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Roof sealant application pros in Rockville
Deal with a contractor, not a salesman! William Mackay Roofing has been providing roofing, gutter, and general contracting services in the D.C and surrounding areas for over three generations with a fourth on its way. As a family owned and operated company we specialize in all forms of roofing, tuck pointing, gutter work, and new siding projects. We operate and are licensed/insured for D.C, Virginia, and Maryland. William Mackay is proud to be A+ rated with the BBB and we take pride in our customer service and quality of work. Should you choose to work with us, your satisfaction will be our top priority! If you are in need of an estimate our family will be more than happy to help you out so please don't hesitate to contact us. We hope to hear from you soon!
"Did a great job and cleaned up all debris."
Joe V on August 2024
Deal with a contractor, not a salesman! William Mackay Roofing has been providing roofing, gutter, and general contracting services in the D.C and surrounding areas for over three generations with a fourth on its way. As a family owned and operated company we specialize in all forms of roofing, tuck pointing, gutter work, and new siding projects. We operate and are licensed/insured for D.C, Virginia, and Maryland. William Mackay is proud to be A+ rated with the BBB and we take pride in our customer service and quality of work. Should you choose to work with us, your satisfaction will be our top priority! If you are in need of an estimate our family will be more than happy to help you out so please don't hesitate to contact us. We hope to hear from you soon!
"Did a great job and cleaned up all debris."
Joe V on August 2024
Family owned and operated, 40 years experiece in roofing and gutters. We only use premium quality materials, highly qualified and BBB member.
"Reasonably priced and responsive. His team provided next day service to complete roof repairs."
David G on May 2025
Family owned and operated, 40 years experiece in roofing and gutters. We only use premium quality materials, highly qualified and BBB member.
"Reasonably priced and responsive. His team provided next day service to complete roof repairs."
David G on May 2025
James McMillan Contracting is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"James and his crew are amazing! They are honest, trustworthy, and fair. I got ripped off by another company that had extremely poor workmanship. I called Jim and explained the issue and he sent his crew to fix it the next day. I want to thank him from the bottom of my heart for his help with this issue. I feel so much better now that the hole in my roof has been repaired the right way."
Patrice G on July 2024
James McMillan Contracting is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"James and his crew are amazing! They are honest, trustworthy, and fair. I got ripped off by another company that had extremely poor workmanship. I called Jim and explained the issue and he sent his crew to fix it the next day. I want to thank him from the bottom of my heart for his help with this issue. I feel so much better now that the hole in my roof has been repaired the right way."
Patrice G on July 2024
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"I've used them on 3 different roof repairs at 3 different times and places over the past year. I've been extremely satisfied with their price, timeliness and quality. "
Rajasekhar J on April 2025
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"I've used them on 3 different roof repairs at 3 different times and places over the past year. I've been extremely satisfied with their price, timeliness and quality. "
Rajasekhar J on April 2025
New Castle Constructs is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Yes, New Castle Construction did excellent work today 3/14/25. Joseph was my rep. and was very consistent until I committed. Nadir actually came and did the roof job, and satisfied my expectations fully. I hope the best for this business and it continues to thrive and flourish. Kudos you guys! Satisfied Customer Hana B. Sxxxx"
Hana B on March 2025
New Castle Constructs is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Yes, New Castle Construction did excellent work today 3/14/25. Joseph was my rep. and was very consistent until I committed. Nadir actually came and did the roof job, and satisfied my expectations fully. I hope the best for this business and it continues to thrive and flourish. Kudos you guys! Satisfied Customer Hana B. Sxxxx"
