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TRUSTED BY SAN MARCOS, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon89
    Verified insulation services reviews

Verified Reviews for Insulation Service pros in San Marcos, CA

*The Angi rating for Insulation Service companies in San Marcos, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

*The HomeAdvisor rating for Insulation Service companies in San Marcos, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

Last update on September 17, 2026

Find Insulation pros in San Marcos

Avatar for Insulation Commandos of Temecula Valley and North San Diego
Insulation Commandos of Temecula Valley and North San Diego
5.0(
14
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving San Marcos, CA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"The owner of the company Jason Taylor spent time in my attic before we contracted with them so he could give me good and correct information. He also participated in the work of shooting in the insulation. He was very hands-on. Donâ t usually expect this attention from the owner/boss Was very pleased."
Blow In Fiberglass
Attic Cleaning
Before
Insulation Commandos
On Jobsite

+3

Response time11 hrs
Response rate100%
23 neighbors recently requested a quote
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Avatar for ACH Insulation
ACH Insulation
4.6(
47
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving San Marcos, CA and surrounding areas

Approved

In business since 1991

Free estimates

Warranties offered

"Great company to work with. Very professional and courteous. They did a great job insulating my home and you canâ t tell where the work was done. They weâ re respectful of my property, worked fast & efficiently and cleaned everything up when completed. I highly recommend this company!"
Stage 1
Stage 2
Stage 3
Stage 4
Stage 5

+15

Response time11 hrs
10 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Attic Shield
Attic Shield
5.0(
20
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving San Marcos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Small jobs welcome

"Explained what was needed to be done. Arrived on time. Fast and efficient. removed all old insulation in attic-, sanitized and installed new insulation."
Batts Insulation
Final Install
Final Installation
Air Sealing
Cleaning

+17

Response time8 hrs
Response rate93%
7 neighbors recently requested a quote
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Avatar for Ecotech Pro Inc
Ecotech Pro Inc
5.0(
17
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving San Marcos, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Yes. Billy said everyone was great on install date. Omar was helpful and communicated effectively. Team worked well together and were efficient. Team was respectful of our property and cleaned up after work done. All of the team members being available was excellent to get install in one day. We hopefully will enjoy the benefits of the insulation and all went as anticipated with install. Very glad we had it done. Leo was excellent with pre install quote and arranging for install. We got a few quotes . We paid highest quote to have the work done quickly which met our needs. Thank you for the excellent service"
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
New Attic blow-in insulation.
Heating and Air Conditioning Project

+55

Response time1 day
Response rate100%
26 neighbors recently requested a quote
Request Quote
Avatar for California Attic & Build Corp.
California Attic & Build Corp.
4.6(
19
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving San Marcos, CA and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"California Attic & Build was fantastic! The team was professional on time and left everything spotless. They explained the process clearly and showed before and after photos. My home already feels more comfortable. Highly recommended for insulation, cleanup, and rodent proofing!"
My jobs
My jobs
My jobs
My jobs
Response time1 day
Response rate96%
148 neighbors recently requested a quote
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Avatar for Phoenix Insulation Inc.
Phoenix Insulation Inc.
5.0(
1
)
Spray Foam Insulation - Install

Serving San Marcos, CA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I was very satisfied on efficiency these guys were working on my home ! Making my home feel like home again ! I’ll recommend them again 🫶and very affordable btw! thanks to them it saved me a lot of money ! Phoenix insulation is the best ! Thank you !"
Gallery
8 neighbors recently requested a quote
Request Quote
Avatar for Pro Service Insulation, Inc.
Pro Service Insulation, Inc.
4.9(
44
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving San Marcos, CA and surrounding areas

In business since 2017

Free estimates

Warranties offered

"Robert was able to come a day sooner to do my estimate. He was very friendly and knowledgeable and gave us an estimate we can work with. We hope to hire him soon to do the work of insulating our attic."
Blown Fiberglass
Blown Fiberglass
Blown Fiberglass
Blown Fiberglass
Blown Fiberglass

+40

Response time12 hrs
Recommended by100%of homeowners
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Avatar for Guardian Insulation, Inc.
Guardian Insulation, Inc.
4.7(
63
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving San Marcos, CA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"The guys did a great job, cleaning up the old insulation and then reinstalling new insulation. They were professional and cleaned up after. I would recommend them."
Blown Cellulose
Installing Cellulsoe Insulation
Air Sealing Attic Penetrations
Exterior Wall Insulation
Exterior Wall Insulation Patching

+1

Response time1 day
Response rate93%
Recommended by96%of homeowners
Request Quote
Avatar for Guardian Home Energy
Guardian Home Energy
4.2(
111
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving San Marcos, CA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"Insulation is wonderful any dog barking sounds like it's down very long tunnel."
Blown Attic Insulation
Fair Market Value
Response time1 day
Recommended by91%of homeowners
Request Quote
Showing 1-10 of 45
Insulation questions, answered by experts

For San Marcos homes, blown-in cellulose and radiant barriers are excellent for attic insulation, offering improved energy efficiency in the local climate. Mineral wool and injection foam perform well in walls, especially where fire resistance and moisture control matter. Use rigid foam boards for slab edges and R-8 insulation for ducts in unconditioned spaces. Prioritize materials that resist moisture, enhance cooling, and meet CA’s fire safety standards.

Helpful?

In San Marcos, if you notice persistent hot or cold spots, high energy bills, or musty odors, your insulation may need attention. Look for visible gaps, compressed or missing insulation, or signs of moisture like ceiling stains. Outdated materials, exposed ductwork, or insulation disturbed by seismic activity or recent HVAC upgrades are also indicators that your home’s insulation service project should be reassessed for better comfort and energy efficiency.

Helpful?

In San Marcos, you can address small insulation issues by sealing minor air leaks with caulk or foam, updating weatherstripping, and ensuring attic hatches are insulated. Wear gloves, a mask, and protective clothing, especially in attics or crawl spaces. Avoid working during peak heat or handling electrical components. If you discover moisture, pest damage, or large uninsulated areas, it’s best to contact a local insulation professional.

Helpful?

In San Marcos, insulation service projects can be more complex in homes with tight attic spaces, low-slope roofs, or multi-level layouts common in hillside neighborhoods. Stucco exteriors may hide moisture issues, while concrete slab foundations can limit access for underfloor insulation. Watch for older additions, unpermitted renovations, or homes with multiple HVAC zones, as these often require specialized planning for optimal energy efficiency and air sealing.

Helpful?

In San Marcos, insulation service projects often reveal hidden needs like moisture remediation, pest removal, or electrical upgrades, especially in older homes. Additional costs can arise from permit requirements, energy efficiency upgrades, or labor challenges due to hillside construction and limited driveway access. Fire-resistant material requirements and disposal of outdated insulation are also common, particularly in CA’s climate where wildfire safety and energy compliance are priorities.

Helpful?

The San Marcos, CA homeowners’ guide to insulation services

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

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