Molecular Systems, Inc. is a construction firm which provides a modern approach in producing efficient strategies to servicing our clients' needs. From business owners, to government agencies, we provide the following services; Roofing, Waterproofing and a regional supplier of Construction Supplies.
Molecular Systems, Inc. is a construction firm which provides a modern approach in producing efficient strategies to servicing our clients' needs. From business owners, to government agencies, we provide the following services; Roofing, Waterproofing and a regional supplier of Construction Supplies.
Central Exteriors has been helping homeowners in Maryland and Washington, DC, and Northern Virginia repair and remodel their homes since 1956. Central Exteriors professional team of designers and installers will work with you to improve and enhance your home with top-quality products that will look beautiful and last for years to come. We maintain our excellent reputation through ongoing training and involvement in the remodeling industry. Bill Greenberg, past-President, is a member of the Professional Roofing Advisory Committee (PRAC) and was the 1991 president of the National Association of the Remodeling Industry (NARI). Several other members of our staff are NARI-Certified Remodelers - a certification that gives special recognition to remodeling contractors who demonstrate a high level of competence and ethical standards. We are recognized by the CertainTeed Corporation as being quality master shingle installers. You can be confident that we will put years of experience to work for you...to transform your house into a home of comfort and beauty. Financing available - inquire for info. Feel free to email us directly at info@centralexteriors.com.
"Very disappointing. The firm was very late in its installation work - months after it promised. Its anaylsis of our gutters was unreliable. and its responsiveness in correcting its work was slow and required multiple calls and emails."
Bradford S on May 2025
Central Exteriors has been helping homeowners in Maryland and Washington, DC, and Northern Virginia repair and remodel their homes since 1956. Central Exteriors professional team of designers and installers will work with you to improve and enhance your home with top-quality products that will look beautiful and last for years to come. We maintain our excellent reputation through ongoing training and involvement in the remodeling industry. Bill Greenberg, past-President, is a member of the Professional Roofing Advisory Committee (PRAC) and was the 1991 president of the National Association of the Remodeling Industry (NARI). Several other members of our staff are NARI-Certified Remodelers - a certification that gives special recognition to remodeling contractors who demonstrate a high level of competence and ethical standards. We are recognized by the CertainTeed Corporation as being quality master shingle installers. You can be confident that we will put years of experience to work for you...to transform your house into a home of comfort and beauty. Financing available - inquire for info. Feel free to email us directly at info@centralexteriors.com.
"Very disappointing. The firm was very late in its installation work - months after it promised. Its anaylsis of our gutters was unreliable. and its responsiveness in correcting its work was slow and required multiple calls and emails."
Bradford S on May 2025
Keith Roofing has been serving residential, commercial, and industrial customers since 1960. We've built our reputation on providing a high-quality finished product that will last for years! Count on our team for honesty and integrity when it comes to serving the needs of home and business owners in the DC area. Because each roof provides different challenges, such as the pitch of the roof, type of shingles, the gutter system, and number of valleys, Keith Roofing offers thorough on-site inspections and true estimates of your roofing repair needs. WE are based in and only service Washington,DC- SO we specialize on working on these Beautiful Historic Homes we have here in the District.
"They couldn't have been more responsive or helpful. Customer satisfaction was clearly their top priority. It was literally some of the best customer service I have ever experienced! I could not recommend them more!"
Brent L on October 2020
Keith Roofing has been serving residential, commercial, and industrial customers since 1960. We've built our reputation on providing a high-quality finished product that will last for years! Count on our team for honesty and integrity when it comes to serving the needs of home and business owners in the DC area. Because each roof provides different challenges, such as the pitch of the roof, type of shingles, the gutter system, and number of valleys, Keith Roofing offers thorough on-site inspections and true estimates of your roofing repair needs. WE are based in and only service Washington,DC- SO we specialize on working on these Beautiful Historic Homes we have here in the District.
"They couldn't have been more responsive or helpful. Customer satisfaction was clearly their top priority. It was literally some of the best customer service I have ever experienced! I could not recommend them more!"
Brent L on October 2020
With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!
"Extremely disappointed with this company. They do not stand by their guarantees. Did install shower in one day. Was not provided with the shower head I ordered. Calking and trim work was very sloppy. Went through the shower wall into my bedroom, did sparkle wall and left it. Shower doors have leaked and was finally told six months later that there is nothing they can do to correct the issue. Originally quoted $24,000.00 for the walk on shower, eventually agreed to $11,500.00. Completely dissatisfied with my shower. Once they get their payment, they are done."
Kathy B on June 2025
With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!
