Get matched with top insulation pros in Knoxville, MD
There are 24 highly-rated local insulation pros.
Matching on Angi
TRUSTED BY HOMEOWNERS
4.4 
220 Verified Reviews for Insulation Service pros in Knoxville, MD
*The Angi rating for Insulation Service companies in Knoxville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
*The HomeAdvisor rating for Insulation Service companies in Knoxville, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
Last update on April 10, 2025
Insulation pros in Knoxville
USA Home Performance is a BPI-certified company passionate about transforming your home into a healthier, more comfortable, and energy-efficient space. We specialize in indoor air quality testing and solutions, alongside expert insulation services, spray foam applications, crawlspace encapsulations, and waterproofing. Our dedicated team prioritizes clean, safe air for your family, addressing pollutants and inefficiencies to create a living environment that promotes well-being while reducing energy costs.
"It was fine. They were prompt and gave me an estimate on the spot when they did the inspection. They came the next week or several days after and put in everything. I'll give them 5 stars but they never get back to me until now. It depends if depends if I'm going to use them again if they get back at me and answer all the questions that I have."
sharlene d on May 2021
USA Home Performance is a BPI-certified company passionate about transforming your home into a healthier, more comfortable, and energy-efficient space. We specialize in indoor air quality testing and solutions, alongside expert insulation services, spray foam applications, crawlspace encapsulations, and waterproofing. Our dedicated team prioritizes clean, safe air for your family, addressing pollutants and inefficiencies to create a living environment that promotes well-being while reducing energy costs.
"It was fine. They were prompt and gave me an estimate on the spot when they did the inspection. They came the next week or several days after and put in everything. I'll give them 5 stars but they never get back to me until now. It depends if depends if I'm going to use them again if they get back at me and answer all the questions that I have."
sharlene d on May 2021
Atlas Home Energy Solutions is committed to providing the highest quality home energy improvements to homeowners interested in reducing their utility bills and improving the comfort of their home year round. Customer Satisfaction is our number one priority and we promise that we can make a real impact in your home in a way that keeps you happy every step of the way.
"Atlas home energy solutions did an outstanding job from start to finish. They were professional, knowledgeable, courteous and easy to work with. All the crew members Ben Mott (was very knowledgeable, did the home energy audit, followed up with competitive quotes, which was adjusted to accommodate my request, offered BGE rebates upfront, patient and friendly to attend my calls and answer all the questions), Zam (Crew leader who did the exhaust fan installation), Tun (Crew leader who did an outstanding job to insulate the attic and basement), David (Crew leader who did duct cleaning and Aeroseal) were phenomenal and did an outstanding job. The end result is a day and night difference before and after the work and my BGE bill last month went down by more than $100 which is a huge cost saver. The HVAC does not run that much these days and the temperature is pretty even across the 30-year townhouse. I highly recommend Atlas home energy solutions for home energy audit and improvements."
Chandra V on April 2024
Atlas Home Energy Solutions is committed to providing the highest quality home energy improvements to homeowners interested in reducing their utility bills and improving the comfort of their home year round. Customer Satisfaction is our number one priority and we promise that we can make a real impact in your home in a way that keeps you happy every step of the way.
"Atlas home energy solutions did an outstanding job from start to finish. They were professional, knowledgeable, courteous and easy to work with. All the crew members Ben Mott (was very knowledgeable, did the home energy audit, followed up with competitive quotes, which was adjusted to accommodate my request, offered BGE rebates upfront, patient and friendly to attend my calls and answer all the questions), Zam (Crew leader who did the exhaust fan installation), Tun (Crew leader who did an outstanding job to insulate the attic and basement), David (Crew leader who did duct cleaning and Aeroseal) were phenomenal and did an outstanding job. The end result is a day and night difference before and after the work and my BGE bill last month went down by more than $100 which is a huge cost saver. The HVAC does not run that much these days and the temperature is pretty even across the 30-year townhouse. I highly recommend Atlas home energy solutions for home energy audit and improvements."