Hana B on March 2025
D. Fuentes painting is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Very professional and very high quality."
Teryal T on May 2025
D. Fuentes painting is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Very professional and very high quality."
Teryal T on May 2025
Our continuing goal is to provide professional services to our customers on an ongoing basis. Integrity, honesty, quality workmanship, and customer service are our priorities. We always go the extra mile to ensure customer satisfaction. Day or Evening Free Estimates Available* Virtual Estimates available. Take a photo - Measure - Call - We Install - Its that simple. *All homeowners must be present and other conditions apply
"Amazing and quick service and amazing customer service"
Katie D on June 2024
Our continuing goal is to provide professional services to our customers on an ongoing basis. Integrity, honesty, quality workmanship, and customer service are our priorities. We always go the extra mile to ensure customer satisfaction. Day or Evening Free Estimates Available* Virtual Estimates available. Take a photo - Measure - Call - We Install - Its that simple. *All homeowners must be present and other conditions apply
"Amazing and quick service and amazing customer service"
Katie D on June 2024
CALL E.R. ROOFING COMPANY FOR ALL YOUR ROOFING, SIDING AND GUTTER NEEDS. ASK ABOUT OUR UPCOMING FALL SPECIALS! We strive to provide excellent customer service and quality craftsmanship at affordable prices We specialize in: • Roof replacements • Roof repairs • Vinyl, Wood and Hardie plank siding replacements and repairs • Gutters • Window and Door replacements • Exterior trim repairs and replacements
"E.R. Roofing installed hardiboard siding on my house and new windows throughout the house. They were careful and professional in every way. The quality of the work is second to none. The pricing was very fair. And the after-the-job customer service has been nothing but over-the-top. Elliott is responsive and cares about his customers, which is why he will be the one to install the next roof on my house when it is time to do so. I can't say enough good things about E.R. Roofing."
Neal B B on May 2022
CALL E.R. ROOFING COMPANY FOR ALL YOUR ROOFING, SIDING AND GUTTER NEEDS. ASK ABOUT OUR UPCOMING FALL SPECIALS! We strive to provide excellent customer service and quality craftsmanship at affordable prices We specialize in: • Roof replacements • Roof repairs • Vinyl, Wood and Hardie plank siding replacements and repairs • Gutters • Window and Door replacements • Exterior trim repairs and replacements
"E.R. Roofing installed hardiboard siding on my house and new windows throughout the house. They were careful and professional in every way. The quality of the work is second to none. The pricing was very fair. And the after-the-job customer service has been nothing but over-the-top. Elliott is responsive and cares about his customers, which is why he will be the one to install the next roof on my house when it is time to do so. I can't say enough good things about E.R. Roofing."
Neal B B on May 2022
Since 1992, Roofing Pups, Roofing & Siding - MD has provided homeowners and business owners with top quality, factory-direct products, professionally installed by licensed, bonded installers with over 25 years of home improvement experience. Our experience sales representative will assist you with the windows and/or doors that suit you best. Roofing Pups Roofing & Siding takes pride in building relationships with not only our consumers but with our manufacturers as well. We have maintained a reputable business relationship with both of our leading manufactures, American Jewel and Home Guard, for 15 years. Being a locally owned and operated company, Roofing Pups is able to provide you with top quality products with a bottom line price! Come see for yourself how Air Tite Windows & Doors, Inc. can make your home look stunning and more energy efficient.
"Great.good job"
linwood c on May 2025
Since 1992, Roofing Pups, Roofing & Siding - MD has provided homeowners and business owners with top quality, factory-direct products, professionally installed by licensed, bonded installers with over 25 years of home improvement experience. Our experience sales representative will assist you with the windows and/or doors that suit you best. Roofing Pups Roofing & Siding takes pride in building relationships with not only our consumers but with our manufacturers as well. We have maintained a reputable business relationship with both of our leading manufactures, American Jewel and Home Guard, for 15 years. Being a locally owned and operated company, Roofing Pups is able to provide you with top quality products with a bottom line price! Come see for yourself how Air Tite Windows & Doors, Inc. can make your home look stunning and more energy efficient.