"Extremely disappointed with this company. They do not stand by their guarantees. Did install shower in one day. Was not provided with the shower head I ordered. Calking and trim work was very sloppy. Went through the shower wall into my bedroom, did sparkle wall and left it. Shower doors have leaked and was finally told six months later that there is nothing they can do to correct the issue. Originally quoted $24,000.00 for the walk on shower, eventually agreed to $11,500.00. Completely dissatisfied with my shower. Once they get their payment, they are done."
Kathy B on June 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
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
WHEN IT COMES TO ROOFING, WE HAVE YOU COVERED! OVER 28 YEARS OF EXPERIENCE! We are an award-winning top roofing installer, specializing in full replacement of Asphalt Shingle, Flat Roof, and Standing Seam Metal Roof Systems. With expert installation and high quality materials, we offier Lifetime-limited Warranties AND one of our superivors will be on site for your project from start to finish! We are also a premier dealer and installer for Solatube International, maker of the world-famous Solatube miracle skylight and Solarstar solar-powered attic fan. Solatubes are an affordable way to bring natural light into dark areas of your home - bathrooms, hallways, closets, kitchens – any areas that needs more light. Solatubes cost much less than conventional skylights, save on electric bills, are guaranteed not to leak, come with a 10-year warranty and are eligible for a 30% federal tax credit on parts and labor. Solatube's widely popular Solarstar attic fan literally pays for itself. It costs nothing to operate, installs in one hour, is guaranteed for 10 years and is also eligible for a 30 % federal tax credit. Save money and go Green with our wonderful products and services. We provide exceptional service to our clients and offer them with the best daylighting system in the world, America's number one selling solar attic fan and more. For additional information and to set up estimates and installations give us a call. We specialize in Solatube sales and installation, expert roofing repairs and replacements, and installing exceptional new gutters and gutter guards. Seeing is believing so please visit our beautiful new showroom, where we have a dozen exciting Solatube models on display. Contact us TODAY for your FREE estimate!!
"Fast on site response, expert recommendations, perfectly performed work. HIGHLY Recommended!!!"
Frederick M G on April 2023
WHEN IT COMES TO ROOFING, WE HAVE YOU COVERED! OVER 28 YEARS OF EXPERIENCE! We are an award-winning top roofing installer, specializing in full replacement of Asphalt Shingle, Flat Roof, and Standing Seam Metal Roof Systems. With expert installation and high quality materials, we offier Lifetime-limited Warranties AND one of our superivors will be on site for your project from start to finish! We are also a premier dealer and installer for Solatube International, maker of the world-famous Solatube miracle skylight and Solarstar solar-powered attic fan. Solatubes are an affordable way to bring natural light into dark areas of your home - bathrooms, hallways, closets, kitchens – any areas that needs more light. Solatubes cost much less than conventional skylights, save on electric bills, are guaranteed not to leak, come with a 10-year warranty and are eligible for a 30% federal tax credit on parts and labor. Solatube's widely popular Solarstar attic fan literally pays for itself. It costs nothing to operate, installs in one hour, is guaranteed for 10 years and is also eligible for a 30 % federal tax credit. Save money and go Green with our wonderful products and services. We provide exceptional service to our clients and offer them with the best daylighting system in the world, America's number one selling solar attic fan and more. For additional information and to set up estimates and installations give us a call. We specialize in Solatube sales and installation, expert roofing repairs and replacements, and installing exceptional new gutters and gutter guards. Seeing is believing so please visit our beautiful new showroom, where we have a dozen exciting Solatube models on display. Contact us TODAY for your FREE estimate!!
"Fast on site response, expert recommendations, perfectly performed work. HIGHLY Recommended!!!"
Frederick M G on April 2023
Specializing in new Metal Roofing! We work with local Amish crews to get your job done right. We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!
"They were excellent. They were on time. They were always polite."
Tracey B on December 2020
Specializing in new Metal Roofing! We work with local Amish crews to get your job done right. We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!
"They were excellent. They were on time. They were always polite."
Tracey B on December 2020
Paramount Builders takes pride in being your local home improvement contractor. Since 1991, we have served our local community by providing the very best products, warranties, installation techniques, service, and most importantly; your experience from start to finish. Our exclusive product lines give us the benefit of being able to extend our top-of-the-line products to you, our neighbors, with certainty and affordability. We hand-picked our exclusive products with you, your family, and your home's aesthetic and longevity in mind. All of our products were created to keep your home energy efficient and protected in every way. Our commitment to excellence does not waiver. We understand what it means to own a home, and we understand as professionals what you and your home deserve. We live each day by our mission statement; "Improving the Community, One Home at a Time," and thank you for continuing to trust us!
