Called Sammy team for a garage conversion and they knocked it out of the park. Now I have an awesome home office that looks like it was always meant to be there. The insulation work they did keeps it comfortable year-round.

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TRUSTED BY DIAMOND BAR, CA HOMEOWNERS
4.4
Average homeowner rating120
Verified drywall insulation services reviews
Verified Reviews for Drywall Insulation pros in Diamond Bar, CA
Last update on October 11, 2025
- David H.
- Christine M.
Steven was very knowledgeable in water damage repair. He suggested we install fans to dry the damaged area He repaired the drywall and painted the various areas of our two story home.
- Julio C.
We had a great experience! Joseph was our project manager: he was always available if we had questions or concerns, and responded quickly to phone calls or texts. He stopped by almost daily during the process. We now have a beautiful insulated aluminum patio cover with lights and a fan....
- Sherie G.
We recently purchased a home that just needed a lot of love and was neglected. As a result it needed the attic cleaned out disinfected re-insulated, and new ductwork we receive several bids but 911 attic insulation provided the best bid and the best customer service and we highly recommend...
- Steve B.
Erick and his crew are OUTSTANDING. They got multiple rooms painted and finished the whole project a day early. His painters are skilled. He even found a leak that would have cost thousands of dollars of water damage. He replaced the drywall, patched the hole and left no trace of any damage...
- John C.
Very well. Very professional and mindful of your existing walls and furniture. Ran wires through attic and walls with no drywall damage. Installed Sonos speakers inside and mounted others outside. Installed Big screens on wall with pull out and swivel. Truly amazing to me. Can purchase...
- Bob T.
Richard was punctual and did an excellent job patching up my ceiling. Everything was done in a few hours and the price was very reasonable. Richard even cleaned up the mess my plumber made! I would highly recommend Southern Counties Drywall to anyone.
- Sheldon S.
The House Next Door Did My Insulation In the Attic, Foundation,Tankless Water Heater, Exterior Paint,Roofing, Reese Lights,as well my plumbing. The Workers Fast And Clean. There was a lot of communication with the contractors. I would definitely use the house next door for my future project.
Find Drywall insulation pros in Diamond Bar

Everguard Home Insulation Inc.
Everguard Home Insulation Inc.
Everguard Insulation has been a family business since 1959. Today, over 65 years and three generations later, we're proud of our contribution to the community, economy and environment. We help people save money on their utility bills while also enjoying a more comfortable home in both summer and winter. We also take pride in helping the environment and doing our part towards energy conservation and making the planet a greener place for generations to come. Additional phone numbers 818.348.1460 & 310.274.5644 - Additional DBA - Home Insulation Products. Award winning.
"We were very with the entire process! They took time to cover everything and the first and second team of workers were polite and careful in the work they performed. Aldi the clean up afterwards was excellent as well. We were super happy and would highly recommend them to anyone thinking of replacing there insulation!!"
Leo C on May 2025
Everguard Insulation has been a family business since 1959. Today, over 65 years and three generations later, we're proud of our contribution to the community, economy and environment. We help people save money on their utility bills while also enjoying a more comfortable home in both summer and winter. We also take pride in helping the environment and doing our part towards energy conservation and making the planet a greener place for generations to come. Additional phone numbers 818.348.1460 & 310.274.5644 - Additional DBA - Home Insulation Products. Award winning.
"We were very with the entire process! They took time to cover everything and the first and second team of workers were polite and careful in the work they performed. Aldi the clean up afterwards was excellent as well. We were super happy and would highly recommend them to anyone thinking of replacing there insulation!!"
Leo C on May 2025

Marathon Insulation
Marathon Insulation
Hi my name is Jonathan owner of Marathon Insulation. I started working for a reputable company 13 years ago, just this year I decided to start my own business. I have all the knowledge and hands on experience to answer any of your insulation questions.
"Great very pleased"
Betsy W on December 2023
Hi my name is Jonathan owner of Marathon Insulation. I started working for a reputable company 13 years ago, just this year I decided to start my own business. I have all the knowledge and hands on experience to answer any of your insulation questions.
"Great very pleased"
Betsy W on December 2023

