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TRUSTED BY SUNNYVALE, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon258
    Verified drywall insulation services reviews

Top-Rated Drywall insulation pros in Sunnyvale - Updated Nov 2026

Bay Valley Insulation Inc
4.7(
46
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"We needed retrofit wall insulation and after checking around all the listings through AngiesList, Yelp, and others, we found that only Bay Valley and SDI does retrofit wall insulation work. We went with Bay Valley because the price was reasonable and they responded quickly and promptly (can't say this about SDI*). Joel was our estimator and he came out promptly at the time and date indicated. He was thorough and thoughtful on how he approached the job, not overselling or recommending things we didn't need. We live in an older house and he appreciated the home and looked for the most non-invasive method to take care of our un-insulated exterior walls. Bay Valley's approach is to come in from the exterior walls with the typical 2-hole process (high/low) to blow in the cellulose insulation. They sent two guys in and despite a couple snags in the job, they finished the job in one full day. Afterwards, they plugged the holes, textured and primed, and the next day came in to paint (our-supplied) paint. I was really amazed how well and seamless it all looked afterwards. They did a good job cleaning and even moved the cabinets in the garage back where they originally were. The real result? The mornings have been a little bit warmer than last week, but so far the heater has barely turned on over the past couple days. The house already feels warmed and less temperature fluctuations. We already got brand-new attic insulation last Fall, but the wall insulation really did the trick. A definite recommend to anyone who needs a good team to do insulation in their home. * dealing with SDI was a nightmare, unfortunately. With *several* calls about being in the ER, then lots of other excuses, it just didn't seem like they wanted to do the job or something. I originally made the request in August and this morning on Nov 10, I got a phone call inquiring if we still needed insulation done. sigh."
Additional Photos
1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Attic Pros
Attic Pros
4.9(
233
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Sunnyvale, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Small jobs welcome

"I was looking online for insulation contractors, and found Attic Pros, Chris and his team arrived on time installed brand new attic insulation, cleaned our Crawl space and installed insulation, they took photos before and after. I am very happy with the work was completed defiantly recommend these guys."
Blow-In Attic Insulation
San Jose, CA Attic Insulation Installation
Danville, CA Vapor Barrier Installation
Mill Valley, CA Crawlspace Cleaning
Benicia, CA Attic Cleaning & Insulation

+3137

Response time12 hrs
Response rate94%
137 neighbors recently requested a quote
Avatar for Atticare Construction
Atticare Construction
4.5(
177
)
Blown-In Insulation - Install or Upgrade

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"The technician explained every step by step and the company used very good quality materials they give me a one year warranty for rodents and very good warranty for the insulation l think is a very good company l really recomended"
Before Atticare Services
After Properly Sealing the Access
After Insulation Installation
Clean and ready for Insulation Installation
After Insulation Installation

+26

Response time2 hrs
Response rate91%
29 neighbors recently requested a quote
Avatar for AtticElite Insulation Solutions
AtticElite Insulation Solutions
4.6(
27
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 1999

Free estimates

Warranties offered

"I actually had both my attic and walls insulated. Great price, on-time, efficient, clean-up and communication. Unusual from most contractors today. I would highly recommend these guys. Milo was our contact."
Get $500 Off Rodent Proofing
Get $500 off crawl space cleanup.
Get $500 off rodent proofing.
Spray Foam Insulation
Before Attic Clean Up

+77

Response time2 days
10 neighbors recently requested a quote
Recommended by73%of homeowners
Avatar for American Attics
American Attics
5.0(
8
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Sunnyvale, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"American Attic was everything they promised. Met with the owner , Sam, within a day to get a quote for removal of old insulation, rodent control and install of new insulation. He was professional and explained everything in detail of what was work was going to be done and how long it would take. We scheduled within a week at a reasonable price. His crew were neat, organized and finished on time! We were notified of some extra things that were found while they were on the job but were not pressured to have those things done. We recommend American Attic to friends or family and would definitely use them again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+52

Response time2 days
Response rate100%
9 neighbors recently requested a quote
Avatar for Ideal Attic Insulation, Inc.
Ideal Attic Insulation, Inc.
4.8(
6
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"I received several estimates from people but I chose Ideal Attic was my choice for cost and time of day when they could begin working on it which was the very next day. They explained to me what they were going to do and told me when they should be finished. I recommend them to anyone needing heating and insulation work."
Response time3 days
7 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for USAttic Insulation
USAttic Insulation
5.0(
2
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"wilson and his team arrived at 9am the early side of the window provided. He quickly started his set up began what would turn out to be a long day for his team. Provide clean out of old existing insulation, sanitized attic and sealed and prepped for attic fan and new insulation. Wilson and his team took pictures of all stages of work. Cleaned left area as if they never had been there."
Blown-In Insulation
Cleaning Air sealing
Blown-In Insulation
Blown-In Insulation
Cleaning

+3

12 neighbors recently requested a quote
Avatar for Insulation Alliance
Insulation Alliance
5.0(
2
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

"When Insulation Alliance came, they were very professional. They laid down plastic everywhere in the hallway and the bedroom. They cleaned out the whole attic. They took out the old insulation and put in the new Insulation which was R 44. They cleaned up everything and everything was clean when they left. They also sanitized the attic. You will not be disappointed that you hired."
Attic Cleaning
Attic, Crawl Space and Basement Decontamination
ATTIC, WALL, CRAWL SPACE INSULATION
THERMAL INSPECTION
REMOVING INSULATION

+86

11 neighbors recently requested a quote
Recommended by50%of homeowners
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Drywall Insulation FAQs, answered by experts

You can paint over drywall mud about 24 hours after application, but the exact timing depends on factors like humidity, temperature, and the thickness of the mud. For the best results, ensure the mud is completely dry to the touch and has changed from a darker gray to a lighter, chalky white. Don’t forget to sand and prime the drywall surface before you paint to create a smooth, even finish.

Ceiling-mounted curtains won’t damage the ceiling if they’re installed properly. Using the right anchors or securing the brackets into joists will ensure the curtain weight is properly supported and prevent damage. However, overtightening screws, using weak anchors, or repeatedly removing and reinstalling hardware in the same spot can cause cracking or sagging over time. In that case, you might have to call a pro for ceiling repair.

If you're comfortable hanging drywall yourself, you may be comfortable finishing it. But it's worth noting that finishing drywall adds several steps to the process and a lot of waiting time. Hiring a drywall installer may be the way to go if you'd rather spend your time doing other things or are nervous about leaving a rough surface.

You’ll want to inspect your plaster walls for signs of damage before painting. If you notice soft spots, deep cracks, bubbling, or areas where the plaster is crumbling or pulling away from the wall, it likely needs repair. While small hairline cracks are common and likely cosmetic, you should address larger issues before painting to ensure a quality, smooth finish.

Applying plaster to a wall will usually cost between $2 and $10 per square foot for both the material and labor. The cost will vary based on the quality of the plaster you’re using and whether or not prep work is required before the work begins. Wall prep can add up to about 10% to your total costs. Plastering exterior walls can be more expensive in many cases because they are taller and require scaffolding and safety equipment.

The Sunnyvale, CA homeowners’ guide to drywall insulation services

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