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Top-Rated Spray foam insulation pros in Gualala - Updated Nov 2026

Avatar for Redwood Insulation
Redwood Insulation
4.9(
16
)

Serving Gualala, CA and surrounding areas

Approved

In business since 2018

Free estimates

Customers say: Quick response

"Matt completed the insulation of my crawl space with spray foam quickly and at a very competitive cost. I highly recommend Redwood Insulation without reservation."
Response time2 days
9 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Coast Building Products
Coast Building Products
4.5(
14
)

Serving Gualala, CA and surrounding areas

Approved (Corporate)

In business since 1950

Free estimates

Credit card accepted

"Cruz helped us understand our options and visited twice to finalize the scope of work. Insulation team was punctual and provided expert craftsmanship. Glad I chose Coast."
Spary foam rooof line
Batt installatoin
Applying Spray Fiam
Response time8 hrs
Response rate100%
28 neighbors recently requested a quote
Avatar for Apperson Energy Management
Apperson Energy Management
4.7(
56
)

Serving Gualala, CA and surrounding areas

In business since 1983

Free estimates

Warranties offered

"Sergio the estimator arrived on time was exceptionally thorough. I was only looking for attic insulation, but Sergio asked if I had insulation in my walls. I assumed I did, he checked I did not, as I have an older home. Jon was wonderful answering my questions and calls. Luis and Jose arrived on time they did a fabulous job insulating my attic and walls and were very neat and clean I needed some help clearing some shelves in the garage for wall insulation and Jon sent his son Connor help me. I highly recommend them"
Recommended by100%of homeowners
Avatar for Landmark Energy Upgrades
Landmark Energy Upgrades
4.8(
59
)
Insulation - Install or Upgrade

Serving Gualala, CA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"Last week I had Landmark energy upgrades, do energy efficiency work at my home. The work included sealing all my duct-work in the attic as well as sealing all the spots between the living space below and blowing in additional insulation in order to bring me up to today's standards. I also had them replace all the duct work in my crawlspace and seal it as well as when they came for their initial inspection they found that my duct-work was riddled with holes and was completely uninsulated as well as being unsealed. I initially contacted Landmark after receiving notification that they were offering assorted rebates for home owners to incentivize them to do upgrades to there homes.
I was super pleased with these guys, a total of two crews worked on our home and they were both quick, professional, and explained what they would be doing in detail when they first arrived. They also did a good job cleaning up after themselves. Immediately I noticed a difference in my home after the work was finished. The HVAC system weren?t running nearly as much and the temperature in the home was absolutely more consistent.  Landmark Energy Upgrades promptly handled all the paperwork required in order for me to receive my rebates making this part of the process extremely easy. I fully recommend these guys!
"
Cool Roof Install
Energy Upgrade
HVAC Air Duct
Home Energy Audit
Energy Upgrade Contractors

+6

Recommended by98%of homeowners
Honest Handyman
4.6(
89
)
Insulation - Install or Upgrade

Serving Gualala, CA and surrounding areas

Free estimates

Emergency services offered

"Joshua is great! I purchased the toilets at Home Depot and arranged for Joshua to pick them up. Well HD Lancaster location only had two of the HE toilets that I wanted, so the 3rd toilet was picked up in the HD Palmdale store. Joshua did all this with pleasure. He was on time, work was completed superbly and cleanup was on point. I will always call on Joshua for my Handyman needs..."
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Recommended by96%of homeowners
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FAQs for spray foam insulation projects in Gualala, 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.