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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 DUCTZ of the Upper Bay Region

DUCTZ of the Upper Bay Region

4.96(
138
)

DUCTZ of the Upper Bay Region

4.96(
138
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

There IS A DIFFERENCE in duct cleaners. Most only clean "some" of the system, but DUCTZ Cleans the entire system including the Air Handler, supply and return ducts, and all components in the duct system. We are NADCA Certified (National Air Duct Cleaners Assoc) Air duct and Dryer vent Cleaning. DUCTZ is dedicated to making every home a cleaner and healthier place to be. We care about your home and respect it in every way. We don’t just clean ducts, we restore air conditioning systems to peak cleanliness. Our cleaning procedures are in full compliance with the industry standards from NADCA and ACCA. Not all duct cleaners are alike. Our techniques involve far more than simply air whipping your ducts. Ducts are fully brushed with brushes suitable for the ductwork being cleaned (see photos for the huge difference brushing makes over just using air tools). We take before and after photos as part of our process, assuring that all ducts are thouroughly clean. We are experienced and professional HVAC Air Duct cleaners, Ventilation System inspectors, and also perform quality Dryer Vent Cleanng serving Baltimore, Harford and Cecil Counties in Maryland. We are members of, and certified by NADCA (National Air Duct Cleaners Association) specializing in HVAC units and duct work: Certifications include "Air System Cleaning Specialist" and "Ventilation Sytem Mold Remediator" and certified Ventiliation System Inspector (ASCS, VSMR, CVI) from NADCA. Technicians are bright, well groomed, uniformed, experienced, attentive and well trained in all facets of indoor air quality. We service Residential, Commercial, Industrial and Restoration applications. DUCTZ is fully insured and bonded. Estimates are free, as they are an expected part of cleaning using the right methods and at the right price. When you want to breath easy, and live healthy, call DUCTZ. 410-692-9775

"We are having our HVAC replaced and our salesperson recommended DUCTZ. DUCTZ came out on-time today to clean our air vents. The communication prior to the visit was very clear and it was easy to understand the upcoming process. They were very considerate, we toured our home and they went right to work bringing in the needed equipment and moving necessary furniture to access the vent covers. They were diligent and stayed focused on the task. Before I knew it, they were reattaching the cleaned vent covers and removing the equipment. Within a few hours, we had before/after pictures and have a great sense of comfort knowing all the gunk is gone! I highly recommend DUCTZ!"

Lisa B on November 2025

There IS A DIFFERENCE in duct cleaners. Most only clean "some" of the system, but DUCTZ Cleans the entire system including the Air Handler, supply and return ducts, and all components in the duct system. We are NADCA Certified (National Air Duct Cleaners Assoc) Air duct and Dryer vent Cleaning. DUCTZ is dedicated to making every home a cleaner and healthier place to be. We care about your home and respect it in every way. We don’t just clean ducts, we restore air conditioning systems to peak cleanliness. Our cleaning procedures are in full compliance with the industry standards from NADCA and ACCA. Not all duct cleaners are alike. Our techniques involve far more than simply air whipping your ducts. Ducts are fully brushed with brushes suitable for the ductwork being cleaned (see photos for the huge difference brushing makes over just using air tools). We take before and after photos as part of our process, assuring that all ducts are thouroughly clean. We are experienced and professional HVAC Air Duct cleaners, Ventilation System inspectors, and also perform quality Dryer Vent Cleanng serving Baltimore, Harford and Cecil Counties in Maryland. We are members of, and certified by NADCA (National Air Duct Cleaners Association) specializing in HVAC units and duct work: Certifications include "Air System Cleaning Specialist" and "Ventilation Sytem Mold Remediator" and certified Ventiliation System Inspector (ASCS, VSMR, CVI) from NADCA. Technicians are bright, well groomed, uniformed, experienced, attentive and well trained in all facets of indoor air quality. We service Residential, Commercial, Industrial and Restoration applications. DUCTZ is fully insured and bonded. Estimates are free, as they are an expected part of cleaning using the right methods and at the right price. When you want to breath easy, and live healthy, call DUCTZ. 410-692-9775

"We are having our HVAC replaced and our salesperson recommended DUCTZ. DUCTZ came out on-time today to clean our air vents. The communication prior to the visit was very clear and it was easy to understand the upcoming process. They were very considerate, we toured our home and they went right to work bringing in the needed equipment and moving necessary furniture to access the vent covers. They were diligent and stayed focused on the task. Before I knew it, they were reattaching the cleaned vent covers and removing the equipment. Within a few hours, we had before/after pictures and have a great sense of comfort knowing all the gunk is gone! I highly recommend DUCTZ!"

