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    Verified insulation services reviews

Find Insulation pros in Adelphi

Avatar for Discount Energy Services

Discount Energy Services

4.36(
81
)
Approved Pro

Discount Energy Services

4.36(
81
)
Approved Pro
Customers say: Terrific value
41 years of experience
Free onsite estimate

Discount Energy Services has been insulating homes in Northern Virginia and the Washington, D.C. Metro area for over 30 years, and we have insulated more older homes than any of the other insulation contractors. The owner has over 40 years experience, and has always been specialized in insulating the older homes. Please call to have questions about your home insulation needs personally answered, and for an appointment for your free insulation estimate. After consulting with us, you may decide which type of insulation, and how much insulation you want after we give you your insulation suggestions, and we will also let you know what we recommend most. We will send our energy conservation specialist to your home to measure, and give you your free written prices for the energy saving options best suited for your home, whenever you are ready. Thanks again for checking with us. We guarantee the best job at the best price, and look forward to your call.

"Job done beautiful"

Thomas W on October 2024

Discount Energy Services has been insulating homes in Northern Virginia and the Washington, D.C. Metro area for over 30 years, and we have insulated more older homes than any of the other insulation contractors. The owner has over 40 years experience, and has always been specialized in insulating the older homes. Please call to have questions about your home insulation needs personally answered, and for an appointment for your free insulation estimate. After consulting with us, you may decide which type of insulation, and how much insulation you want after we give you your insulation suggestions, and we will also let you know what we recommend most. We will send our energy conservation specialist to your home to measure, and give you your free written prices for the energy saving options best suited for your home, whenever you are ready. Thanks again for checking with us. We guarantee the best job at the best price, and look forward to your call.

"Job done beautiful"

Thomas W on October 2024


Avatar for Atlas Home Energy Solutions

Atlas Home Energy Solutions

4.75(
12
)
Approved Pro

Atlas Home Energy Solutions

4.75(
12
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
16 years of experience

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. We also qualify energy efficiency and comfort improvements in existing homes for significant utility rebates and federal tax credits, up to $10,000.00! 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.

"5 stars!! Their pricing was the most competitive, and their communication was outstanding! Had our THOW insulated with closed cell spray foam and they did an awesome job from the very beginning of the process until the end. Would highly recommend!"

Shannon P on March 2023

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. We also qualify energy efficiency and comfort improvements in existing homes for significant utility rebates and federal tax credits, up to $10,000.00! 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.

"5 stars!! Their pricing was the most competitive, and their communication was outstanding! Had our THOW insulated with closed cell spray foam and they did an awesome job from the very beginning of the process until the end. Would highly recommend!"

Shannon P on March 2023


Avatar for Terra Insulation

Terra Insulation

4.86(
7
)
Approved Pro

Terra Insulation

4.86(
7
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
5 years of experience

Our insulation and home performance company is dedicated to creating more comfortable and energy-efficient homes. Our mission is to help homeowners save money on their energy bills while reducing their carbon footprint. With years of experience in the industry, we specialize in providing top-quality insulation and air-sealing services that are tailored to meet the unique needs of each client. Our team of BPI certified Energy Strategists used the latest technology, techniques and standards to ensure that your home is properly insulated, so you can enjoy optimal comfort year-round. Whether you need insulation installed, air sealing services, or a comprehensive home energy audit, we are here to help you achieve your goals.

"It went well. A small mis-communication caused by accidental damage to a ceiling, but it worked out fine."

Robert f on July 2025

Our insulation and home performance company is dedicated to creating more comfortable and energy-efficient homes. Our mission is to help homeowners save money on their energy bills while reducing their carbon footprint. With years of experience in the industry, we specialize in providing top-quality insulation and air-sealing services that are tailored to meet the unique needs of each client. Our team of BPI certified Energy Strategists used the latest technology, techniques and standards to ensure that your home is properly insulated, so you can enjoy optimal comfort year-round. Whether you need insulation installed, air sealing services, or a comprehensive home energy audit, we are here to help you achieve your goals.

"It went well. A small mis-communication caused by accidental damage to a ceiling, but it worked out fine."

