Expert Insulation Contractor in San Marcos, TX
Are you tired of skyrocketing energy bills and an uncomfortable home environment? Stellrr Insulation & Spray Foam is your trusted San Marcos partner for creating a more energy-efficient and comfortable living or workspace. We specialize in high-performance spray foam and a variety of insulation services designed to combat the intense Texas climate. Our expert team is dedicated to providing homeowners and businesses in the San Marcos area with top-tier insulation solutions that deliver lasting results. Lower your utility costs, enhance your indoor air quality, and enjoy a more consistent temperature year-round. Contact us today at (512) 710-2839 for a free consultation and discover the difference professional insulation can make.
Posted on luciaTrustindex verifies that the original source of the review is Google. Sterll did an amazing job cleaning out our attic. They removed all the old insulation and rodent waste thoroughly, then installed spray foam insulation that has completely transformed the space. Afterward, I sealed the attic, which will help lower our energy bills and keep the temperature stable. What impressed me most was how clean and non-toxic the process was, they left the air fresh and the entire area spotless. The team was professional, efficient, and detail-oriented from start to finish. Highly recommend Sterll for anyone looking to clean, sanitize, and insulate their attic properly!Posted on Erica IngierTrustindex verifies that the original source of the review is Google. Stellrr insulation is running a top notch business. We are very happy with the results of our project, most importantly, but our communications with Pickle and Wayne were timely, thorough, and overall great. Their timeline was also excellent, which isn’t always the case with home improvement projects. From the time they quoted us to the time getting the job done was speedy. We are happy with their work and appreciative. Erica I.Posted on Roland MerzTrustindex verifies that the original source of the review is Google. I want to thank Wayne and Angel for their quick response in helping us out. We were doing a construction project on our student center in San Marcos Tx. and found out that we needed to have a dumpster on site before we could proceed. I made a call to Wayne with dumpstersaurus dumpsters and explained my situation. He was quick to respond and had me a dumpster at the construction site the same day saving us from having the project shut down. Not only did he get it there the same day but the price was very fair and service was very friendly. In today’s business world it was very refreshing to have a company that was trustworthy, quick to respond with same day friendly service, and a very fair price, If you are needing a dumpster I highly recommend dumptersarus dumpsters. Thank you dumpstersaurs dumpsters. Roland M.Posted on John FarleyTrustindex verifies that the original source of the review is Google. Pickle and the entire team did an amazing job from start to finish. From bidding to implementation, they really did the best job. Today our house is cooler than ever! Thanks Stellr!Posted on Ashley KolarTrustindex verifies that the original source of the review is Google. Stellr Insulation was fast and efficient. We needed to have a job done quickly and they were very accommodating and even were able to move our appointment up a day. We especially appreciated Pickle as he always kept us informed throughout the process!Posted on Michael Cleveland OsborneTrustindex verifies that the original source of the review is Google. Very efficient, really friendly service, highly recommend all aroundPosted on Nathaniel GrangerTrustindex verifies that the original source of the review is Google. Choosing this company for our attic insulation was a great decision. They got the job done quickly and efficiently, and their team was super organized and professional. Everyone was courteous, and they left the space spotless when they finished. We're really happy with the results, our home feels more comfortable and energy-efficient already. Highly recommend them to anyone looking for quality insulation work!Posted on Camella BridgesTrustindex verifies that the original source of the review is Google. I had a great experience with Stellrr because the team is awesome. Pickle was so helpful and nice to work with. Frank and Jorge did the insulation work and it went super smoothly. The owner, Wayne, is awesome too - thanks for your extra help, Wayne!Posted on LailaTrustindex verifies that the original source of the review is Google. This is an amazing company! I highly recommend. Stellr has been great to work with. Everyone we were in contact with has been super friendly, polite, and professional. They take the time to explain all of the options for your attic and pricing is straightforward. Sheldon worked with us and he was always so helpful and professional. The two gentleman that came