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Find Insulation pros in Descanso

Avatar for Attic Shield
Attic Shield
4.9(
19
)

Serving Descanso, 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 rate89%
5 neighbors recently requested a quote
Avatar for Attic Professional
Attic Professional
5.0(
8
)

Serving Descanso, CA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"Great quality work, paid attention to every detail; from laying down plastic to corner guards to cleaning up every last piece of insulation on the ground outside. The owner and his crew, who were his father and family friends were very professional and kind. The best owner and operator business that I would recommend to the next person in line."
Response time1 day
15 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for California Attic & Build Corp.
California Attic & Build Corp.
4.7(
14
)

Serving Descanso, 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 rate94%
88 neighbors recently requested a quote
Avatar for Attic Construction, Inc.
Attic Construction, Inc.
4.3(
82
)

Serving Descanso, CA and surrounding areas

In business since 2013

Free estimates

Credit card accepted

"Technician Jake Sheiner came out for free inspection and estimate. Explained with the amount of blown-in insulation we already have that adding more would not net any energy savings. He was honest, polite and knowledgeable and did not try to see us something we did not need. He cleaned up after inspecting both attics and explained everything he found to us. Thanks, Jake."
Before, Middle, After
Before
Removing Debris and Batt Insulation
During Vacuuming
During Vacuuming

+9

Response time4 hrs
Response rate85%
Recommended by90%of homeowners
Avatar for Landmark Energy Upgrades
Landmark Energy Upgrades
4.8(
59
)

Serving Descanso, CA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"We have a 1970's and we decided to have an energy audit by Landmark Construction. It was clear that our house have some energy issues and was in need of a any type of energy overhaul.  The report that was prepared for us by Charlie and his office staff, was comprehensive, clear to understand and revealed that the ducts at the attic  was not sized appropriately. In addition to that, the furnace/AC in the smaller unit was old (and original) and had to be replaced. The recommendations that Charlie told us, included a new furnace/AC, new tankless water system, hot water pipe insulation, building sealing, the insulation and new ducting throughout the house. This was the best investment we ever made.  I could not believe the difference in our utilities bill.  Charlie and his team were great,  professional and experienced. I wish we did these 15 years ago!!
"
Cool Roof Install
Energy Upgrade
HVAC Air Duct
Home Energy Audit
Energy Upgrade Contractors

+6

Recommended by98%of homeowners
Avatar for Mega Power Electric, Inc
Mega Power Electric, Inc
5.0(
191
)

Serving Descanso, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Excellent Service from planning through Execution and installation to final fine tuning. The folks communicated well and explained every detail of the step. Got permit and inspection done. It was seamless. Thanks. R."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+32

Recommended by100%of homeowners
Avatar for Hometown National
Hometown National
5.0(
151
)

Serving Descanso, CA and surrounding areas

In business since 2018

Free estimates

Emergency services offered

"I was not in my apartment for the last month, and after returning, I discovered a severe water leakage. It was a bad situation, but the hometown restoration responded to me quickly. I was anxious as we managed everything over the phone, but they guided me through the entire matter with photographs and facetime. They were attentive and knowledgeable. I eventually learned to trust the expert team of hometown restoration. They quickly cleaned up the water and removed all of the damaged sections. They were trustworthy and efficient. They also helped me take pictures for my insurance company, making it simple to claim. It was a difficult circumstance, but hometown restoration took excellent care of me. I recommend them, but I hope I never need to contact them again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+3

Recommended by100%of homeowners
Avatar for Just Do It Builders Inc
Just Do It Builders Inc
4.4(
215
)

Serving Descanso, CA and surrounding areas

In business since 1991

Free estimates

Credit card accepted

"I bought an Angie's list deal for dry wall repair but really they just spread some spackle on it and left it rough. I had to scrape off the blobs of spackle left on the ceiling. My boyfriend could have done the same job. I wanted them to actually replace the dry wall where it was cracking. Mainly they wanted to sell me more jobs and pushed me to sign on with them to get new insulation in the attic. I had them give me an estimate on rain gutters while they were here. Their estimate/prices are very high. I think they have to pay for all those people manning the phones. It sounds like a boiler room when they call."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+29

Recommended by70%of homeowners
Showing 1-10 of 24

FAQs for insulation service projects in Descanso, CA

Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.

R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.

Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.

You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.

Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.

The Descanso, 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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