Robert f on July 2025


Avatar for ROI Construction LLC

ROI Construction LLC

5.00(
9
)
Approved Pro

ROI Construction LLC

5.00(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
51 years of experience

Why choose ROI Construction? Our Gold Standard guarantee is 100% customer satisfaction, 100% of the time! - It's that simple. No need to keep looking for “Contractor near me,” we are the top local Maryland and DC family owned Exterior company (est. 1974) that delivers the best results and a positive return on investment in the area! ROI also does a final walkthrough of every-single-job to ensure that we deliver a superior finished product for every ROI customer!

"Very pleased with the roofing and siding work performed by ROI Construction. Jose was especially helpful and very knowledgeable in all areas of home repair, including roofing, skylights, trim and siding. Brooke did a great job scheduling and managing the project. Highly recommend ROI for your roofing/remodeling needs."

Rachel S on September 2025

Why choose ROI Construction? Our Gold Standard guarantee is 100% customer satisfaction, 100% of the time! - It's that simple. No need to keep looking for “Contractor near me,” we are the top local Maryland and DC family owned Exterior company (est. 1974) that delivers the best results and a positive return on investment in the area! ROI also does a final walkthrough of every-single-job to ensure that we deliver a superior finished product for every ROI customer!

"Very pleased with the roofing and siding work performed by ROI Construction. Jose was especially helpful and very knowledgeable in all areas of home repair, including roofing, skylights, trim and siding. Brooke did a great job scheduling and managing the project. Highly recommend ROI for your roofing/remodeling needs."

Rachel S on September 2025


"The company deserves 1000 stars l. Chris came and gave a well thorough inspection and estimate of my actic. Had my concerns and expectations, I had several other companies come and give quotes for double the price. Especially ORKIN. Orkin tried to use care tactics to sign contract without any explanation. Chris gave the quote and the crew arrived a week later as scheduled. Chris has a great work crew who were professional , caring, and did high quality work. Every step of the way, I was communicated and was filled in. I was shown before , during and after photos. And end results were UNBELIEVABLE Chris is fair and honest, he gives reasonable prices and will not take advantage of his customers."

Andrew K on November 2024

Owner operated. Award winning. Quality Insulation

"The company deserves 1000 stars l. Chris came and gave a well thorough inspection and estimate of my actic. Had my concerns and expectations, I had several other companies come and give quotes for double the price. Especially ORKIN. Orkin tried to use care tactics to sign contract without any explanation. Chris gave the quote and the crew arrived a week later as scheduled. Chris has a great work crew who were professional , caring, and did high quality work. Every step of the way, I was communicated and was filled in. I was shown before , during and after photos. And end results were UNBELIEVABLE Chris is fair and honest, he gives reasonable prices and will not take advantage of his customers."

Andrew K on November 2024


Avatar for Maxc Impressions LLC

Maxc Impressions LLC

4.90(
255
)

Maxc Impressions LLC

4.90(
255
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

Residential Painting, Remodeling & Home Improvement Company. Please call or text at (240) 643-2794 to reach an estimator directly. Quick and free estimates on-site visit or via pictures (if applies). MHIC Licensed & Insured. 20 years of experience. Residential Remodeling, Renovations, Interior Painting, Exterior Painting, Housecleaning, Carpet Cleaning, Drywall repairs, & Tile, Ceramics, & Carpentry. Handyman work. Wallpaper removal. New basements, bathrooms, and kitchens. New vinyl, hardwood floors, doors, and moldings. Billing can be checks or credit cards. Silver Spring MD, Rockville MD, Kensington MD, Bethesda MD, Potomac MD & Frederick, MD.

"The contractor was professional, efficient, and skilled. An estimate was quickly provided, and the contractor was able to schedule immediately."

Akiba P on September 2023

Residential Painting, Remodeling & Home Improvement Company. Please call or text at (240) 643-2794 to reach an estimator directly. Quick and free estimates on-site visit or via pictures (if applies). MHIC Licensed & Insured. 20 years of experience. Residential Remodeling, Renovations, Interior Painting, Exterior Painting, Housecleaning, Carpet Cleaning, Drywall repairs, & Tile, Ceramics, & Carpentry. Handyman work. Wallpaper removal. New basements, bathrooms, and kitchens. New vinyl, hardwood floors, doors, and moldings. Billing can be checks or credit cards. Silver Spring MD, Rockville MD, Kensington MD, Bethesda MD, Potomac MD & Frederick, MD.