to do the insulation were very hardworking, courteous, and finished ahead of schedule. One of the men even helped bring in a heavy delivery for me- even though he had a huge day of work ahead for him. (I forgot his name, but Stellr knows- because I let them know how impressed I was with his help). The owner Wayne and his wife are wonderful to work with and made sure everything went smoothly. Give these guys a call. Truly excellent company.Posted on Joshua MorrisTrustindex verifies that the original source of the review is Google. I told Stellrr that I would post a review when I had data to back it up. 18 months later, I do: In summer of 2024, we never turned off our A/C. And we saved $1160.71 (58%) vs 2023. This is a likely underestimate of annual savings, since Stellrr installed the foam in May of 2023. I've uploaded a timeline of our gas and electricity bills as we've made multiple improvements--not just spray foam. The gap between what we pay with these improvements and what we would've paid without them will grow bigger forever: energy will never get cheaper. So, here's my empirical take mixed with a bit of common sense: Stellrr's foam insulation provides good value, but without it, other energy-saving improvements will provide half the value they could. It's a foundational improvement--something you do *first*. It's what a nerd's nerd would call "a force multiplier," meaning it makes other improvements vastly more effective by being there. And so you should get it early in your "healthy and efficient home" journey. Unpacking that a bit: from a straight-up balance sheet, we will not ROI on Stellrr, solar, HVAC, electric appliances, and the other improvements we've made. But not breathing all that particulate matter from the nearby interstate? All the gas stove fumes we won't be inhaling? Hell, it's not unlikely we ROI on not having to pay for extended medical care in 30 years. So, if you're into a better quality of life that--bare minimum--mostly pays for itself, I'd recommend doing things In this order: 1. FIRST: Update your ducting, minimally, and your ventilation fans. My only regret--these are hard to do with foam there. 2. Get Stellrr's spray foam. They'll do the best job. 3. Look into a mid-high efficiency heat pump. ($2k tax credit, at least!) Spring a bit extra for an energy-recovery ventilator, installed professionally. Get a UV bulb for that alpine air feeling. 4. Consider solar (30% tax credit til like 2033!)l; also, batteries. 5. If you got those batteries, enroll in Austin Energy's Time of Use program so that you can coast on battery power when electricity is expensive (3-7PM). We do just fine on 20kWh. Bonus: some outage protection! I wasn't the easiest customer--I had a point or two of frustration (communications) with the company during the install. Stellrr sells their product hard, but... like all things ahead of their time, they have to make a complex case that won't appeal to everyone because the value of having an airtight, well-insulated home simply isn't obvious to all. I'm glad I listened--they were right!
Our Services
Residential Insulation
Open Cell Insulation
Closed Cell Insulation
Commercial building Insulation
Cellulose Insulation
Attic Insulation
Insulation Removal
Crawlspace Insulation
Wall Insulation
Commercial Spray Foam Insulation
Residential Spray Foam Insulation
Our Promise to San Marcos
Expertise You Can Trust
We provide customized insulation solutions for every home and business.
Quality Materials
Our materials are top-quality for long-lasting performance.We use only the best materials to ensure long-lasting performance.
Customer-Focused Service
Our certified technicians ensure a professional installation every time.
Energy Savings
Your satisfaction is our ultimate goal and top priority.
Exploring San Marcos: More Than Just a College Town
A crystal-clear, spring-fed river that remains a cool 72 degrees year-round, perfect for tubing, kayaking, and paddleboarding.
Take a unique glass-bottom boat tour to see the headwaters of the San Marcos River and the diverse aquatic life it supports.
Explore the nation’s only true example of an earthquake-formed cave and enjoy a variety of family-friendly attractions.
The heart of the city, featuring historic architecture, unique shops, diverse restaurants, and a lively nightlife.
A shopper’s paradise with over 140 luxury and brand-name stores, making it one of the largest outlet shopping centers in the country.
Learn about the formative college years of President Lyndon B. Johnson, who was a student at what is now Texas State University.
Mini Case Study:
A homeowner in the historic district of San Marcos was struggling with high energy bills and uneven temperatures in their older home. After a thorough assessment, our team installed closed-cell spray foam insulation in the attic and crawl space. The result was a significant reduction in their monthly energy costs and a much more comfortable and consistent indoor environment.
