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Stay Comfortable with South Texas Insulation

Whether you’re a homeowner looking to add insulation in your attic or you’re a builder seeking a reputable insulation installer, South Texas Insulation is here to help. We are a locally owned insulation contractor and building science consultant that specializes in blown and batt fiberglass insulation, spray foam, home insulation, commercial services, and more. Since 2007, we’ve built a reputation for our customer-centric service and exceptional workmanship. Our installers are professionally trained and certified, so our customers know they will receive consistent top quality. Our local San Antonio crews are communicative, thorough and timely at every step of every project.

Home Intro

Our Mission

We are committed to providing honest, energy-efficient building consultation, excellent customer service and reliable workmanship at a fair price.

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Home 1

We Proudly Service

Home 3
This was a great experience. The best customer service and quick response time. If you need insulation, this is who you need to use!!

Lilia Jones
Good Insulation Company to have on your speed dial, good company to work for as well.

Norma Jean Castro
Good job on 7th guys

Paul Stubbs
They showed up on time as promised, the work was completed quickly and no clean up was necessary after they left. The resident said the insulation makes a world of difference and are very comfortable, as we all deserve to be. I highly recommend ST Insulation. I had shopped around and the price was very fair. The service is quick, best of all, high quality. I have a comfortable and happy family in their home. Warm when its cold and very cool when it is scorching hot. As we all deserve.

Lyndia S.
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.
Work done well, great guys! Fair prices!

Mike A.
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.
We were very pleased with the spray foam insulation they did for us.

Rhonda H.
These guys have been super-consistent on my projects for a long, long time. I would definitely recommend them for your insulation needs.

Jim F.
I brought them in to blow fiberglass in our attic. On time. On budget. No drama. Would hire them again without hesitation.

Greg D.
Super happy with South Texas Insulation from obtaining the blow-in insulation quote and scheduling the work to the actual installation. Ernie responded to all questions and concerns prior to installation and turned around CPS paperwork within a couple of hours. Now I’m enjoying a cool and sound insulated house. Highly recommended!

Roger M.
I have never recommended a company before but I recommend this company. The management was personable and always available for my phone calls and questions. Antonio was amazing with his crew taking care of my house and I never worried one second about anything . Very professional group of people. I highly recommend this company.

Kimberly M.
The workers showed up on time, got the work done in a reasonable amount of time, and were very friendly.

Brent S.