"The contractor was professional, efficient, and skilled. An estimate was quickly provided, and the contractor was able to schedule immediately."

Akiba P on September 2023


Avatar for Paul Henry's Window Installation Inc

Paul Henry's Window Installation Inc

4.90(
145
)

Paul Henry's Window Installation Inc

4.90(
145
)
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

Paul Henry’s Window Installation installs superior-quality energy-efficient:Windows, Doors, Siding, Decks, Gutters, Roofs & Attic Insulation. Our products and services will beautify your home and dramatically reduce your home heating and cooling costs. Paul Henry and his installation crew have more than 30 years' experience providing home remodeling services to Northern Virginia homeowners.

"From the estimate to the installation Paul and his crew were awesome. My wife and I were very nervous about the preparation we had to perform, curtains down, furniture moved etc. We also expected some drywall and paint damage. We're both older so this was a huge albatross and as such we kept putting it off. We finally decided to bite the bullet and get it done so I asked Brian Henry if he could come out to review my furniture moving plan to assure we gave them the required space. He came out and was extremely professional, helpful and put us completely at ease. Several weeks later Brad and James were out to install the windows and three days later were done with absolutely zero damage to drywall or paint. And in fact since the bay windows were primed they didn't even need painting although we'll do it anyway. To top it off, they even protected our landscape in front of our widows and all plants survived. Brad and James were polite and meticulous with the installation. They covered everything up inside our house and put down extra thick tarps. They were punctual in starting each day and finishing. They patiently answered all our questions addressing our concerns. And they were complete in 3 days as we were told. Once they were gone, you couldn’t tell they’d even been here. In fact, I looked around and commented to my wife that we’d never spent so much money on something we couldn’t even see. To be clear the windows looked almost identical to those that were removed except for these being brand new. I do expect our electric bill will be reduced and I suspect they will be a good selling point when we move. Finally, the cost was very fair, I had reached out to two other firms and both were substantially higher. The original windows had also been installed by Paul Henry so I was very comfortable even though his costs was lower. Bottom line, we highly recommend Paul Henry Windows."

bill b on December 2024

Paul Henry’s Window Installation installs superior-quality energy-efficient:Windows, Doors, Siding, Decks, Gutters, Roofs & Attic Insulation. Our products and services will beautify your home and dramatically reduce your home heating and cooling costs. Paul Henry and his installation crew have more than 30 years' experience providing home remodeling services to Northern Virginia homeowners.

"From the estimate to the installation Paul and his crew were awesome. My wife and I were very nervous about the preparation we had to perform, curtains down, furniture moved etc. We also expected some drywall and paint damage. We're both older so this was a huge albatross and as such we kept putting it off. We finally decided to bite the bullet and get it done so I asked Brian Henry if he could come out to review my furniture moving plan to assure we gave them the required space. He came out and was extremely professional, helpful and put us completely at ease. Several weeks later Brad and James were out to install the windows and three days later were done with absolutely zero damage to drywall or paint. And in fact since the bay windows were primed they didn't even need painting although we'll do it anyway. To top it off, they even protected our landscape in front of our widows and all plants survived. Brad and James were polite and meticulous with the installation. They covered everything up inside our house and put down extra thick tarps. They were punctual in starting each day and finishing. They patiently answered all our questions addressing our concerns. And they were complete in 3 days as we were told. Once they were gone, you couldn’t tell they’d even been here. In fact, I looked around and commented to my wife that we’d never spent so much money on something we couldn’t even see. To be clear the windows looked almost identical to those that were removed except for these being brand new. I do expect our electric bill will be reduced and I suspect they will be a good selling point when we move. Finally, the cost was very fair, I had reached out to two other firms and both were substantially higher. The original windows had also been installed by Paul Henry so I was very comfortable even though his costs was lower. Bottom line, we highly recommend Paul Henry Windows."