Insulation Nation, LLC
Insulation Nation, LLC
Hi there from Dustin, owner of Insulation Nation! Here in So Cal, we join our Colorado office in providing personalized high touch experiences for our customers. I work with our customers directly every step of the way from evaluation, education and review of options, through the project and to inspection of the results. We've never seen less than a 5 star review. Small businesses live and die by reviews and we are ready to earn 5 stars on your project! Thank you! C-02 Insulation and Acoustic #: 1127373 EXP: 10/31/2026
"We had Insulation Nation (Dustin) come to our house to look at our attis insulation; our house was built in the late 70's and I had added more blown-in insulation many years ago. We decided on adding 8" of blown-in insulation to reduce our heating/cooling cost and to reduce the cycling of our HVAC system. They did a wonderful job of sealing any attic leaks, covers for our canned lighting fixtures, built a dam around our whole house fan, added baffles around our soffits, and added the insulation. Nicely done and a professional job. Would recommend using their service."
Robert S on February 2025
Hi there from Dustin, owner of Insulation Nation! Here in So Cal, we join our Colorado office in providing personalized high touch experiences for our customers. I work with our customers directly every step of the way from evaluation, education and review of options, through the project and to inspection of the results. We've never seen less than a 5 star review. Small businesses live and die by reviews and we are ready to earn 5 stars on your project! Thank you! C-02 Insulation and Acoustic #: 1127373 EXP: 10/31/2026
"We had Insulation Nation (Dustin) come to our house to look at our attis insulation; our house was built in the late 70's and I had added more blown-in insulation many years ago. We decided on adding 8" of blown-in insulation to reduce our heating/cooling cost and to reduce the cycling of our HVAC system. They did a wonderful job of sealing any attic leaks, covers for our canned lighting fixtures, built a dam around our whole house fan, added baffles around our soffits, and added the insulation. Nicely done and a professional job. Would recommend using their service."
Robert S on February 2025

Insulation Labs
Insulation Labs
Attic & Crawlspace & Solar Energy Specialists. The Insulation Labs team has unmatched customer service and attic/solar experience. Pooling years of knowledge and expertise together in order to provide you with the best service possible. Our team is friendly and helpful, explaining any jargon to you in a concise and understandable manner. It is important to work with a team that has a good reputation in your local community; Insulation Labs is known for its affordability, professionalism, and world-class customer service in the greater Los Angeles area. We have earned a reputation as one of the top attic cleaning and insulation replacement services in greater Los Angeles, continually furthering our stellar reputation and customer satisfaction. We provide our customers with home solutions that are tailored to them, allowing them to improve their attics, crawl spaces, and their home's energy efficiency in no time!
"The guys were really neat. They set up a tunnel from the attic to the back door. There really wasn't much to clean up after. They vacuumed out the old insullation and laid in new. It's hard to say if they did a good job in the attic, because I don’t know what its supposed to look like. They were in the attic almost about 7 hours. The only issue was that they said the senior discount on their Angie's list page must be old so they didn't honor it."
Pamela D on November 2024
Attic & Crawlspace & Solar Energy Specialists. The Insulation Labs team has unmatched customer service and attic/solar experience. Pooling years of knowledge and expertise together in order to provide you with the best service possible. Our team is friendly and helpful, explaining any jargon to you in a concise and understandable manner. It is important to work with a team that has a good reputation in your local community; Insulation Labs is known for its affordability, professionalism, and world-class customer service in the greater Los Angeles area. We have earned a reputation as one of the top attic cleaning and insulation replacement services in greater Los Angeles, continually furthering our stellar reputation and customer satisfaction. We provide our customers with home solutions that are tailored to them, allowing them to improve their attics, crawl spaces, and their home's energy efficiency in no time!
"The guys were really neat. They set up a tunnel from the attic to the back door. There really wasn't much to clean up after. They vacuumed out the old insullation and laid in new. It's hard to say if they did a good job in the attic, because I don’t know what its supposed to look like. They were in the attic almost about 7 hours. The only issue was that they said the senior discount on their Angie's list page must be old so they didn't honor it."
Pamela D on November 2024

