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*The Angi rating for Insulation Service companies in Harrington, DE 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 Harrington, DE 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 November 24, 2025
Find Insulation pros in Harrington

Groundworks
Groundworks
Established in 1997, Groundworks is a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across Philadelphia & New Jersey, we bring our local expertise closer to you. Groundworks proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At Groundworks, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! PA158514 (PA)
"Tyrell did an excellent job correcting the mistakeS of the people who installed my basement waterproofing equipment. There was a terrible rotten egg smell and that's gone now. Tyrell cleaned up after himself, if any water spilled he made sure to vacuum it up and to dispose of everything in the proper place."
Alexander M on September 2023
Established in 1997, Groundworks is a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across Philadelphia & New Jersey, we bring our local expertise closer to you. Groundworks proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At Groundworks, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! PA158514 (PA)
"Tyrell did an excellent job correcting the mistakeS of the people who installed my basement waterproofing equipment. There was a terrible rotten egg smell and that's gone now. Tyrell cleaned up after himself, if any water spilled he made sure to vacuum it up and to dispose of everything in the proper place."
Alexander M on September 2023
Dixie's Insulation, LLC
Dixie's Insulation, LLC
In Business Since 2006 About Us We are a small family-owned business that has been servicing the Delmarva Peninsula and beyond since 2007. We insulate residential areas using insulation of your choice, options include: batts insulation, spray foam, blow insulation, foam boards, etc. We service crawlspaces, offer insulation removal services, caulking services, and more. Please call us if you have any questions and we are more than welcome to help!
"Very good one day to remove old insulation and another to spray new insulation"
John O on April 2024
In Business Since 2006 About Us We are a small family-owned business that has been servicing the Delmarva Peninsula and beyond since 2007. We insulate residential areas using insulation of your choice, options include: batts insulation, spray foam, blow insulation, foam boards, etc. We service crawlspaces, offer insulation removal services, caulking services, and more. Please call us if you have any questions and we are more than welcome to help!
"Very good one day to remove old insulation and another to spray new insulation"
John O on April 2024

Guardian Protection
Guardian Protection
Protecting homes and businesses since 1950, Guardian Protection is one of the nation's largest and most highly regarded security companies. We provide smart technology, 24/7 professional monitoring, and peace of mind to hundreds of thousands of customers. Our products are installed by experts, monitored by real people, and truly make a difference. We do what we do because of one simple truth: life is better when it's safe.
"We hired Guardian to install our security system at our Washington, DC, business. The service and quality of the work was horrible. We had cameras and an alarm system installed; it was a relatively large system. They outsource most of the work to various vendors. They could not manage their vendors; what was supposed to take a week took two months. The sales rep did not return calls, and you could never get anyone in management on the phone. Random people would show up at unannounced times. The few things that an actual Guardian employee did were they made a huge mess of our newly remodeled office and were rude to our staff. We have offices in five markets across the US and have high security at each; we have never had such a poor experience."
William M on December 2024
Protecting homes and businesses since 1950, Guardian Protection is one of the nation's largest and most highly regarded security companies. We provide smart technology, 24/7 professional monitoring, and peace of mind to hundreds of thousands of customers. Our products are installed by experts, monitored by real people, and truly make a difference. We do what we do because of one simple truth: life is better when it's safe.
"We hired Guardian to install our security system at our Washington, DC, business. The service and quality of the work was horrible. We had cameras and an alarm system installed; it was a relatively large system. They outsource most of the work to various vendors. They could not manage their vendors; what was supposed to take a week took two months. The sales rep did not return calls, and you could never get anyone in management on the phone. Random people would show up at unannounced times. The few things that an actual Guardian employee did were they made a huge mess of our newly remodeled office and were rude to our staff. We have offices in five markets across the US and have high security at each; we have never had such a poor experience."
William M on December 2024

