Reliable Modified Bitumen Roofing Systems for Commercial Properties

Commercial flat roof installation by 12 Stones Roofing & Construction in Pasadena, TX
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Commercial modified bitumen flat roofing system installed by 12 Stones Roofing & Construction in Houston, TX

Modified Bitumen Roofing Services

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Modified Bitumen roofing is a trusted solution for low-slope and flat roofing applications. It merges the traditional strength of built-up asphalt with modern flexibility and weatherproofing, making it a smart choice for commercial buildings requiring long-term durability.

At 12 Stones Roofing & Construction, we specialize in Modified Bitumen roof installations, repairs, and maintenance. Our certified crews bring years of experience and a deep understanding of what makes these systems last, especially under the intense sun, seasonal storms, and high humidity that define Gulf Coast climates.

Why Choose Modified Bitumen?

Modified Bitumen roofing offers the ideal balance of performance, longevity, and adaptability.

Key Benefits of Modified Bitumen Roofing

  • Multi-Layered Waterproofing
    This roofing system is built with multiple layers of asphalt-reinforced material, providing excellent resistance to moisture and ponding water on flat or low-slope roofs.
  • UV and Heat Resistance
    When paired with a reflective coating, Modified Bitumen reflects UV rays and lowers rooftop temperatures, extending membrane life and helping reduce cooling costs.
  • Flexible Installation Options
    Choose from torch-applied, cold-adhesive, or self-adhered systems based on your building’s safety, use case, and budget. Each method delivers a seamless, watertight finish.
  • Durability Under Pressure
    The membrane resists punctures, foot traffic, and rooftop equipment stress. It’s an excellent choice for commercial properties with rooftop HVAC systems, solar panels, or frequent service access.
  • Repairability and Lifespan
    With a lifespan of up to 20 years, Modified Bitumen can be easily repaired to extend service life. When compared to full roof replacements, patching seams and coating renewals provide major long-term savings.

Want to compare with other materials? Visit our commercial roofing services page.

roofing

Full job site aerial view of a professional residential roof replacement by 12 Stones Roofing & Construction in Pasadena TX
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Our Services

Our crews are trained in the latest safety protocols, material handling, and installation techniques. Each member is vetted, insured, and committed to getting the job done right the first time. We frequently complete OSHA-certified safety training and maintain up-to-date manufacturer certifications.

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Comparing Modified Bitumen to Other Roofing Types

Feature

Modified Bitumen

TPO Roofing

EPDM Roofing

UV Protection

High (with coating)

High

Moderate

Waterproofing

Excellent

Excellent

Good

Energy Efficiency

Moderate to High

High

Low

Lifespan

20+ years

15–20 years

20–30 years

Repairability

Easy

Moderate

Moderate

Installation Versatility

Torch, Cold, Self-Adhered

Welded/Adhered

Adhesive/Ballasted

For detailed comparisons or a hybrid system recommendation, visit our flat roofing page.

Tailored Installation for Long-Term Results

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Every commercial roof has different challenges. We approach each Modified Bitumen project with care and precision to ensure lasting performance.

Our Installation Process

  1. Detailed Roof Inspection
    We start with a roof inspection to evaluate the deck, slope, insulation needs, and current condition of your roofing system.
  2. Surface Preparation
    We clean and prime the substrate, repair any weak spots, and ensure the structure is ready for new material.
  3. Insulation and Base Layer
    We install high-R-value insulation to improve thermal performance, followed by a reinforced base sheet.
  4. Membrane Application
    Depending on your project, we use one of three methods:

    • Torch-down: Heated seams for strength and fast installation.
    • Cold-applied adhesive: No flames, safer for occupied buildings.
    • Self-adhering membrane: Quick, clean, and efficient.
  5. Sealing Details and Edges
    We flash penetrations, parapet walls, and terminations using proper sealants and detail work to prevent leaks.
  6. Reflective Coating (Optional)
    For energy efficiency, we apply a reflective surface. According to the U.S. Department of Energy, cool roof coatings can lower rooftop surface temperatures by up to 50°F.
  7. Final Walkthrough & Warranty
    We inspect every detail and provide documentation, including warranty coverage and care instructions.

For new construction or roof replacement, visit our roof installation page for details on full-system installs.