"Awesome Amazing job"
Karen H on May 2025
Paramount Builders takes pride in being your local home improvement contractor. Since 1991, we have served our local community by providing the very best products, warranties, installation techniques, service, and most importantly; your experience from start to finish. Our exclusive product lines give us the benefit of being able to extend our top-of-the-line products to you, our neighbors, with certainty and affordability. We hand-picked our exclusive products with you, your family, and your home's aesthetic and longevity in mind. All of our products were created to keep your home energy efficient and protected in every way. Our commitment to excellence does not waiver. We understand what it means to own a home, and we understand as professionals what you and your home deserve. We live each day by our mission statement; "Improving the Community, One Home at a Time," and thank you for continuing to trust us!
"Awesome Amazing job"
Karen H on May 2025
Paramount Builders takes pride in being your local home improvement contractor. Since 1991, we have served our local community by providing the very best products, warranties, installation techniques, service, and most importantly; your experience from start to finish. Our exclusive product lines give us the benefit of being able to extend our top-of-the-line products to you, our neighbors, with certainty and affordability. We hand-picked our exclusive products with you, your family, and your home's aesthetic and longevity in mind. All of our products were created to keep your home energy efficient and protected in every way. Our commitment to excellence does not waiver. We understand what it means to own a home, and we understand as professionals what you and your home deserve. We live each day by our mission statement; "Improving the Community, One Home at a Time," and thank you for continuing to trust us!
"Unprofessional visit. Showed up unannounced and we only knew they were there because one person stood 10 feet from our porch staring at us in through our living room window. My wife spent 10 minutes talking to them, they stated they had no business cards, they only had an appointment card but didn't present it. Honestly when you show up at someone's house you need some sort of identifier if your walking door to door in casual clothes. After the uncomfortable dead stare through the windows my wife and i have decided to post a No Solicitors sign. They didn't take no for an answer at first, pushing with more questions to circumvent the no she gave, as well as interrupted our dinner, as they showed up right at 6pm."
Robert H on May 2023
Paramount Builders takes pride in being your local home improvement contractor. Since 1991, we have served our local community by providing the very best products, warranties, installation techniques, service, and most importantly; your experience from start to finish. Our exclusive product lines give us the benefit of being able to extend our top-of-the-line products to you, our neighbors, with certainty and affordability. We hand-picked our exclusive products with you, your family, and your home's aesthetic and longevity in mind. All of our products were created to keep your home energy efficient and protected in every way. Our commitment to excellence does not waiver. We understand what it means to own a home, and we understand as professionals what you and your home deserve. We live each day by our mission statement; "Improving the Community, One Home at a Time," and thank you for continuing to trust us!
"Unprofessional visit. Showed up unannounced and we only knew they were there because one person stood 10 feet from our porch staring at us in through our living room window. My wife spent 10 minutes talking to them, they stated they had no business cards, they only had an appointment card but didn't present it. Honestly when you show up at someone's house you need some sort of identifier if your walking door to door in casual clothes. After the uncomfortable dead stare through the windows my wife and i have decided to post a No Solicitors sign. They didn't take no for an answer at first, pushing with more questions to circumvent the no she gave, as well as interrupted our dinner, as they showed up right at 6pm."
Robert H on May 2023
Elevate your home with Home Genius Exteriors, setting the standard in Maryland and Washington DC by offering full-service solutions for roofing, siding, windows, doors, gutters and insulation. We support our veterans and communities by supporting local and national charitable organizations through our Home Genius Cares initiative. With an Owens Corning® Platinum Preferred designation, we also offer flexible payment options, industry leading warranties and a wide range of premium products tailored for your home. It’s time for a different experience, entrust your next home project to a genius and schedule your free inspection today!
"I enjoyed the sales rep Chris a lot. He was very professional. Daniel’s crew worked thru extreme heat for 2 days to get the job completed and wasted no time at all. The project manager Dylan was good also, keeping me updated when needed. They did a great job with cleanup as well which was highly appreciated."
Arnita B on July 2025
Elevate your home with Home Genius Exteriors, setting the standard in Maryland and Washington DC by offering full-service solutions for roofing, siding, windows, doors, gutters and insulation. We support our veterans and communities by supporting local and national charitable organizations through our Home Genius Cares initiative. With an Owens Corning® Platinum Preferred designation, we also offer flexible payment options, industry leading warranties and a wide range of premium products tailored for your home. It’s time for a different experience, entrust your next home project to a genius and schedule your free inspection today!
"I enjoyed the sales rep Chris a lot. He was very professional. Daniel’s crew worked thru extreme heat for 2 days to get the job completed and wasted no time at all. The project manager Dylan was good also, keeping me updated when needed. They did a great job with cleanup as well which was highly appreciated."
Arnita B on July 2025