Chandra V on April 2024
At Metstar Premier Era Innovations, we’re passionate about turning dreams into reality. We specialize in crafting both residential and commercial spaces in Maryland, DC and Northern Virginia with unwavering attention to detail. Our values of integrity, innovation, and collaboration drive every project we undertake. We listen, create, and build all while prioritizing your vision and aspirations. Trust us to bring excellence and quality to your project - it’s what defines us!
At Metstar Premier Era Innovations, we’re passionate about turning dreams into reality. We specialize in crafting both residential and commercial spaces in Maryland, DC and Northern Virginia with unwavering attention to detail. Our values of integrity, innovation, and collaboration drive every project we undertake. We listen, create, and build all while prioritizing your vision and aspirations. Trust us to bring excellence and quality to your project - it’s what defines us!
Licensed, Insured, and bonded contractor in VA, MD, and DC. VA License#: 2705186804 MD License#: 153831 DC License#: 410523000415 As a locally-owned insulation business, we're committed to providing the best customer satisfaction for our customers and neighbors. We provide free home energy audits to Northern Virginia, DC, and Maryland. We specialize in the Residential and Commercial installation of Spray Foam, Blown-in, and Batt Insulation. Whether you need to remove and replace old insulation with new energy efficient insulation, or you have a new construction project, we do it! We have developed a reputation for providing high quality insulation services at the most affordable prices. Our well trained technicians ensure that the process is quick, effective, and that all of your needs are taken care of along the way.
"The project went very smoothly overall, and the insulation looks great. Jeff did a fantastic job explaining to me the whole process and getting me an estimate, without making me feel pressured to buy. The install team kept me informed the entire time, cleaned up after themselves, and left my house as clean as it was when they first came in. And to top it off, the foam looks great, and is performing just how they said it would."
Brian H on May 2023
Licensed, Insured, and bonded contractor in VA, MD, and DC. VA License#: 2705186804 MD License#: 153831 DC License#: 410523000415 As a locally-owned insulation business, we're committed to providing the best customer satisfaction for our customers and neighbors. We provide free home energy audits to Northern Virginia, DC, and Maryland. We specialize in the Residential and Commercial installation of Spray Foam, Blown-in, and Batt Insulation. Whether you need to remove and replace old insulation with new energy efficient insulation, or you have a new construction project, we do it! We have developed a reputation for providing high quality insulation services at the most affordable prices. Our well trained technicians ensure that the process is quick, effective, and that all of your needs are taken care of along the way.
"The project went very smoothly overall, and the insulation looks great. Jeff did a fantastic job explaining to me the whole process and getting me an estimate, without making me feel pressured to buy. The install team kept me informed the entire time, cleaned up after themselves, and left my house as clean as it was when they first came in. And to top it off, the foam looks great, and is performing just how they said it would."
Brian H on May 2023
Maryland state licensed, certified and insured Home and Building Inspector, Ati Inspections dba Affordable Thorough Infrared Residential and Commercial Building Inspections,Over 30 years of construction related experience, we use Infrared technology in all our inspections, we provide Ancillary services, Moisture Intrusion, Energy Audit, Air Quality, Well water, Mold, Wood Destroying Organisms ( Termite etc), Thermography, Thermal Imaging, pre-sale, Member and certified by interNACHI .
Maryland state licensed, certified and insured Home and Building Inspector, Ati Inspections dba Affordable Thorough Infrared Residential and Commercial Building Inspections,Over 30 years of construction related experience, we use Infrared technology in all our inspections, we provide Ancillary services, Moisture Intrusion, Energy Audit, Air Quality, Well water, Mold, Wood Destroying Organisms ( Termite etc), Thermography, Thermal Imaging, pre-sale, Member and certified by interNACHI .