Modified Bitumen Roofing in Pasadena

Modified bitumen systems are built for low-slope and commercial applications, but their performance still depends on proper installation and attention to vulnerable areas. Seams, edges, penetrations, and drainage points can all deserve closer evaluation when a problem develops. 12 Stones Roofing & Construction brings a thorough, detail-focused approach to modified bitumen roofing in Pasadena, helping property owners understand the condition of their roof and the work needed to address it.

Why Choose 12 Stones Roofing & Construction​

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Maintenance Tips for Maximum Lifespan

Modified Bitumen is low-maintenance by design, but scheduled care can add years to its performance.

Maintenance Checklist

  • Twice-Yearly Inspections
    Seasonal checks help spot seam damage, surface wear, and water pooling early. Our roof maintenance checklist outlines what to look for.
  • Coating Reapplication
    If your system has a reflective coating, we’ll assess wear and recommend reapplication every few years to maintain UV protection.
  • Drainage and Debris Control
    Clogged drains or leaf buildup can cause water intrusion. Regular cleanings prevent costly damage.
  • Quick Repairs for Small Issues
    Our roof repair team can patch splits, reseal flashings, or re-torch seams to avoid full roof failure.

Need to secure the site quickly after a storm? Our 24/7 emergency roofing services include roof tarping to prevent further damage.

Where Modified Bitumen Performs Best

This roofing system is best suited for:

  • Industrial and Warehouse Roofs
    High durability and heat resistance make it ideal for facilities with heavy rooftop equipment.
  • Retail Centers and Shopping Plazas
    Modified Bitumen is reliable under foot traffic and easy to repair, reducing business interruptions.
  • Medical, Government, and Schools
    With cold-applied options, installation is low-odor and safe for sensitive environments.
  • Multi-Family Residences
    Apartment complexes and condos benefit from leak-resistant membranes and long-term dependability. Learn more on our multi-family roofing page.

Schedule a Free Estimate

Whether you’re replacing a failing flat roof or starting a new construction project, Modified Bitumen is a dependable, long-term solution. Our team at 12 Stones Roofing & Construction is here to guide you from inspection to final walkthrough.

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Testimonials

What they’re saying about us

4.9★★★★★
Excellent
Based on 119 reviews

✦ What customers say

Customers most often say 12 Stones comes out fast, often the same or next day, inspects the roof thoroughly and finishes a full replacement in a single day with the yard left spotless. Many reviewers describe help getting an insurance claim approved after a denial, with the team meeting adjusters and handling the paperwork, and call the pricing fair. Pasadena and Houston-area homeowners also name Clayton, Clark, Billy, Bryce and David, and mention that the company is veteran-owned and faith-based.

Insurance claim help One-day replacements Fast inspections Spotless cleanup Fair pricing Veteran-owned Siding & construction Clear communication

AI-generated summary of customer reviews, updated October 9, 2026.

Adam Clarke
Oct 2026 · Google
★★★★★

I truly can’t express how much of a lifesaver these guys were for me. They took on an incredibly challenging foundation job, and…

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…their crew tackled it with remarkable efficiency, professionalism, and attention to detail. In no time, they had the work completed and the place looking fantastic. From the attentiveness and communication of the sales team to the exceptional quality of the workmanship, the entire experience exceeded my expectations. It’s rare to find a company that delivers on every level like this one did. If I could give them six stars, I absolutely would! I can’t recommend them highly enough.

Yvette Brewer
Oct 2026 · Google
★★★★★

These people are amazing and veterans as well 💙🇺🇸🇺🇸

Casey Clark
Sep 2026 · Google
★★★★★

Working with 12 Stones was just a fantastic experience. Billy listened to and checked out every single concern I had with my…

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…roof. The estimate was timely and seemed like a fair and good price. Everyone that worked for the company showed up on time and fixed my issues the correct way. I'm a perfectionist and they met my expectations. They went above and beyond to make sure that all the issues I had originally called them about were fixed. I definitely recommend this company as being very trustworthy and easy to work with.

Andrea B
Sep 2026 · Google
★★★★★

Through a series of somewhat unfortunate events, we discovered a hole in our roof on a Wednesday afternoon. I called 12 Stones…

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…Roofing to schedule an inspection/repair quote and Clark was at my door early the very next morning. He did a thorough inspection with his aerial drone and physically climbed on the roof to verify the extent of damage. He took pictures and explained in detail what he found. Clark then went back to the office and the 12 Stones Roofing team put together an incredibly fair and reasonable quote for the repair job. I scheduled them to come out the following Tuesday. Clark and his team did such an amazing job! They spent four hours in the hot August sun fixing my roof. Once they completed their work, they meticulously tidied up. There was absolutely no trace of discarded roofing material or stray nails anywhere to be found in my yard. I honestly could not have asked for a better experience. I hope not to need roofing work again any time soon, however, I will absolutely be calling Clark at 12 Stones Roofing for any and all of my future roofing needs.