bill b on December 2024


Avatar for Atlantic Duct Cleaning

Atlantic Duct Cleaning

4.87(
451
)

Atlantic Duct Cleaning

4.87(
451
)
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

QUALIFICATIONS : ADC has successfully performed HVAC air duct cleaning on more than 160,000 systems. Proud member of the NADCA (National Air Duct Cleaners Association) since 1995. Please call our office today at 703-435-4485 Certification #11950078 The Atlantic Duct Cleaning process meets or exceeds all related industry standards. Certified by the NADCA in Ventilation System Mold Remediation (VSMR) and Certified Ventilation Inspection (CVI). Certification #V303030426 Active Member, IAQA (Indoor Air Quality Association) AWARDS Angie’s List Super Service Award from 2009 -2021 and is Better Business Bureau Accredited Business with A+ Rating. NADCA’s Safety Award Recipient (eight times), past winner of Outstanding Safety Award THE ATLANTIC DIFFERENCE Our service fee is based on the number of systems (we won’t waste time counting your vents!) Customer’s final cost of service is provided in advance, when the appointment is scheduled (you needn’t worry about unexpected add-ons after our technicians arrive) Our highly trained office staff and technicians will answer any and all of your questions about equipment, policies, and procedures (you can be confident that you are receiving the highest quality service) Simple online appointment scheduling available. All ADC technicians are professionally trained, in-house employees (we don’t use temps or subcontractors) 100% satisfaction guaranteed (if you’re not happy, we’re not happy!) TECHNOLOGY: State-of-the-art HyperVac Equipment HEPA-Filtered Vacuums for dust free experience NADCA-Certified Source Removal Air Duct Cleaning (only proven method to correctly clean your duct system)

"They came out to clean our duck on one day notice before the installation of our new HVAC system and perform a great job. They had all the proper duct cleaning equipment, they even cleaned our dryer vent for no extra charge. They were very professional, showed up on time, cleaned up work areas. Highly recommend."

Natalia Q on November 2024

QUALIFICATIONS : ADC has successfully performed HVAC air duct cleaning on more than 160,000 systems. Proud member of the NADCA (National Air Duct Cleaners Association) since 1995. Please call our office today at 703-435-4485 Certification #11950078 The Atlantic Duct Cleaning process meets or exceeds all related industry standards. Certified by the NADCA in Ventilation System Mold Remediation (VSMR) and Certified Ventilation Inspection (CVI). Certification #V303030426 Active Member, IAQA (Indoor Air Quality Association) AWARDS Angie’s List Super Service Award from 2009 -2021 and is Better Business Bureau Accredited Business with A+ Rating. NADCA’s Safety Award Recipient (eight times), past winner of Outstanding Safety Award THE ATLANTIC DIFFERENCE Our service fee is based on the number of systems (we won’t waste time counting your vents!) Customer’s final cost of service is provided in advance, when the appointment is scheduled (you needn’t worry about unexpected add-ons after our technicians arrive) Our highly trained office staff and technicians will answer any and all of your questions about equipment, policies, and procedures (you can be confident that you are receiving the highest quality service) Simple online appointment scheduling available. All ADC technicians are professionally trained, in-house employees (we don’t use temps or subcontractors) 100% satisfaction guaranteed (if you’re not happy, we’re not happy!) TECHNOLOGY: State-of-the-art HyperVac Equipment HEPA-Filtered Vacuums for dust free experience NADCA-Certified Source Removal Air Duct Cleaning (only proven method to correctly clean your duct system)

"They came out to clean our duck on one day notice before the installation of our new HVAC system and perform a great job. They had all the proper duct cleaning equipment, they even cleaned our dryer vent for no extra charge. They were very professional, showed up on time, cleaned up work areas. Highly recommend."

Natalia Q on November 2024


Avatar for ENERGY EFFICIENCY EXPERTS

ENERGY EFFICIENCY EXPERTS

4.87(
207
)

ENERGY EFFICIENCY EXPERTS

4.87(
207
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

We are a full service Home Performance Contractor providing energy audits, weatherization and performance verification. Our BPI trained technicians focus our audits on solving problems, making our clients homes more comfortable and thereby reducing their utility bills.

