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TRUSTED BY SAN MARCOS, TX HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon143
    Verified insulation services reviews

Top-Rated Insulation pros in San Marcos - Updated Nov 2026

Avatar for Affordable Insulation, LLC
Affordable Insulation, LLC
5.0(
58
)
Blown-In Insulation - Install or Upgrade

Serving San Marcos, TX and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"We worked together to find the best product on the market to do the retrofit which went in quickly and the insulation smoothed out all the attic and upgraded the performance."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+35

Response time2 days
Response rate100%
15 neighbors recently requested a quote
Avatar for Insulation Services
Insulation Services
5.0(
9
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving San Marcos, TX and surrounding areas

Approved

In business since 1991

Free estimates

Customers say: True professional

"Mr Lenard arrived at my block and beam farm house spent as long as necessary talking through options and prices points for old under house insulation removal and replacement with spray foam. He also walked through actions I should take to reduce moisture collection underneath the house. Leonard was patient with my schedule while I actioned the recommendations, and finally, spray foam work conducted was above expectations. Thank you Leonard and the Insulation Services team, when it’s time to insulate the barn, I’ll be calling again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time3 days
Response rate100%
5 neighbors recently requested a quote
Avatar for Texas Pro Insulators, LLC
Texas Pro Insulators, LLC
4.4(
58
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving San Marcos, TX and surrounding areas

Approved

Super Service Award Winner

In business since 1995

Free estimates

Warranties offered

"Nick was very informative and we discussed all the options. The work, solar panels and blown insulation, was very professionally installed and the crew was courteous and answered all our questions. Iâ m looking forward to reduced energy costs this summer."
Certified Installation
Certified Installers
E-Shield reflective insulation
E-Shield plus Blown in
E-Shield plus Blown in

+3

Response time2 days
2 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Koala Insulation of Texas Hill Country
Koala Insulation of Texas Hill Country
5.0(
7
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+2 more

Serving San Marcos, TX and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Bottom line: I would hire this company again. Koala Insulation came and inspected my attic spaces with a infrared scanning tool. They looked at the level of insulation and found areas where the heat was penetrating more. They recommended specific actions and gave me a number of quoted options on the spot. I was then able to book the service within days of the initial visit. The technicians came and performed the service professionally and made sure to involve me where needed. I would hire them again."
Blown Insulation After
Blown Insulation Before
Blown Insualtion After
Blown Insulation Before
Shipping Container - Closed Cell Spray Foam

+4

Response time7 hrs
Response rate100%
19 neighbors recently requested a quote
Avatar for Titan Siding, Windows, and Exteriors, LLC
Titan Siding, Windows, and Exteriors, LLC
4.7(
160
)
Spray Foam Insulation - Install

Serving San Marcos, TX and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

Titan Siding, Windows and Exteriors based in Austin is proud to employ the most experienced crews in the industry and we back up our installations with a lifetime labor warranty. Titan is your one-stop shop for all your Austin exterior home remodeling needs. We specialize in the installation of award winning products such as James Hardie® fiber cement siding and trim, Simonton®, Andersen®and ViewPoint replacement windows and doors, and Senox seamless aluminum gutters. Hardie Plank is the industry leader in the replacement siding market and Simonton is a three time winner of the JD Power and Associates award for vinyl replacement windows. Titan offers Andersen window installation which is considered to be amongst the “greenest” windows in the industry and we also install WeatherLok windows by Atrium. For your roofing needs, Titan uses only the most trusted roofing products in the industry so our clients can rest assured they have the best products and warranties.

Windows
Windows
Windows
James Hardie Siding
Siding

+5

Recommended by97%of homeowners
Avatar for iFoam Hill Country
iFoam Hill Country
New to Angi
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving San Marcos, TX and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

iFOAM of Hill Country TX is a locally owned and operated insulation company serving homeowners, builders, and businesses throughout the Texas Hill Country. We provide expert installation of a wide range of insulation systems designed to improve energy efficiency, indoor comfort, and overall building performance.\n\nOur experienced team installs all types of insulation, including fiberglass, cellulose, and other traditional systems. However, we specialize in advanced spray foam insulation, offering both open-cell and closed-cell solutions. Spray foam insulation creates a powerful air seal that helps reduce energy costs, control moisture, strengthen structures, and maintain consistent indoor temperatures year-round.

New Construction
New Construction
New Construction
New Construction
New Construction

+28

6 neighbors recently requested a quote
Avatar for Attic Construction
Attic Construction
New to Angi
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving San Marcos, TX and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

At Attic Construction, we are driven by a single passion: improving homes through exceptional attic services. \n \nWith extensive experience in the industry, we have grown to become a trusted provider of comprehensive attic solutions across Orange County, San Diego, Dallas, and Phoenix. \n \nWe believe in delivering more than just a service; we deliver peace of mind. With a dedicated team of skilled professionals, we provide top-quality craftsmanship and personalized service tailored to each home’s unique needs. From insulation installation to rodent proofing and attic cleaning, our reliable, efficient, and affordable solutions have earned us the loyalty of countless satisfied customers.

Complete Attic Renovation
Complete Attic Renovation
Complete Attic Renovation
Complete Attic Renovation
Complete Attic Renovation

+17

10 neighbors recently requested a quote
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Insulation FAQs, answered by experts

For standard 2x4 walls, the ideal insulation has an R-value between R-13 and R-15. This level of insulation, typically around 3.5 inches thick, fits well within the wall cavity. Common options include fiberglass batts and spray foam. The best choice for your home can depend on your climate; use R-value maps, like those from Energy Star, to determine the recommended level for your region. For colder climates, you might also consider adding exterior insulation for greater efficiency. Always check with your local building codes to ensure you meet any required standards.

Upgrading insulation offers several benefits, including improved energy efficiency, which leads to lower heating and cooling costs. It also enhances indoor comfort by regulating temperature and can provide noise reduction. Additionally, better insulation has a reduced environmental impact and can increase your home's value and overall livability.

A vapor barrier keeps moisture out of the crawl space, while insulation reduces the amount of unconditioned air—and sometimes moisture—that enters the space. Coupling a vapor barrier with insulation can help prevent humidity and related moisture damage in a crawl space while also making your home more energy-efficient. Just be sure to use insulation that won’t get damaged from moisture, like rigid foam board or expanding spray foam insulation.

Minimal but regular checks can ensure maximum thermal performance.

Plaster itself has a higher R-value than drywall. However, there are other considerations surrounding plaster and insulation. As a general rule, it's easier to obtain consistency in insulating value and quality when working with drywall rather than plaster. Plaster walls often don't contain any insulation behind the wall covering by design, and careful evaluation is necessary when choosing to add it.

The San Marcos, TX homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.