"Great.good job"
linwood c on May 2025
Marshall Roofing, Siding & Windows is a top roofing, siding, windows, and gutters company based in Northern Virginia. Throughout the years providing the highest level of customer service and 100% homeowner satisfaction has been the pinnacle principle at Marshall Roofing Siding & Windows. The belief that each and every homeowner deserves to receive good value for their money is the driving concept on the functions of the company. **Popular Returning Spring Promotion Coming Soon** (Inquire for additional details)
"It was time to replace my roof and I requested several estimates from roofing companies. I selected Marshall Roofing Siding and Windows. It was not the cheapest estimate but the estimate assessment by Mr. Chris Butler, of Marshall Roofing, was the most thorough. Mr. Butler inspected the roof, went into the attic (and found a bathroom vent venting into the attic instead of outside), went into my screened in porch to determine what kind of nails to use so that they would not come through the tongue and groove ceiling and he noticed some old satellite dishes that could be removed. Marshall roofing updated the proposal several times with all of my concerns and additions. This is great customer service! When it came to choosing a shingle color, we struggled to find the right color. Mr. Butler kindly offered to bring out additional shingle samples to us on a Friday afternoon. Again, above and beyond customer service. Mr. Butler also worked with us to find and install an attic fan specifically designed to be quiet when running. The job started promptly on time and was finished in two days. Mr. Butler came out as the job was wrapping up and when the crew finished packing up, on his own, he did a second magnetic sweep around my house to find any nails that may have been missed during the magnetic sweep performed by the crew. Again, great customer service! We are very happy with the workmanship and customer service that we received from Marshall Roofing and would highly recommend their services!!"
David T on April 2023
Marshall Roofing, Siding & Windows is a top roofing, siding, windows, and gutters company based in Northern Virginia. Throughout the years providing the highest level of customer service and 100% homeowner satisfaction has been the pinnacle principle at Marshall Roofing Siding & Windows. The belief that each and every homeowner deserves to receive good value for their money is the driving concept on the functions of the company. **Popular Returning Spring Promotion Coming Soon** (Inquire for additional details)
"It was time to replace my roof and I requested several estimates from roofing companies. I selected Marshall Roofing Siding and Windows. It was not the cheapest estimate but the estimate assessment by Mr. Chris Butler, of Marshall Roofing, was the most thorough. Mr. Butler inspected the roof, went into the attic (and found a bathroom vent venting into the attic instead of outside), went into my screened in porch to determine what kind of nails to use so that they would not come through the tongue and groove ceiling and he noticed some old satellite dishes that could be removed. Marshall roofing updated the proposal several times with all of my concerns and additions. This is great customer service! When it came to choosing a shingle color, we struggled to find the right color. Mr. Butler kindly offered to bring out additional shingle samples to us on a Friday afternoon. Again, above and beyond customer service. Mr. Butler also worked with us to find and install an attic fan specifically designed to be quiet when running. The job started promptly on time and was finished in two days. Mr. Butler came out as the job was wrapping up and when the crew finished packing up, on his own, he did a second magnetic sweep around my house to find any nails that may have been missed during the magnetic sweep performed by the crew. Again, great customer service! We are very happy with the workmanship and customer service that we received from Marshall Roofing and would highly recommend their services!!"
David T on April 2023
Roof sealant applications FAQs
A roof coating system lasts between 10 and 20 years. With a premium coating and regular maintenance—like inspections and touch-ups—your roof will stay protected against weather damage and water intrusion. This enhances its durability and preserves its structural integrity throughout its lifespan. Make sure to keep in contact with a roof coating pro so that you don’t miss regulating resealing.
You should recoat or reseal your roof every four to six years. Maintaining a consistent recoating schedule preserves the integrity of the protective seal and prevents moisture penetration and material degradation. High-quality, built-up roof systems require this interval, and if an EPDM roof begins to leak, replacing the coating becomes necessary to restore full protection.
A roof coating can seal small cracks and stop minor water infiltration, helping to prevent roof leaks. While the coating enhances the roof’s durability and prevents early signs of leakage, it does not replace the need for full-scale repairs when substantial structural damage exists. Professional evaluation and repair are required to resolve significant water intrusion and ensure your roof retains long-lasting protection.
- Roofing Installation & Roof Repair
- Traditional Tile Roofing - Install or Replace
- Flat, Foam, or Single Ply Roofing - Install or Replace
- Natural Slate Roofing - Install or Replace
- Metal Roofing - Install or Replace
- Asphalt Shingle Roofing - Install or Replace
- Wood Shake or Composite Roofing - Repair
- Heating Cable for Roof - Install
- Natural Slate Roofing - Repair
- Wood Shake or Composite Roofing - Install or Replace
- Flat, Foam or Single Ply Roofing - Repair
- Traditional Tile Roofing - Repair
- Asphalt Shingle Roofing - Repair
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