"Energy Efficiency Experts was prompt, friendly and informative. Loved working with the owner and her team! Would definitely recommend to anyone early on in their process."

Catherine B on September 2019

We are a full service Home Performance Contractor providing energy audits, weatherization and performance verification. Our BPI trained technicians focus our audits on solving problems, making our clients homes more comfortable and thereby reducing their utility bills.

"Energy Efficiency Experts was prompt, friendly and informative. Loved working with the owner and her team! Would definitely recommend to anyone early on in their process."

Catherine B on September 2019


Avatar for Air Duct Maids

Air Duct Maids

4.88(
277
)

Air Duct Maids

4.88(
277
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

We truly specialize in cleaning your Air Ducts and Dryer vent. Our Owners have 25 years of experience in the service industry. Here at Air Duct Maids our company’s goal is to provide Every customer with the Superior Service YOU deserve. We achieve this by using the industries BEST equipment combined with our dedicated professional technicians. Our Technicians are background checked and also certified with the National Air Duct Cleaners Association (NADCA). We only have truck mounted equipment to accomplish the finest cleaning. We will do a walk through inspection prior to starting your service. During our service we protect your home as if it were our own by laying down drop clothes, placing corner guards, and thoroughly cleaning up after we have finished. Over 15,000 fires are caused each year due to clogged dryer vents that could have been avoidable. Our cleaning process involves a complete flush of the inside and back of the dryer as well as the whole vent from inside to the outside. Our technicians will also inspect the vent for bird nests or any other blockages and provide you with solutions. Finally, we always check and ensure that your dryer vent has good airflow.

We truly specialize in cleaning your Air Ducts and Dryer vent. Our Owners have 25 years of experience in the service industry. Here at Air Duct Maids our company’s goal is to provide Every customer with the Superior Service YOU deserve. We achieve this by using the industries BEST equipment combined with our dedicated professional technicians. Our Technicians are background checked and also certified with the National Air Duct Cleaners Association (NADCA). We only have truck mounted equipment to accomplish the finest cleaning. We will do a walk through inspection prior to starting your service. During our service we protect your home as if it were our own by laying down drop clothes, placing corner guards, and thoroughly cleaning up after we have finished. Over 15,000 fires are caused each year due to clogged dryer vents that could have been avoidable. Our cleaning process involves a complete flush of the inside and back of the dryer as well as the whole vent from inside to the outside. Our technicians will also inspect the vent for bird nests or any other blockages and provide you with solutions. Finally, we always check and ensure that your dryer vent has good airflow.

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Insulation questions, answered by experts

Reduces energy costs, improves comfort, and prevents ice dams in winter.

Selling a house with spray foam insulation can be challenging due to concerns about improper installation or its compatibility with the home's structure. If not applied correctly, spray foam can cause issues such as moisture buildup, cracking, or damage to wiring and plumbing. If the insulation didn't cure correctly, there are also flammability concerns. Removing or repairing this type of insulation can pose risks as well.

If you're replacing insulation, it's a good idea to remove the old insulation before adding new. This is especially true if the existing insulation has suffered from water damage or been exposed to pests. You also need to remove old insulation if you'll be installing a new and different type of insulation, such as trading roll or batt insulation for spray foam.

The most affordable way to insulate behind unfinished walls is to install fiberglass batts or rolls. These total around $0.75 per linear foot, with the width matching the gaps between standard studs perfectly. However, it’s important to consider the R-value of your insulation and the climate in your area, as fiberglass insulation isn’t the best in terms of preventing heat transfer. Plus, the most affordable option may cost more on electricity bills over time. The most affordable way to insulate behind finished walls is to leave them up and use blown-in insulation to avoid drywall replacement.

Yes, you need a 1.5-inch to 2-inch air gap in a cathedral ceiling to allow proper air flow and prevent cathedral ceiling venting problems. This amount of airspace allows warm, moist air to properly leave your ceiling to avoid moisture build-up and other issues that put your home at risk. You can also add an air vent for extra air flow.

The Adelphi, MD homeowners’ guide to insulation services

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

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