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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 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%
18 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
Spray Foam Insulation - InstallBlown-In Insulation - Install or UpgradeBatt, 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

7 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

Rigid foam board insulation is one of the safest insulation materials for basement walls. The panels offer a moisture barrier to prevent mold and mildew build-up. At the same time, this material is also fire-resistant, so you don’t have to worry as much about a fire breaking out as you would with spray foam insulation. 

The most energy-efficient windows are double—or triple-pane windows with low-emissivity (Low-E) coatings and gas fills between the panes. These windows reduce heat transfer, prevent drafts, and help maintain a consistent indoor temperature. But if replacing windows isn’t in your budget, pairing your existing windows with insulating window treatments can still make a noticeable difference in home comfort and monthly bills. 

If you’re moving wires, installing new wires, or installing new fixtures in the space you’re insulating, then you will need to hire a licensed electrician to do that portion of the job for you. However, if you just intend on replacing old insulation or adding new insulation over existing insulation, then you don’t need to hire one. Your insulation installer will work around wiring, fixtures, outlets, and switches, even if they’re installing fiberglass batts in the voids where wires run. However, you will need an electrician if you suspect a problem with your wiring during the insulation work.

When looking for a company who installs insulation, your best bet is usually to work with an insulation contractor or professional insulation company. If you can't find a local insulation company, working with a general contractor can be another option. No matter who you hire, always confirm that they have experience.

Yes, energy-efficient homes are increasingly desirable in the market.

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.