondo, Laredo, Rock Port, Kirby and Helotes, Texas.

south texas insulation satifaction guarantee

40% of a home’s energy is lost because of air infiltration – Save up to 50% On Energy Bills

About Us 1

Ernie Slaughter

Owner of South Texas Insulation, San Antonio, Texas

Our Homeowners Say

Adding Insulation has lowered my electric bill significantly! Thanks to the incredible, prompt, quick and reasonably priced job by South Texas Insulation. I would highly recommend them to anyone. We thought our AC unit was not getting the job done but it was lack of insulation!! Thanks again!

Susan C

This has been the absolute best company to work with! From the estimate to actual job completion was fast and easy and very professional!! Ernie, the owner is an awesome guy and really cares about his clients! By far the best insulation company I’ve ever used!!!

Kyle Y

Great work and a great price! Antonio explained the entire process and all the guys were great. I would highly recommend them.

Jimmy D

It’s been a pleasure doing business with South Texas Insulation, when they say there going to do something it gets done on time and on budget.

John O

Outstanding customer service and great job in the attic. The job was performed as required and professional manner.

Alfred B

Always go with STI! They are nothing but professionals. They get the job done right the first time. Ernie was the best! He stayed in contact with us making sure everything was going smoothly, and of course it was. We could have gone with a company closer to us that was about the same costs, but I read the reviews of STI and was sold they were the ones to go with. SO GLAD WE DID. Great job guys. It’s been a year and our shop is 20 degrees cooler than the outside temps and that’s saying something! ?

Tisha C

Expert Spray Foam Insulation Contractor

Mission Statement

South Texas Insulation is committed to providing honest, energy efficient building consultation through the application of spray foam, excellent customer service and reliable workmanship at a fair price.


South Texas Insulation use an accredited high pressure spray polyurethane foam applicator through the SPFA Spray Polyurethane spray Foam Association. With over 12 years of experience.

Honest Energy Efficient Building Consultation

We are a hard working company that delivers a positive return on our client’s property investment. Our objective is to create a more energy efficient, healthier and quieter in-home environment.

Checked for Quality

Each job is supervised to insure South Texas Insulation keeps it’s high standard of quality.


Get a Free Quote Today!

Contact us to get a free quote on your new insulation! Call us at 210.599.8681 today.

Get Your Free Quote