Our Specialties are Interior Painting, Remodeling, Framing, Paneling, Drywall, Powerwashing, Flooring, Fence Deck stain and seal. Making your house a home with Creativity, Revisions and Enhancements! Owner operated business with 20+ years of experience.
Our Specialties are Interior Painting, Remodeling, Framing, Paneling, Drywall, Powerwashing, Flooring, Fence Deck stain and seal. Making your house a home with Creativity, Revisions and Enhancements! Owner operated business with 20+ years of experience.
Environmental Mold Control provides professional mold removal, disinfecting, and insulation services in MD, VA, WV. At this time we don't do air quality testing. A sister company to Environmental Pest Control, Environmental Mold Control was created because of the gap in the market to provide customers with professional and cost effective mold removal services. Leveraging existing infrastructure and business processes, Environmental Mold Control provides the same or better mold removal services at lower prices than the competition. Call us today and let us show you why our customers love us!
"I couldn't be happier with the service provided. The office was very friendly and the workers who came to my home were very kind and professional."
Branson J on October 2020
Environmental Mold Control provides professional mold removal, disinfecting, and insulation services in MD, VA, WV. At this time we don't do air quality testing. A sister company to Environmental Pest Control, Environmental Mold Control was created because of the gap in the market to provide customers with professional and cost effective mold removal services. Leveraging existing infrastructure and business processes, Environmental Mold Control provides the same or better mold removal services at lower prices than the competition. Call us today and let us show you why our customers love us!
"I couldn't be happier with the service provided. The office was very friendly and the workers who came to my home were very kind and professional."
Branson J on October 2020
Rooftop Designs is one of the **highest rated** roofers in all of Maryland, Virginia and Washington D.C.! 98% of our customers rate us a full FIVE stars. We specialize in roofing, window installation, siding, door installation, gutters, and attic insulation. We measure our success by our customer's satisfaction with our work and our products. With over 11 years of experience in the home improvement industry, Rooftop Designs delivers world-class service at affordable pricing. Our new roofs include a 50-year warranty and feature a wind resistance rating of up to 130 mph. Rooftop Designs is proud to say that we are a Certainteed Master Shingle Applicator, which ensures that our installers are fully-trained on the latest roofing materials and applications. This allows us to offer a manufacturer's warranty of up to 50 years labor and material, on top of our own 50-year warranty. We stay up-to-date on local building requirements and home owner's association guidelines in order to make sure that your project is completed on-time and done right, the first time. If you're looking for the finest roofing, window and door installation, siding, gutters, and attic insulation company in the Washington, D.C. metro area, give us a call today or send us a website inquiry. We are local to you and available to tackle any job; big or small. Our professional team stands ready to provide you with the highest-quality products and the sincere commitment to customer service that you deserve.
"ROOFTOP DESIGN IS A HORRIBLE SCAM I would be remiss not to take the time to warn others. ROOFTOP DESIGN came as a third option for roofing. However, the initial representative ED form ROOFTOP DESIGN was very professional and thorough. The problem is, he represented a bunch of shysters. Ed’s first quote to was $35,000. After approximately three days of conversation and negotiations we were at $17,000.00 for the exact same product that they tried to sale for $35,000. Salesmen Ed was no-longer reaching out to me. Someone by the name of John called me and asked, what is it that they can do to make this deal happen. We settled at $16,500.00. Once again, $16,500 for everything discussed for the original $35,000 including a 50-year warranty that is transferable to a buyer as a good selling point. I learned through John that they fired Ed for giving customers too good of deals. I also learned through John that this company has a starting bidding price and a bottom bidding price. Ed would give the bottom price too quickly. So, they fired him. (Although John’s price was better than Ed’s). Once the job started, I received a text from the owner Yanni Avramidis. He stated that there was a third layer of roofing. He also stated that it would not be a problem and that it would take a little longer. IF THERE WAS GOING TO BE ANY ADDITIONAL CHARGES, NOW WOULD BE THE TIME TO MENTION IT. Approximately two days after the completion of the job. I had a contractor over named B. B. was there to replace the soffit beneath the location where the new roof was installed. This is when I learned and saw with my own two eyes that there was rotted or no plywood at all supporting my brand-new shingles. Mind you: per our contract, there will be an extra charge for plywood beyond the first ten free sheets. This company put my expensive shingles on top of rotted wood or no wood at all. I must admit, I was upset. However, I was cool calm and