E S G, Inc.
E S G, Inc.
Energy Services Group is a certified and award-winning Home Performance with Energy Star contractor. We follow the best practices of the program to ensure that your home maximizes the available rebate opportunities and realizes all the comforts and savings gained by becoming more energy efficient. At Energy Services Group we work within the Delaware, New Jersey and Pennsylvania Energy Efficiency Rebate Programs. Energy Services Group is a Gold Star BPI Contractor.
"Great job!"
Rob E on October 2024
Energy Services Group is a certified and award-winning Home Performance with Energy Star contractor. We follow the best practices of the program to ensure that your home maximizes the available rebate opportunities and realizes all the comforts and savings gained by becoming more energy efficient. At Energy Services Group we work within the Delaware, New Jersey and Pennsylvania Energy Efficiency Rebate Programs. Energy Services Group is a Gold Star BPI Contractor.
"Great job!"
Rob E on October 2024

Advance Roofing Windows Siding & Doors
Advance Roofing Windows Siding & Doors
Serving Delaware, Maryland (Cecil, Harford, Kent and Worcester Counties, New Jersey (Salem and Glouchester Counties) and Pennsylvania (Chester and Delaware Counties), Advance provides full-service offerings for all your home exterior remodeling projects including roofing, window, siding, doors, sunrooms and deck installation. Since our inception in 1989, Advance, Inc. has become widely recognized as the Delaware Valley #1 choice for exterior remodeling projects. President and Founder, Gary Derrick, began working in the remodeling industry at an early age and in doing so gained valuable insight into delivering top quality products and a great customer experience. As an engineer, Gary worked in the vinyl replacement window manufacturing business where he learned the importance of offering a premium product coupled with professional installation at a reasonable price. With Gary's experience, Advance, Inc. is dedicated to offering superior building products installed by certified professional installers at a price that’s affordable. All building products offered by Advance are accompanied by a comprehensive, no-nonsense warranty that homeowners can rely on. Advance proudly boasts an extensive Workmanship Guarantee on all products we install. Advance is a family-owned business that is fully bonded, licensed, and insured. We look forward to making your remodeling project a great experience from start to finish. Our success as a company has everything to do with being up front, fair, and honest with our customers. Because we control everything about our roofing, siding, windows and doors from measuring to installation and service, we stand behind the promises we make. We hope you’ll give us the opportunity to show your family how our products can enhance the beauty, comfort, and efficiency of your home. Please give us a call for a free estimate and find out just how affordable your next project will actually be.
"Staff was professional, knowledgeable, and did not push upgrades. We’ve used them multiple times since replacing our roof. "
Lorin H on September 2025
Serving Delaware, Maryland (Cecil, Harford, Kent and Worcester Counties, New Jersey (Salem and Glouchester Counties) and Pennsylvania (Chester and Delaware Counties), Advance provides full-service offerings for all your home exterior remodeling projects including roofing, window, siding, doors, sunrooms and deck installation. Since our inception in 1989, Advance, Inc. has become widely recognized as the Delaware Valley #1 choice for exterior remodeling projects. President and Founder, Gary Derrick, began working in the remodeling industry at an early age and in doing so gained valuable insight into delivering top quality products and a great customer experience. As an engineer, Gary worked in the vinyl replacement window manufacturing business where he learned the importance of offering a premium product coupled with professional installation at a reasonable price. With Gary's experience, Advance, Inc. is dedicated to offering superior building products installed by certified professional installers at a price that’s affordable. All building products offered by Advance are accompanied by a comprehensive, no-nonsense warranty that homeowners can rely on. Advance proudly boasts an extensive Workmanship Guarantee on all products we install. Advance is a family-owned business that is fully bonded, licensed, and insured. We look forward to making your remodeling project a great experience from start to finish. Our success as a company has everything to do with being up front, fair, and honest with our customers. Because we control everything about our roofing, siding, windows and doors from measuring to installation and service, we stand behind the promises we make. We hope you’ll give us the opportunity to show your family how our products can enhance the beauty, comfort, and efficiency of your home. Please give us a call for a free estimate and find out just how affordable your next project will actually be.
"Staff was professional, knowledgeable, and did not push upgrades. We’ve used them multiple times since replacing our roof. "
Lorin H on September 2025