Thor McAndrew Construction
Thor McAndrew Construction
Thor McAndrew Construction is a family owned and operated business since 1998. We pride ourselves in providing prompt and couteous service to all of our customers. We are licensed and insured and provide free estimates.
"They were very knowledgeable, quick and courteous."
Marilyn H on June 2025
Thor McAndrew Construction is a family owned and operated business since 1998. We pride ourselves in providing prompt and couteous service to all of our customers. We are licensed and insured and provide free estimates.
"They were very knowledgeable, quick and courteous."
Marilyn H on June 2025
Lee's Drywall Repair
Lee's Drywall Repair
Fully licensed and bonded. Owner does all the work by himself and has more than 25 years experience. Award winning. Specializing in Drywall and Stucco Repair and matching textures.
"Showed up on time, completed the repairs quickly and efficiently, and didn't leave any mess."
Thomas S on May 2025
Fully licensed and bonded. Owner does all the work by himself and has more than 25 years experience. Award winning. Specializing in Drywall and Stucco Repair and matching textures.
"Showed up on time, completed the repairs quickly and efficiently, and didn't leave any mess."
Thomas S on May 2025

Caliber Drywall
Caliber Drywall
We are locally owned and operated company serving the Inland Empire, Orange County, and some parts of L.A county CA and surrounding communities. Caliber Drywall offers quality workmanship, with reasonable rates and friendly customer service to all of our clients. For your next drywall project, installation or repair, call Caliber Drywall. We are fully licensed and insured. Call us now!
"Ken was great and professional. His team got the job done the way I imagined. He kept me updated throughout construction. My ceiling has never looked better. "
Matias F on September 2025
We are locally owned and operated company serving the Inland Empire, Orange County, and some parts of L.A county CA and surrounding communities. Caliber Drywall offers quality workmanship, with reasonable rates and friendly customer service to all of our clients. For your next drywall project, installation or repair, call Caliber Drywall. We are fully licensed and insured. Call us now!
"Ken was great and professional. His team got the job done the way I imagined. He kept me updated throughout construction. My ceiling has never looked better. "
Matias F on September 2025