collected when I reached out to the owner Yanni Avramidis. I sent him the pictures of my findings. His explanation was that I had a 50-year warranty. My point to the owner was, if I wasn’t trying to replace my soffit it might have been months or years before this was discovered. I also said, what about the elderly man or woman that doesn’t have the ambition to check your work??? The owner of ROOFTOP DESIGN became very irate. He said, “I am from Baltimore, haven’t you heard about people from Baltimore. I will beat your a**. You are going to pay me an additional $2,800.00 for the third layer of roofing and planks/ plywood.” Since I have yet to see any new plywood, I am being charged $3,000.00 per layer of roofing to be removed. I received paperwork from ROOFTOP DESIGN, the paperwork stated that my warranty was only good for as long as I owned the property. Non-transferable: Of course, I didn’t sign it. My point is, there are people being taken advantage of everyday by bullies like ROOFTOP DESIGN."
Shaniqua H on September 2023
Rooftop Designs is one of the **highest rated** roofers in all of Maryland, Virginia and Washington D.C.! 98% of our customers rate us a full FIVE stars. We specialize in roofing, window installation, siding, door installation, gutters, and attic insulation. We measure our success by our customer's satisfaction with our work and our products. With over 11 years of experience in the home improvement industry, Rooftop Designs delivers world-class service at affordable pricing. Our new roofs include a 50-year warranty and feature a wind resistance rating of up to 130 mph. Rooftop Designs is proud to say that we are a Certainteed Master Shingle Applicator, which ensures that our installers are fully-trained on the latest roofing materials and applications. This allows us to offer a manufacturer's warranty of up to 50 years labor and material, on top of our own 50-year warranty. We stay up-to-date on local building requirements and home owner's association guidelines in order to make sure that your project is completed on-time and done right, the first time. If you're looking for the finest roofing, window and door installation, siding, gutters, and attic insulation company in the Washington, D.C. metro area, give us a call today or send us a website inquiry. We are local to you and available to tackle any job; big or small. Our professional team stands ready to provide you with the highest-quality products and the sincere commitment to customer service that you deserve.
"ROOFTOP DESIGN IS A HORRIBLE SCAM I would be remiss not to take the time to warn others. ROOFTOP DESIGN came as a third option for roofing. However, the initial representative ED form ROOFTOP DESIGN was very professional and thorough. The problem is, he represented a bunch of shysters. Ed’s first quote to was $35,000. After approximately three days of conversation and negotiations we were at $17,000.00 for the exact same product that they tried to sale for $35,000. Salesmen Ed was no-longer reaching out to me. Someone by the name of John called me and asked, what is it that they can do to make this deal happen. We settled at $16,500.00. Once again, $16,500 for everything discussed for the original $35,000 including a 50-year warranty that is transferable to a buyer as a good selling point. I learned through John that they fired Ed for giving customers too good of deals. I also learned through John that this company has a starting bidding price and a bottom bidding price. Ed would give the bottom price too quickly. So, they fired him. (Although John’s price was better than Ed’s). Once the job started, I received a text from the owner Yanni Avramidis. He stated that there was a third layer of roofing. He also stated that it would not be a problem and that it would take a little longer. IF THERE WAS GOING TO BE ANY ADDITIONAL CHARGES, NOW WOULD BE THE TIME TO MENTION IT. Approximately two days after the completion of the job. I had a contractor over named B. B. was there to replace the soffit beneath the location where the new roof was installed. This is when I learned and saw with my own two eyes that there was rotted or no plywood at all supporting my brand-new shingles. Mind you: per our contract, there will be an extra charge for plywood beyond the first ten free sheets. This company put my expensive shingles on top of rotted wood or no wood at all. I must admit, I was upset. However, I was cool calm and collected when I reached out to the owner Yanni Avramidis. I sent him the pictures of my findings. His explanation was that I had a 50-year warranty. My point to the owner was, if I wasn’t trying to replace my soffit it might have been months or years before this was discovered. I also said, what about the elderly man or woman that doesn’t have the ambition to check your work??? The owner of ROOFTOP DESIGN became very irate. He said, “I am from Baltimore, haven’t you heard about people from Baltimore. I will beat your a**. You are going to pay me an additional $2,800.00 for the third layer of roofing and planks/ plywood.” Since I have yet to see any new plywood, I am being charged $3,000.00 per layer of roofing to be removed. I received paperwork from ROOFTOP DESIGN, the paperwork stated that my warranty was only good for as long as I owned the property. Non-transferable: Of course, I didn’t sign it. My point is, there are people being taken advantage of everyday by bullies like ROOFTOP DESIGN."