Paddy's LLC
Paddy's LLC
Paddy’s is a local family owned and operated business. Paddy’s is located in Newark, DE, where most of our employees, including the owner, have lived for most of their lives. The owner, “Paddy,” founded the business with the main goal of customer satisfaction in mind. At Paddy’s we strive for excellence and to ensure that we always leave our customers not just happy, but educated. We feel it is our job to not only repair your home but to leave you with an understanding of what was wrong and how it was repaired. From a simple gutter cleaning to a full roof replacement, every job and customer are treated with integrity and respect. At Paddy’s we know a happy customer is our best referral and we are thankful every day for the opportunity to serve our community. Our team is ready to help you out so feel free to contact us for your FREE estimate today!
"I don’t think there are enough characters available to explain how badly they lied and misled us. I called with one specific purpose, which I was very clear about. I have stained fascia, and I wanted to know the cause and then have it repaired. The owner and another contractor explained that they would remove the fascia to identify the cause, which could be my gutters. The estimate was based on what was likely the cause, but I was assured multiple times that they would remove the fascia to confirm. so I signed the estimate. They repaired my gutters and left without removing the fascia, which was the sole reason that I contacted them. When I questioned it, they said their estimate didn’t say that, however, we had a clear verbal agreement, which they violated, and offered to do the actual work I wanted from the beginning for $500+ more after I paid $1100 for something that may not have been necessary. I’m filing multiple complaints and citing Unfair, Deceptive, Abusive Acts and Practices (UDAAP)."
Christina A on October 2023
Paddy’s is a local family owned and operated business. Paddy’s is located in Newark, DE, where most of our employees, including the owner, have lived for most of their lives. The owner, “Paddy,” founded the business with the main goal of customer satisfaction in mind. At Paddy’s we strive for excellence and to ensure that we always leave our customers not just happy, but educated. We feel it is our job to not only repair your home but to leave you with an understanding of what was wrong and how it was repaired. From a simple gutter cleaning to a full roof replacement, every job and customer are treated with integrity and respect. At Paddy’s we know a happy customer is our best referral and we are thankful every day for the opportunity to serve our community. Our team is ready to help you out so feel free to contact us for your FREE estimate today!
"I don’t think there are enough characters available to explain how badly they lied and misled us. I called with one specific purpose, which I was very clear about. I have stained fascia, and I wanted to know the cause and then have it repaired. The owner and another contractor explained that they would remove the fascia to identify the cause, which could be my gutters. The estimate was based on what was likely the cause, but I was assured multiple times that they would remove the fascia to confirm. so I signed the estimate. They repaired my gutters and left without removing the fascia, which was the sole reason that I contacted them. When I questioned it, they said their estimate didn’t say that, however, we had a clear verbal agreement, which they violated, and offered to do the actual work I wanted from the beginning for $500+ more after I paid $1100 for something that may not have been necessary. I’m filing multiple complaints and citing Unfair, Deceptive, Abusive Acts and Practices (UDAAP)."
Christina A on October 2023