A J M Construction
A J M Construction
Welcome to A J M Construction! Proudly servicing Los Angeles and the surrounding areas. We take great pride in our professionalism and customer satisfaction. We specialize in all your drywall needs and no job is too big or too small for us. For fast, reliable, and efficient service give us a call today.
"Arturo was very responsive and easy to communicate with. He provided updates and finished right on schedule with the timeline he provided. He and Oscar did great work and left the areas they worked on very clean. We added on an extra project at the end and Arturo found a way to get it done for us before we moved into the house. Highly recommend Arturo and his team. "
Elisabeth H on September 2025
Welcome to A J M Construction! Proudly servicing Los Angeles and the surrounding areas. We take great pride in our professionalism and customer satisfaction. We specialize in all your drywall needs and no job is too big or too small for us. For fast, reliable, and efficient service give us a call today.
"Arturo was very responsive and easy to communicate with. He provided updates and finished right on schedule with the timeline he provided. He and Oscar did great work and left the areas they worked on very clean. We added on an extra project at the end and Arturo found a way to get it done for us before we moved into the house. Highly recommend Arturo and his team. "
Elisabeth H on September 2025
Neri The Painter
Neri The Painter
We strive to provide great quality work with honesty and professionalism. We believe in 100% customer satisfaction. We specialize in interior & exterior paint finishes such as cabinet resurfacing, wall painting, stains, drywall and stucco repair. We believe on in person consults so that you always know your talking to someone real and that helps us build a relationship. Lastly, we want to make sure you feel comfortable if you may have any questions that will be there to answer them.
We strive to provide great quality work with honesty and professionalism. We believe in 100% customer satisfaction. We specialize in interior & exterior paint finishes such as cabinet resurfacing, wall painting, stains, drywall and stucco repair. We believe on in person consults so that you always know your talking to someone real and that helps us build a relationship. Lastly, we want to make sure you feel comfortable if you may have any questions that will be there to answer them.
Torval General Construction
Torval General Construction
General contractor residental work. We specialize in the following : flooring, tile, carpet, vinyl, wood. Room additions, windows, doors, walls. Concrete, backyard, driveway. Restroom and kitchen upgrade No job is too small call for a quote, best quality job around the ie guarantee over 20 years experience. Dont let it pass, stop thinking about it get that addition or upgrade you and your family deserve, book me for a quote got the best reasonable prices around.
General contractor residental work. We specialize in the following : flooring, tile, carpet, vinyl, wood. Room additions, windows, doors, walls. Concrete, backyard, driveway. Restroom and kitchen upgrade No job is too small call for a quote, best quality job around the ie guarantee over 20 years experience. Dont let it pass, stop thinking about it get that addition or upgrade you and your family deserve, book me for a quote got the best reasonable prices around.
FAQs for drywall insulation projects in Diamond Bar, CA
On average, drywall installation costs $2,000, depending on the size, complexity, accessibility, and location of the job. The typical cost range is from about $400 to $6,000, which includes materials and labor. Additional cost factors include the thickness of the drywall, the shape and height of the room, and the level of finish. The level of finish ranges from only hanging the drywall to taping and mudding the seams between panels to painting the walls.
The best type of insulation for your home depends on what you need, so the answer will depend on your specific situation. If you’re building a house, structural panels are easy to install during the building process in addition to being the most energy efficient type. If you live in a warm climate, reflective insulation may benefit you more as it costs less than other insulation types. And for standard attics, loose-fill, spray foam, or blown-in insulation work well.
If you plan to heat or cool your garage, you’ll need to insulate the garage ceiling. Insulating your garage ceiling will make your garage much more energy efficient and save on heating and cooling costs. Not only does insulation make your garage more energy efficient, it helps reduce noise and can extend the life of your garage roof. You can use fiberglass, cellulose, mineral wool, or spray foam insulation for this project.
The cost to skim coat drywall is $1.15 to $1.35 per square foot. Most of the cost is labor, for the necessary skills to apply the skim coat with precision using high-quality tools. This is a job better left to the professionals for the best outcomes.
On average, insulating an attic costs about $2,500, ranging from $1,500 to $3,500, depending on the insulation type, amount, and your attic’s accessibility. Additional cost factors include sealing air leaks, removal or replacement of insulation, and inspections. Types of insulation include:
Blown-in: $1–$4 per square foot
Spray foam: $2–$5 per square foot
Batt: $2–$4 per square foot
Structural insulated panels: $4–$7 per square foot
Loose-fill: $2–$5 per square foot
Reflective: $0.50–$1.50 per square foot
The Diamond Bar, CA homeowners’ guide to drywall insulation services
From average costs to expert advice, get all the answers you need to get your job done.
Drywall texture can create an attractive finish and add dimension to your home’s walls. This guide breaks down the factors that influence the cost to texture drywall.
The average TV mount installation cost typically falls between $157 and $359, depending on your wall type, and the size, weight, and mount type of your TV.
Whether you’re trying to keep noise in or out, soundproofing materials are the way to go. Use this guide to see how much it costs to soundproof a room.
Hanging drywall on a ceiling can be a tough project because the drywall is heavy, and you must lift it over head. Use this guide to learn how to hang drywall on a ceiling the right way.
Learning how to sand drywall and drywall mud requires using one of a few different techniques. Use our guide to learn more about your options.
Hanging and finishing drywall can be hard work if you don’t have experience. These professional-level drywall mudding tips make the project easier.
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