- 11121 Industrial Rd, Manassas, VA 20109
- Financing Available
- Licensed & Insured
- Warranties Offered
- Metal Roof
- Slate Roof
At Simpson Unlimited, we pride ourselves on our versatility and technical expertise, capable of handling both residential and commercial projects with ease. Located in Manassas, Virginia, we specialize in roof replacement, emergency roof repair, and roof waterproofing. Our comprehensive approach allows us to manage complex projects from start to finish, ensuring that every detail is meticulously addressed. Our commitment to organization and consistency in our work sets us apart in the industry.
We understand that each project requires a tailored strategy, and our well-coordinated team is dedicated to delivering durable, high-quality results that provide long-term value. From the initial consultation to the final inspection, we focus on ensuring that every aspect of your roofing needs is met with precision. Serving Manassas and the surrounding regions, we are recognized for our industry-standard reliability and our ability to complete intricate jobs thoroughly, making us a trusted choice for all your roofing requirements.
Customer feedback for Simpson Unlimited is overwhelmingly positive, highlighting their excellent workmanship, professionalism, and reliable communication. Many reviewers commend the company's ability to resolve long-standing roofing issues without callbacks, indicating a high level of satisfaction with the quality of work performed. Additionally, prompt and clear communication regarding pricing and project timelines has been consistently praised. Customers appreciate the integrity shown during projects, often noting that the company does not try to upsell unnecessary services. Overall, customers feel confident in their choice to work with Simpson Unlimited for their roofing needs.
- Their professionalism, honesty and knowledge of the project made my job of owner rep a truly rewarding experience.
- The quality of work was excellent.
- They are always prompt with their pricing when a job requires a pre-approval.
- Simpson is always very responsive and helpful.
- Top-shelf customer service and a job incredibly well done.
Customers are fully satisfied

I use these guys for all my roof repairs at multiple bldgs. and they are the best. Very reasonable pricing as well.

Once upon a time my neighbor started this company. Some of the best lessons where given. Today I myself have a successful business and because of owners like him I met along the way I have made a quality company. Hire this company. This guy runs a tight ship and you'll have the best work.

Simpson Unlimited, Inc. Installed our roof at 8101 Connecticut Avenue. The project consisted of 175 unit, three seven story buildings and was completed less than a year ago. The three and a half million dollar contract was completed on time, on budget, and passed county inspection
as soon as it was ready for final inspection. There were a number of instances where Simpson could have taken advantage of extras but did not. Their professionalism, honesty and knowledge of the project made my job of owner rep a truly rewarding experience. The team of Matt Stromberg, Carlos, the general superintendent and Larry the specialty foreman as well as a strong accounting department made for a winning combination. Too bad I won't be around in forty years to do it over again.
Bob Shaffer, Treasurer
8101 Condominium Associates
- 11121 Industrial Rd, Manassas, VA 20109
- Financing Available
- Licensed & Insured
- Warranties Offered
- Metal Roof
- Slate Roof
The average roof replacement cost for a residential home typically ranges from $7,000 to $15,000, depending on factors such as roof size, chosen materials, roof pitch, and labor rates in your area. Premium materials or complex designs may increase the price.
The cost to replace the roof of a commercial building typically ranges from $5 to $12 per square foot, depending on several factors such as roof size, material, labor rates, building type, and local code requirements.
Several factors influence roof repair cost, including the extent of the damage, roof accessibility, material type, labor costs, and whether it’s a general repair or an emergency fix. Minor repairs can start around $150–$400, while major repairs may exceed $1,500.
Roof leak repair cost generally ranges from $300 to $800, depending on the size and location of the leak, the materials required, and labor intensity. Complex leaks involving structural repairs or interior damage will cost more.
Flat roof repair cost for commercial properties usually ranges from $500 to $3,000, depending on the roofing material (TPO, EPDM, PVC), the extent of the damage, and roof accessibility.
Mobile home roof replacement cost typically ranges from $3,000 to $8,000, making it generally more affordable than traditional home roof replacements, due to smaller size and simpler structure.
It's not necessary to stay home during roof replacement. Roofing work is noisy and can cause vibrations inside the house, which might be uncomfortable. Most homeowners choose to leave during major parts of the project, but our team ensures safety and keeps you updated, whether you're home or not.
The timeline for a roof replacement typically ranges from one to three days, depending on the size and complexity of the roof, weather conditions, and material type. Larger or more intricate roofs may take a bit longer, but we always aim for efficient, timely completion.
To hire a roofing contractor, start by researching local companies with good reviews and proper licensing. Request quotes from multiple contractors, verify their insurance and certifications, and ask for references. Always ensure you get a written contract that outlines the scope of work, timeline, and payment terms.
Check if a roofing company is legit by verifying their business license, insurance, and local certifications. Look for memberships in professional associations, read customer reviews, and ask for recent project references. A legitimate company will be transparent and provide all documentation upon request.
When choosing a roofing company, consider their experience, customer reviews, warranty offerings, and quality of materials. Make sure they provide clear communication, detailed estimates, and a solid portfolio of completed projects. Local expertise is also a major advantage for understanding regional roofing needs.
Warning signs that your roofing contractor might be ripping you off include vague contracts, pressure to pay large upfront deposits, lack of proper documentation, and unexplained price increases. Always ask for itemized estimates and written guarantees, and avoid contractors who avoid answering your questions directly.