
Serving Mount Hermon, CA and surrounding areas
Approved
In business since 2017
Free estimates
Offers commercial services
"They did a terrific job insulating our new home in Oakland. Great value and professional."





Serving Mount Hermon, CA and surrounding areas
Approved
In business since 2017
Free estimates
Offers commercial services
"They did a terrific job insulating our new home in Oakland. Great value and professional."




Serving Mount Hermon, CA and surrounding areas
Approved
In business since 2009
Free estimates
Small jobs welcome
"Needed to insulate my house before closing escrow, called for a quote on a Monday and they were insulating the very next day. The owner Luis Knows his stuff, very knowledgeable. Would recommend. 👍🏼👍🏼"





+5

Serving Mount Hermon, CA and surrounding areas
Approved
In business since 1975
Free estimates
Warranties offered
"Very organized customer service communication with different contacts and relationship management from estimate to job installation. Also very competitive pricing!! They make suggestions on what areas need insulation and what type of insulation is needed."





+22

Serving Mount Hermon, CA and surrounding areas
Approved
In business since 1999
Free estimates
Warranties offered
"Attic Elite is BY FAR the most professional insulation contractor. When you are looking at a major purchase (over 10k) it's good to know the contractor isn't "flying by the seat of their pants", especially when asbestos is involved."





+77

Serving Mount Hermon, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
Air Sharks delivers expert HVAC services to homeowners across the South Bay, including installation, repair, and maintenance of top brands like Daikin and Lennox. We also specialize in improving indoor air quality with professional ductwork inspection and cleaning.\n\nOwner Khaled Alsaka built Air Sharks on a passion for transforming the HVAC experience through education, collaboration, and top-tier products. We provide personalized consultations and tailored heating and cooling solutions, taking pride in our craftsmanship, attention to detail, and commitment to five-star service.





+22

Serving Mount Hermon, CA and surrounding areas
Approved
In business since 1997
Free estimates
Credit card accepted
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. With over 20 years of experience in the roofing and general construction, our roofing team can quickly identify roofing issues to repair. As with all of our services, we guarantee our work and promise to repair the issue the right way the first time, every time. We look forward to earning your business!

Serving Mount Hermon, CA and surrounding areas
In business since 2010
Free estimates
Emergency services offered
"i can only say good things about working with Attic masters. Great communication, They came on time, protected our floors and hallway from insulation dust, took pictures of the before and after for us so we can get the rebate. overall, very easy and stress free company to work with. I would definitely use again, it was a pleasure to work with true professionals."





+204

Serving Mount Hermon, CA and surrounding areas
In business since 1974
Credit card accepted
"The sales rep, Bryan, went above and beyond to answer all my zillion questions and concerns. He was responsive, knowledgeable and shared his expertise in not only insulation, but all in LED canned lights and dimmers. He was amazing and I would only ask for him again. I plan to refer others to him also in the near future. The installers were good too, letting me climb the ladder and look at the work, cleaning out the old insulation and advising me they found no termites or rodent droppings. I wish they would have vacuumed the bedroom where they brought in a lot of dirt on the carpet, and also used the shop vac in the garage afterwards, as I had to clean up afterwards, which took me an extra hour. However, overall, I was pleased."





+4

Serving Mount Hermon, CA and surrounding areas
In business since 2010
Free estimates
Credit card accepted
"We had an inspection and we had to replace the insulation in the attic. We were able to get a good deal from this company after we reached them via a referral.
The work that they did was very good and professional. there were several employees at the house for the 2 days work that they did. We do recommend this company for any insulation replacement that you may need.
"





+7

Serving Mount Hermon, CA and surrounding areas
Free estimates
Emergency services offered
Credit card accepted
"Attic efficiency and Daniel came to d for us the attic insulation replacement, the crew was very professional and clean , they add ne insulation R38 bate for our attic, we are very happy"





+13
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.
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