What your neighbors in San Marcos say about our Spray Foam services
Posted on luciaTrustindex verifies that the original source of the review is Google. Sterll did an amazing job cleaning out our attic. They removed all the old insulation and rodent waste thoroughly, then installed spray foam insulation that has completely transformed the space. Afterward, I sealed the attic, which will help lower our energy bills and keep the temperature stable. What impressed me most was how clean and non-toxic the process was, they left the air fresh and the entire area spotless. The team was professional, efficient, and detail-oriented from start to finish. Highly recommend Sterll for anyone looking to clean, sanitize, and insulate their attic properly!Posted on Erica IngierTrustindex verifies that the original source of the review is Google. Stellrr insulation is running a top notch business. We are very happy with the results of our project, most importantly, but our communications with Pickle and Wayne were timely, thorough, and overall great. Their timeline was also excellent, which isn’t always the case with home improvement projects. From the time they quoted us to the time getting the job done was speedy. We are happy with their work and appreciative. Erica I.Posted on Roland MerzTrustindex verifies that the original source of the review is Google. I want to thank Wayne and Angel for their quick response in helping us out. We were doing a construction project on our student center in San Marcos Tx. and found out that we needed to have a dumpster on site before we could proceed. I made a call to Wayne with dumpstersaurus dumpsters and explained my situation. He was quick to respond and had me a dumpster at the construction site the same day saving us from having the project shut down. Not only did he get it there the same day but the price was very fair and service was very friendly. In today’s business world it was very refreshing to have a company that was trustworthy, quick to respond with same day friendly service, and a very fair price, If you are needing a dumpster I highly recommend dumptersarus dumpsters. Thank you dumpstersaurs dumpsters. Roland M.Posted on John FarleyTrustindex verifies that the original source of the review is Google. Pickle and the entire team did an amazing job from start to finish. From bidding to implementation, they really did the best job. Today our house is cooler than ever! Thanks Stellr!Posted on Ashley KolarTrustindex verifies that the original source of the review is Google. Stellr Insulation was fast and efficient. We needed to have a job done quickly and they were very accommodating and even were able to move our appointment up a day. We especially appreciated Pickle as he always kept us informed throughout the process!Posted on Michael Cleveland OsborneTrustindex verifies that the original source of the review is Google. Very efficient, really friendly service, highly recommend all aroundPosted on Nathaniel GrangerTrustindex verifies that the original source of the review is Google. Choosing this company for our attic insulation was a great decision. They got the job done quickly and efficiently, and their team was super organized and professional. Everyone was courteous, and they left the space spotless when they finished. We're really happy with the results, our home feels more comfortable and energy-efficient already. Highly recommend them to anyone looking for quality insulation work!Posted on Camella BridgesTrustindex verifies that the original source of the review is Google. I had a great experience with Stellrr because the team is awesome. Pickle was so helpful and nice to work with. Frank and Jorge did the insulation work and it went super smoothly. The owner, Wayne, is awesome too - thanks for your extra help, Wayne!Posted on LailaTrustindex verifies that the original source of the review is Google. This is an amazing company! I highly recommend. Stellr has been great to work with. Everyone we were in contact with has been super friendly, polite, and professional. They take the time to explain all of the options for your attic and pricing is straightforward. Sheldon worked with us and he was always so helpful and professional. The two gentleman that came to do the insulation were very hardworking, courteous, and finished ahead of schedule. One of the men even helped bring in a heavy delivery for me- even though he had a huge day of work ahead for him. (I forgot his name, but Stellr knows- because I let them know how impressed I was with his help). The owner Wayne and his wife are wonderful to work with and made sure everything went smoothly. Give these guys a call. Truly excellent company.Posted on Joshua MorrisTrustindex verifies that the original source of the review is Google. I told Stellrr that I would post a review when I had data to back it up. 18 months later, I do: In summer of 2024, we never turned off our A/C. And we saved $1160.71 (58%) vs 2023. This is a likely underestimate of annual savings, since Stellrr installed the foam in May of 2023. I've uploaded a timeline of our gas and electricity bills as we've made multiple improvements--not just spray foam. The gap between what we pay with these improvements and what we would've paid without them will grow bigger forever: energy will