Dry-Tek Environmental
Dry-Tek Environmental
Dry Tek Environmental is a commercial and home improvement contractor specializing in indoor environmental problems caused by excessive moisture. We are located on the Eastern Shore in Salisbury, Maryland. Dry Tek Environmental provides comprehensive, evidence-based reports, assessments and estimates for problems ranging from musty odors to damage caused by fire and water. Dry Tek Environmental designs, installs and maintains CHAMP™ Crawl space Humidity and Moisture Prevention Systems in Salisbury and Ocean Pines, Maryland. Salisbury & Ocean Pines Crawl Space Company Logo | Dry Tek Environmental
"It’s not often that a reviewer praises a contractor for what he DIDN’T do. Austin Ireland, the owner and operator of Drytek, didn’t propose spending several thousand dollars on encapsulating my wet crawl space. He said that in my case encapsulation might not be cost effective. You see, my 50 year-old home’s foundation consists of 8”x 8” wood posts, with the foundation’s perimeter enclosed by 1”x 6” boards, slatted to allow for ventilation. The layout of my irregular crawl space posed other installation problems as well. Among other things, insulation panels would need to be installed to form walls in addition to the vapor barrier and a large dehumidifier. Four contractors/salespersons preceded Drytek’s Austin Ireland. One simply said there’s nothing that can be done. Another proposed encapsulating the crawl space from the OUTSIDE, but thankfully never followed up. Another did an evaluation, but never returned my calls. Dryzone wanted $8,500 but offered a pressure tactic $425 discount if I signed a vague contract the same day the salesman came. Later the salesperson said the installation of insulation boards would raise the cost significantly. The salesperson at Dryzone also said he would call back with details, but didn’t. Drytek’s Austin Ireland, on the other hand, took more time than any of the others to carefully examine my crawl space. I crawled with him as he pointed out the condition of my crawl space and the challenges of encapsulation. By this time, my own research had better prepared me to better evaluate proposals. I found him to be knowledgeable, straightforward and honest. I was a highly motivated prospective customer. Last year a HVAC system had been installed with the air handler, electronics, and ductwork in my crawl space. The moisture in the crawl space last summer was degrading the new system. So what did Austin Ireland of Drytek propose? Four centrifugal snail fans joined together by extension cords, placed strategically in the crawl space. These are not exhaust fans to ventilate, but rather air movers like you may have seen in public bathrooms to dry floors. He even showed me what to do, and wouldn’t take any payment for his visit. After investing $400 the next day at Home Depot , I located the fans, connected the extension cords to the receptacles in the fans and waited for the heat and humidity to test Austin Ireland’s theory. It is now six weeks later and we have had three prolonged periods of hot, humid weather during which I have activated the fans. THE CRAWL SPACE HAS STAYED AS DRY AS A BONE. Amazing! The vast majority of wet crawl spaces need to be encapsulated; mine did not. But it took a trustworthy expert whose ethics mattered more than profit to present the best solution for me. Austin Ireland, owner and operator of Drytek, is that person."
Dale A on June 2019
Dry Tek Environmental is a commercial and home improvement contractor specializing in indoor environmental problems caused by excessive moisture. We are located on the Eastern Shore in Salisbury, Maryland. Dry Tek Environmental provides comprehensive, evidence-based reports, assessments and estimates for problems ranging from musty odors to damage caused by fire and water. Dry Tek Environmental designs, installs and maintains CHAMP™ Crawl space Humidity and Moisture Prevention Systems in Salisbury and Ocean Pines, Maryland. Salisbury & Ocean Pines Crawl Space Company Logo | Dry Tek Environmental
"It’s not often that a reviewer praises a contractor for what he DIDN’T do. Austin Ireland, the owner and operator of Drytek, didn’t propose spending several thousand dollars on encapsulating my wet crawl space. He said that in my case encapsulation might not be cost effective. You see, my 50 year-old home’s foundation consists of 8”x 8” wood posts, with the foundation’s perimeter enclosed by 1”x 6” boards, slatted to allow for ventilation. The layout of my irregular crawl space posed other installation problems as well. Among other things, insulation panels would need to be installed to form walls in addition to the vapor barrier and a large dehumidifier. Four contractors/salespersons preceded Drytek’s Austin Ireland. One simply said there’s nothing that can be done. Another proposed encapsulating the crawl space from the OUTSIDE, but thankfully never followed up. Another did an evaluation, but never returned my calls. Dryzone wanted $8,500 but offered a pressure tactic $425 discount if I signed a vague contract the same day the salesman came. Later the salesperson said the installation of insulation boards would raise the cost significantly. The salesperson at Dryzone also said he would call back with details, but didn’t. Drytek’s Austin Ireland, on the other hand, took more time than any of the others to carefully examine my crawl space. I crawled with him as he pointed out the condition of my crawl space and the challenges of encapsulation. By this time, my own research had better prepared me to better evaluate proposals. I found him to be knowledgeable, straightforward and honest. I was a highly motivated prospective customer. Last year a HVAC system had been installed with the air handler, electronics, and ductwork in my crawl space. The moisture in the crawl space last summer was degrading the new system. So what did Austin Ireland of Drytek propose? Four centrifugal snail fans joined together by extension cords, placed strategically in the crawl space. These are not exhaust fans to ventilate, but rather air movers like you may have seen in public bathrooms to dry floors. He even showed me what to do, and wouldn’t take any payment for his visit. After investing $400 the next day at Home Depot , I located the fans, connected the extension cords to the receptacles in the fans and waited for the heat and humidity to test Austin Ireland’s theory. It is now six weeks later and we have had three prolonged periods of hot, humid weather during which I have activated the fans. THE CRAWL SPACE HAS STAYED AS DRY AS A BONE. Amazing! The vast majority of wet crawl spaces need to be encapsulated; mine did not. But it took a trustworthy expert whose ethics mattered more than profit to present the best solution for me. Austin Ireland, owner and operator of Drytek, is that person."
Dale A on June 2019