Shaniqua H on September 2023
MLM was started with a simple concept: Potential clients, no matter what their individual or family needs, should always be approached with a genuine desire to understand their vision all while delivering a product that brings their dream to life.
"Great MLM did the roof installation. Everything worked out very well on time all aspects of the installation met my expectations. In addition, we had a gutter installation and gutter guards . Modifications were needed all went well on time follow up professional service. I would use MLM for further work and also would recommend them to friends and family"
Joe F on March 2025
MLM was started with a simple concept: Potential clients, no matter what their individual or family needs, should always be approached with a genuine desire to understand their vision all while delivering a product that brings their dream to life.
"Great MLM did the roof installation. Everything worked out very well on time all aspects of the installation met my expectations. In addition, we had a gutter installation and gutter guards . Modifications were needed all went well on time follow up professional service. I would use MLM for further work and also would recommend them to friends and family"
Joe F on March 2025
Our primary goal is to assist forward-thinking, thrifty individuals and businesses with the implementation of energy efficient services, ranging from energy audits to building automation. Contact us today to learn more about the many ways that we can reduce your individual or business carbon footprint and save money!
"It went great! Very professional work. They made me feel comfortable that my issue was handled."
Cidney K on April 2019
Our primary goal is to assist forward-thinking, thrifty individuals and businesses with the implementation of energy efficient services, ranging from energy audits to building automation. Contact us today to learn more about the many ways that we can reduce your individual or business carbon footprint and save money!
"It went great! Very professional work. They made me feel comfortable that my issue was handled."
Cidney K on April 2019
Insulation services FAQs
When choosing a professional insulation installer, consider asking these questions to determine the best fit.
Will you address air leaks in my house?
Can you provide an R-value (heat resistance) fact sheet?
What kind of insulation will work best for my home?
How do you handle signs of a water leak?
Are you licensed and insured?
Can you provide customer references?
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.
In some cases, you may not have enough insulation to properly regulate your home’s temperature. Watch for a few signs your home needs more insulation, such as:
High heating and cooling bills
Uncomfortable room temperatures
Ice dams on the edge of your roof
Roof leaks
Cold floors and walls
Freezing pipes
Temperature fluctuations
Visibly low insulation
Noise problems
Pest problems
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
- Brunswick
- Lovettsville
- Jefferson
- Bolivar
- Shannondale
- Harpers Ferry
- Point Of Rocks
- Middletown
- Keedysville
- Sharpsburg
- Braddock Heights
- Shenandoah Junction
- Ballenger Creek
- Waterford
- Shepherdstown
- Adamstown
- Ranson
- Buckeystown
- Lansdowne
- Charles Town
- Boonsboro
- Paeonian Springs
- Hillsboro
- Myersville
- Purcellville
- Urbana
- Leesburg
- Hamilton
- Frederick
- Fairplay
Get our Angi-powered app