never get cheaper. So, here's my empirical take mixed with a bit of common sense: Stellrr's foam insulation provides good value, but without it, other energy-saving improvements will provide half the value they could. It's a foundational improvement--something you do *first*. It's what a nerd's nerd would call "a force multiplier," meaning it makes other improvements vastly more effective by being there. And so you should get it early in your "healthy and efficient home" journey. Unpacking that a bit: from a straight-up balance sheet, we will not ROI on Stellrr, solar, HVAC, electric appliances, and the other improvements we've made. But not breathing all that particulate matter from the nearby interstate? All the gas stove fumes we won't be inhaling? Hell, it's not unlikely we ROI on not having to pay for extended medical care in 30 years. So, if you're into a better quality of life that--bare minimum--mostly pays for itself, I'd recommend doing things In this order: 1. FIRST: Update your ducting, minimally, and your ventilation fans. My only regret--these are hard to do with foam there. 2. Get Stellrr's spray foam. They'll do the best job. 3. Look into a mid-high efficiency heat pump. ($2k tax credit, at least!) Spring a bit extra for an energy-recovery ventilator, installed professionally. Get a UV bulb for that alpine air feeling. 4. Consider solar (30% tax credit til like 2033!)l; also, batteries. 5. If you got those batteries, enroll in Austin Energy's Time of Use program so that you can coast on battery power when electricity is expensive (3-7PM). We do just fine on 20kWh. Bonus: some outage protection! I wasn't the easiest customer--I had a point or two of frustration (communications) with the company during the install. Stellrr sells their product hard, but... like all things ahead of their time, they have to make a complex case that won't appeal to everyone because the value of having an airtight, well-insulated home simply isn't obvious to all. I'm glad I listened--they were right!
Your Trusted Local Insulation Experts
Choosing Stellrr Insulation & Spray Foam means partnering with a team that is committed to the comfort and satisfaction of our San Marcos neighbors. We understand the specific challenges of insulating homes in Central Texas and utilize the most effective materials and techniques to deliver exceptional results.
By creating a complete thermal and air seal, we help you save money, improve your indoor air quality, and create a more comfortable living or working environment. We are dedicated to providing outstanding customer service and workmanship on every project.
Serving Areas:
Downtown San Marcos, Blanco Gardens, Blanco Vista, Blanco River Village, Castle Forest, Greater Castle Forest, Dunbar, East Guadalupe, East San Marcos, Franklin Square, Heritage, Hills of Hays, Southwest Hills, Hunter’s Hill, Hunter’s Hill Estates, Kissing Tree, La Cima, Millview East, Millview West, Northern San Marcos, Oak Heights, Rio Vista, Saddlebrook, Saddletree Ranch, Springs at High Branch, Sunset Acres, Trace, Whisper, Western San Marcos, Hunter Ridge, Hunter’s Ridge, Castle Hills, Castle Forest adjacent areas, Downtown University-adjacent neighborhoods.
Counties Served:
Our service area primarily includes Hays County, and we also serve portions of Guadalupe County, Comal County, and Caldwell County that are in the vicinity of San Marcos.
Ready for a More Comfortable and Energy-Efficient Property?
Ready to enhance the comfort and energy efficiency of your San Marcos property? Contact Stellrr Insulation & Spray Foam today for a free, no-obligation estimate. Let us show you why we are the trusted choice for spray foam insulation in San Marcos, TX. Call us at (512) 710-2839 or fill out our online form to get started.
FAQS
What are the signs that my San Marcos home needs new insulation?
Some common indicators of insufficient insulation include high energy bills, rooms that are difficult to keep cool in the summer, uneven temperatures throughout your house, and your HVAC system running constantly.
What is the best type of insulation for the hot Texas climate?
Spray foam insulation, both open and closed-cell, is an excellent choice for Texas homes due to its superior ability to create an air seal, which stops the transfer of hot, humid air. Radiant barriers installed in the attic are also highly effective at reflecting the sun’s heat.
How much does spray foam insulation cost in the San Marcos area?
The cost of spray foam insulation can vary depending on the size of the area to be insulated, the type of spray foam used (open-cell or closed-cell), and the complexity of the job. We provide free, detailed estimates to give you an accurate cost for your specific project.
Can new insulation really lower my energy bills?
Absolutely. By preventing the transfer of heat, proper insulation reduces the workload on your HVAC system, which is a significant portion of your energy consumption. This can lead to substantial savings on your monthly utility bills.
How long does an insulation installation take?
The duration of the installation process depends on the size of your property and the type of insulation being installed. Most residential projects can be completed in one to two days. We will provide you with a clear timeline before we begin any work.