Lisa B on November 2025


"He does not respond to warranty repairs. The window he installed has been broke for almost 2 years, called and left numerous messages but he does not return any of my phone calls."

Michael M on July 2020

Home improvements. Award wining. No repairs. We sell and install our own products. Period.

"He does not respond to warranty repairs. The window he installed has been broke for almost 2 years, called and left numerous messages but he does not return any of my phone calls."

Michael M on July 2020


Avatar for Advanced Green Home Solutions

Advanced Green Home Solutions

5.00(
40
)

Advanced Green Home Solutions

5.00(
40
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

ANNAPOLIS AND HANOVER, MD: Award-Winning BGE, Pepco and Delmarva Power certified Home Energy Audits, Insulation, Air Sealing, Solar, and HVAC -- all with utility rebates. We fix your home's energy efficiency from the inside out. Unlike many contractors, we discount your utility rebate immediately on your proposed work scope, so you don't have to wait for the check in the mail. Angi Super Service Award winners each year from 2016 to 2023! MBE certified Woman Owned Business. Our weatherization crew consists of our own in-house and full-time Lead Carpenter and trained Retrofit Technicians for high quality control. Advanced Green Home Solutions is an elite BPI GoldStar Contractor. Contact us for the $100 Comprehensive Home Performance Audit to qualify for rebates or the No-Additional Cost Quick Home Energy Check-Up (QHEC) in BGE, Pepco, and Delmarva Power areas.

"Great service and professionalism Team was knowledgeable"

Keshia G on October 2023

ANNAPOLIS AND HANOVER, MD: Award-Winning BGE, Pepco and Delmarva Power certified Home Energy Audits, Insulation, Air Sealing, Solar, and HVAC -- all with utility rebates. We fix your home's energy efficiency from the inside out. Unlike many contractors, we discount your utility rebate immediately on your proposed work scope, so you don't have to wait for the check in the mail. Angi Super Service Award winners each year from 2016 to 2023! MBE certified Woman Owned Business. Our weatherization crew consists of our own in-house and full-time Lead Carpenter and trained Retrofit Technicians for high quality control. Advanced Green Home Solutions is an elite BPI GoldStar Contractor. Contact us for the $100 Comprehensive Home Performance Audit to qualify for rebates or the No-Additional Cost Quick Home Energy Check-Up (QHEC) in BGE, Pepco, and Delmarva Power areas.

"Great service and professionalism Team was knowledgeable"

Keshia G on October 2023


In business since 2003. Fully insured by State Farm ins. No subcontracting. We take Cash, Check or Credit Card. Call for Special offers!


Avatar for Guardian Protection

Guardian Protection

4.74(
2,120
)

Guardian Protection

4.74(
2,120
)
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

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


Avatar for WS CONTRACTORS INC

WS CONTRACTORS INC

4.95(
160
)

WS CONTRACTORS INC

4.95(
160
)
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

WS CONTRACTORS INC. HAS BEEN OPERATING IN THE GREATER BALTIMORE REGION FOR OVER 15 YEARS. WS CONTRACTORS INC. IS COMMITTED TO QUALITY HOME IMPROVEMENTS AND BUILDING LASTING RELATIONSHIPS WITH ALL OUR CUSTOMERS. WE OFFER COMPETITIVE RATES AND ALL LABOR IS GUARANTEED FOR A MINIMUM OF 3 YEARS, ONE OF THE LONGEST IN THE INDUSTRY! COST IS DETERMINED BY THE JOB. HANDYMAN SERVICE RATES START AT $125.00 PER HOUR AND $90.00 FOR EACH ADDITIONAL HOUR PLUS MATERIALS. YOU CAN CONTACT US AT THE PROVIDED PHONE NUMBER OR EMAIL US AT - [email protected]

"WS Contractors are professional, friendly, skilled and affordable! I would hire them again without hesitation"

Derrick A on November 2020

WS CONTRACTORS INC. HAS BEEN OPERATING IN THE GREATER BALTIMORE REGION FOR OVER 15 YEARS. WS CONTRACTORS INC. IS COMMITTED TO QUALITY HOME IMPROVEMENTS AND BUILDING LASTING RELATIONSHIPS WITH ALL OUR CUSTOMERS. WE OFFER COMPETITIVE RATES AND ALL LABOR IS GUARANTEED FOR A MINIMUM OF 3 YEARS, ONE OF THE LONGEST IN THE INDUSTRY! COST IS DETERMINED BY THE JOB. HANDYMAN SERVICE RATES START AT $125.00 PER HOUR AND $90.00 FOR EACH ADDITIONAL HOUR PLUS MATERIALS. YOU CAN CONTACT US AT THE PROVIDED PHONE NUMBER OR EMAIL US AT - [email protected]

"WS Contractors are professional, friendly, skilled and affordable! I would hire them again without hesitation"

Derrick A on November 2020


We specialize in helping property owners undo the damage caused by water, fire, smoke, and mold. We are a veteran-owned and operated company.