ServiceMark Heating, Cooling & Plumbing
ServiceMark Heating, Cooling & Plumbing
For more than six decades now, ServiceMark has been providing comfort without compromise. Today, our exceptional team of technicians, installers, master plumbers, sales professionals and support staff consider your satisfaction their success. We offer 24/7 Emergency Service!
"Very professional, cleaned up, and did a great job"
William H on March 2020
For more than six decades now, ServiceMark has been providing comfort without compromise. Today, our exceptional team of technicians, installers, master plumbers, sales professionals and support staff consider your satisfaction their success. We offer 24/7 Emergency Service!
"Very professional, cleaned up, and did a great job"
William H on March 2020

Delmarva Insulation
Delmarva Insulation
Delmarva Insulation is a locally owned and operated, independent insulation contractor serving Georgetown, DE, the Delmarva Peninsula and the Eastern Shore of Maryland. We are the area's largest independent insulation contractor. We insulate commercial construction, healthcare and education buildings, multifamily construction, new homes and existing homes. Products include spray foam, fiberglass, cellulose, rigid foam board, mineral wool, crawl space insulation and crawl space drain systems. Contact us today for your free estimate and to discuss your next project.
Delmarva Insulation is a locally owned and operated, independent insulation contractor serving Georgetown, DE, the Delmarva Peninsula and the Eastern Shore of Maryland. We are the area's largest independent insulation contractor. We insulate commercial construction, healthcare and education buildings, multifamily construction, new homes and existing homes. Products include spray foam, fiberglass, cellulose, rigid foam board, mineral wool, crawl space insulation and crawl space drain systems. Contact us today for your free estimate and to discuss your next project.

Energy Savers
Energy Savers
Energy Savers is a full service Energy Auditing, and Weatherization Company, based in Maryland. We are proud of our certifications ranging from Advanced Weatherization Tactics, to Building Envelope Specialist. We pride ourselves in looking out for the homeowner’s best interest in all projects. We are a certified MHIC contractor trained, and skilled in energy efficient solutions. Providing timely and efficient workmanship, prompt and professional service, with an emphasis on getting it right the first time, using quality products and materials. Our staff is well versed, and experienced in all aspects of the home performance field. Our experience providing weatherization services over a broad range of programs has put us at the forefront of the field. Our staff has over 15 years combined experience managing and performing home weatherization for a variety of programs.
Energy Savers is a full service Energy Auditing, and Weatherization Company, based in Maryland. We are proud of our certifications ranging from Advanced Weatherization Tactics, to Building Envelope Specialist. We pride ourselves in looking out for the homeowner’s best interest in all projects. We are a certified MHIC contractor trained, and skilled in energy efficient solutions. Providing timely and efficient workmanship, prompt and professional service, with an emphasis on getting it right the first time, using quality products and materials. Our staff is well versed, and experienced in all aspects of the home performance field. Our experience providing weatherization services over a broad range of programs has put us at the forefront of the field. Our staff has over 15 years combined experience managing and performing home weatherization for a variety of programs.
The Harrington, DE homeowners’ guide to insulation services
From average costs to expert advice, get all the answers you need to get your job done.

Wool insulation offers a higher R-value than fiberglass but is more expensive. Use this guide to estimate wool insulation costs for your home.

Trying to calculate how much spray foam insulation costs? Our in-depth guide breaks down pricing by type, amount, and where you install it.

How much does a radiant barrier cost? Our guide breaks down prices by type of barrier and size of your attic space.

Insulation does more than keep your house warm in the winter and cool in the summer. Consider these factors when deciding to insulate your interior walls.

Learn the pros and cons of cellulose insulation to help you make an informed decision about whether it's the right choice for your home.

If your home’s temperature is uncomfortable or your energy bill is spiking, you should check your insulation. We'll help you find out if you should replace it.
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