Attic & wall insulation
Blown and spray insulation that fills wall cavities, roof decks and attic floors. Each job is documented on an insulation statement with the R-value, bag count and square footage.
R-38 · R-49
Weatherization & insulation · Serving all of Texas
Fill every gap. Keep the energy in.
First Energy Source LLC insulates attics and walls and weatherizes homes and apartments across Texas, working with utility energy-efficiency programs.
Scroll to insulate
Sealed. Insulated. Pure energy.
Install progress0%
- Wall cavitiesSpray
- Roof deckSeal
- Attic floorR-38 / R-49
- Works with 5 Texas utility programs
- Serving all of Texas
- Every job documented with an insulation statement
- R-38 & R-49 attic insulation
- Based in Houston, TX
- Insulation · weatherization · LEDs · shower heads · weatherstripping · door sweeps
About us
We make Texas homes cheaper to cool and heat by stopping the air leaks and heat gain that Texas summers punish, working hand in hand with utility energy-efficiency programs.
First Energy Source is led by CEO Gianmarco López, who brings over 24 years of experience in residential energy efficiency programs, combining project management and field operations. He specializes in planning, execution and quality control, team supervision, process optimization, and compliance with the standards required by utilities and public programs in multiple states. That experience shapes how our crews work on every job, from the first walkthrough to the final insulation statement.
Based inHouston, TX
ServingAll of Texas
Attic targetsR-38 · R-49
Utility programs5 partners
What we install
Services
Insulation is the big one, and the small fixes add up too. One visit can cover the attic, the doors and the fixtures that waste energy every day.
Weatherization
We find where cooled and heated air escapes and close it off, so the AC and heater run less to keep the house comfortable.
LED light bulbs
We replace old incandescent bulbs with LEDs that use far less electricity and last for years.
Low-flow shower heads
Efficient shower heads use less hot water, which lowers both the water bill and the energy spent heating it.
Weatherstripping
Seals around doors and windows that stop drafts, dust and humid outdoor air from getting in.
Door sweeps
A sweep along the bottom of each exterior door closes the gap you can see daylight through.
Utility energy-efficiency programs
We work with your utility
We install insulation and weatherization through programs run by these electric utilities. Tell us who provides your power and we'll check what applies to your property.
- Xcel Energy
Service area: All of Texas, based in Houston
Program availability and eligibility are set by each utility and can change. We'll confirm the details for your address before any work starts.
How a job works
From call to done
Property managers and homeowners get the same process, whether it's one house or a full apartment community.
Reach out
Send the form below or call. Tell us the address and your utility company.
Walkthrough
We look at the attic, doors and fixtures and confirm which program and measures apply.
Install
Our crew installs the insulation and weatherization measures and checks the work inside the home.
Paperwork
You get an insulation statement showing the R-value, the bags used and the square feet covered.
Leave us a review
Worked with us? Tell your neighbors how it went.
Your review helps other Texas families find a crew they can trust. It takes about a minute.
Who you'll talk to
Our team
Call or email the person you need directly. For anything else, write to our main inbox.
Gianmarco López
CEO · Owner & Director
Carlo Ramirez
General Manager
First Energy Source
Main office
Request an assessment
Let's look at your property
Leave your details and our office will get back to you about scheduling and which utility program fits.
Prefer to call?469-885-5131