Avatar for General Home Improvement LLC

General Home Improvement LLC

4.85(
78
)

General Home Improvement LLC

4.85(
78
)
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

Full Service Home Improvement Company Specializing in Replacement Exterior Improvements. Replacement Roofing, Windows, Doors, Gutters & Gutter Protection. We resonantly took over DOOR & WINDOW WAREHOUSE. We will still offer some of there Replacement Doors and Window lines but will Discontinue All Custom and Specialty Wood Lines. We use local and regionally manufactured products and are a Atlas Pro & GAF Certified Roofing Installer. Our focus is outstanding workmanship and customer satisfaction. We take most major credit cards, offer great financing such as our 12 months same as interest free program. We have an A rating with the Better Business Bureau and a Five Star Rating with Home Advisor. I'm sorry we do not offer Handy Man Type Services and are a Full Replacement Company. Email Chris (Owner) - [email protected].

"From start to finish it was a great experience. Fred came out and spoke with my husband and myself. He was very sensitive to our needs and budget. I loved the door that we chose. Installation was amazing the crew arrived on time and treated our home as if were theirs. I would definitely use this company again."

Sonja Y on August 2019

Full Service Home Improvement Company Specializing in Replacement Exterior Improvements. Replacement Roofing, Windows, Doors, Gutters & Gutter Protection. We resonantly took over DOOR & WINDOW WAREHOUSE. We will still offer some of there Replacement Doors and Window lines but will Discontinue All Custom and Specialty Wood Lines. We use local and regionally manufactured products and are a Atlas Pro & GAF Certified Roofing Installer. Our focus is outstanding workmanship and customer satisfaction. We take most major credit cards, offer great financing such as our 12 months same as interest free program. We have an A rating with the Better Business Bureau and a Five Star Rating with Home Advisor. I'm sorry we do not offer Handy Man Type Services and are a Full Replacement Company. Email Chris (Owner) - [email protected].

"From start to finish it was a great experience. Fred came out and spoke with my husband and myself. He was very sensitive to our needs and budget. I loved the door that we chose. Installation was amazing the crew arrived on time and treated our home as if were theirs. I would definitely use this company again."

Sonja Y on August 2019

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Insulation questions, answered by experts

You should insulate ducts in a crawl space if you live in a colder climate or you run your air conditioning for most of the year. Insulating ducts doesn't take too much time or investment and can make a big difference on your electricity bill. While this is more difficult in a crawl space, if any ductwork is being done either you or a professional will be down there anyway. A bonus benefit is since they will be putting off less hot or cold air they'll be less attractive to any unwanted pests in the home.

These two types of foams are similar chemically, but they are applied in a much different way and each has its own pros and cons. Spray foam can only be used if the area where you will be installing the installation is wide open and easy to access. Injection foam should be used where it's cost-prohibitive to remove the walls that are placed over the insulation. Spray foam is a much less expensive process and requires less expertise. 

Spray foam insulation doesn’t do well around heat sources. Therefore, You can use spray foam insulation to seal around HVAC boots that penetrate through the drywalls or around where wrapped ducts connect to the boots, but we don’t recommend using spray foam insulation to encapsulate your air ducts. Spray foam insulation on air ducts is also less effective compared to duct wraps.

Yes, exposure to fiberglass insulation can cause harm to your skin and eyes. However, this typically refers to the fiberglass insulation that is mostly used in walls and attics. Fiberglass doors don’t pose risks for fiberglass exposure because they're fully encased in polymer cladding.

Chimney liners often benefit from insulation, though it is not always required. Insulation helps improve the liner's efficiency by keeping flue gasses hotter, which enhances draft and reduces creosote buildup. It also prevents condensation, which can lead to corrosion. Insulation is important for chimneys on exterior walls or in colder climates. Some building codes may require insulation, so checking local regulations is essential.

The Darlington, MD homeowners’ guide to insulation services

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