Serving Windsor, CA and surrounding areas
Approved
In business since 2018
Free estimates
Customers say: Quick response
"Great communication and very excellent customer service highly recommended!"
Serving Windsor, CA and surrounding areas
Approved
In business since 2008
Free estimates
Warranties offered
"The crew arrived on time and installed plastic on the floor and walls for protection. They did a good job removing the old insulation and installing new insulation. The crew did a great job cleaning up. Nice professional job."
+26
Serving Windsor, CA and surrounding areas
Approved
In business since 1975
Free estimates
Warranties offered
"Joe Stromberg, project manager, is an excellent asset of the company!!! I was also lucky to have two skillful workers who performed the project. I will definitely recommend SDI Insulation if asked to. Luba"
+22
Serving Windsor, CA and surrounding areas
Approved (Corporate)
In business since 1950
Free estimates
Credit card accepted
"They get back to me immediately with a quote and were very informative about the recommendations for the insulation that I needed and would best suit my needs. They did the job quickly and efficiently and I really appreciate their courteous prompt service"
Serving Windsor, CA and surrounding areas
Approved
In business since 2011
Free estimates
Credit card accepted
"Ace was the lowest price and used the best insulation material which was fiberglass not cellulose. They showed up when expected and did a good job, we know, my husband was a building inspector before he retired."
Serving Windsor, CA and surrounding areas
In business since 2020
Free estimates
Credit card accepted
"Tempest insulation with Fernando are going to be my go to team for any future insulation needs. I used tempest for a R44 blown in insulation. Fernando was on time for the estimate, sent me a follow up with responses to all my questions and began the work at 8 am on the dot! He and his crew were timely, professional, clean and were in and out of my place in less than a day and cleaned up everything after themselves. I would highly recommend them!"
+8
Serving Windsor, CA and surrounding areas
In business since 1983
Free estimates
Warranties offered
"They came out to look and suggested that this was not an insulation problem, but a problem with the duct work for the A/C. They had recommended one of their A/C subcontractors who did an excellent job."
Serving Windsor, CA and surrounding areas
In business since 2015
Free estimates
Warranties offered
"Professional service in estimating. Thorough and skilled insulation."
+156
Serving Windsor, CA and surrounding areas
In business since 2016
Free estimates
Credit card accepted
"They did it great. They were personable, they showed up, they did very well and they set it up for me the air duct system and they didn't charged me for that. The work and their price was awesome."
+18
Serving Windsor, CA and surrounding areas
In business since 2003
Free estimates
"The project was to insulate the home (1800 sq. ft) --blown in R38 for the attic and 6 inch BATTS (R-19) for the basement/subfloor to protect our newly installed hardwood floors and to provide insulation in general. Every aspect of the process from initial consult call to bidding to project completion was superb. Craig provided excellent customer service. He understood our objective was to get the most value for our investment. He showed up on time and performed the project professionally and seamlessly. I highly recommend this contractor for insulation services."
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.
From average costs to expert advice, get all the answers you need to get your job done.
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