Amanda Sanders
Aug 2026 · Google
★★★★★

Outstanding Experience with 12 Stones Roofing!

I had an excellent experience with 12 Stones Roofing from start to finish! The…

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…entire team was professional, timely, and incredibly clean throughout the project. The quality of the work was outstanding, and they took great care to make sure everything was done right.

The project manager and customer service team were exceptional. They communicated consistently, checked in throughout the process, and made sure I was completely satisfied every step of the way. That level of communication and attention to quality really made a difference.

The pricing was also extremely competitive, especially considering the level of service and quality I received. And as a really cool finishing touch, they sent me drone photos of the completed roof afterward — such a great way to see the finished project!

I highly recommend 12 Stones Roofing to anyone looking for a roofing company that is reliable, professional, communicative, and truly cares about doing quality work. They made the entire process easy and exceeded my expectations!

Letetia Guidry
Aug 2026 · Google
★★★★★

I'm interested in having a sidewalk poured on the side of my home to my back patio. David came out did all the measurements and…

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…gave me a price that can't be beat. His professionalism is great I will be doing more business with him in the near future.
Thanks David!
llg

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Rezki Harianto
Aug 2026 · Google
★★★★★

I had a great experience with 12 Stones Roofing and Construction and am very pleased with the completed work. Clark and Thomas…

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…did an excellent job keeping me updated and informed throughout the entire process, which I really appreciated.

The entire team was professional, efficient, and did a great job completing the work in a timely manner. From start to finish, the process was smooth and a positive experience.

I would definitely recommend 12 Stones Roofing and Construction and will keep them in mind for any future roofing or construction needs.

Cathi Wofford
Aug 2026 · Google
★★★★★

12 Stones Roofing & Construction was professional, punctual, clean,…

Read more

…reliable and efficient. The crew showed up on time, worked quickly, left the site spotless and answered all my questions. I felt confident in the roof repair they did and would definitely recommend them to anyone looking for a roofing contractor. Great job. When we encountered questions with the finance company 12 Stones quickly and without complaint worked with us to solve the issue. I would definitely recommend 12 Stones Roofing to anyone. Ask for The Roofing Pastor!

Photo from Cathi Wofford's reviewPhoto from Cathi Wofford's reviewPhoto from Cathi Wofford's review
Tim Smith
Jul 2026 · Google
★★★★★

When the car came through our house we didn't know what to do. David…

Read more

…came and got us back to normal. David went above and beyond to keep us on track and give me my house back. I can't recommend 12 stones enough. 1w stones will be the only company I use for any problems or renovations.

Photo from Tim Smith's reviewPhoto from Tim Smith's reviewPhoto from Tim Smith's reviewPhoto from Tim Smith's review
Jim Keith
Jul 2026 · Google
★★★★★

Scott Easterwood and Billy Bernhard both met with myself and my wife regarding replacing the roof on our home. They were quite…

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…knowledgeable and professional and offered an opportunity to save somewhat by using a shingle that they had access to of the same grade and quality, but which had been misdelivered to another part of their organization. The crew did an excellent job in one day from arrival about 6:30 to departure about 6:45 with total cleanup and the job complete.

Maria Pedraza
Jul 2026 · Google
★★★★★

I had my roof replaced today. I must say I am very pleased and happy with the outcome. They did an excellent job! The crew was…

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…professional, efficient and kept the work are very clean. Billy Bernhard, Sales Manager, was very professional, pleasant and explained everything so well. Thonas Phan, Quality Control Manager, also was professional and went over a few things as well. I also had the pleasure to speak with the owner , John, he was so helpful and answered all of my concerns. I highly recommend 12 Stones Roofing & Construction. Trust me, you will not be disappointed. Thank you all so much! May God bless each and everyone of you.

Geneva Rice
Jun 2026 · Google
★★★★★

Billy Bernhard and 12 Stones Roofing & Construction exceeded every expectation!
When we put our home up for sale, we hired Billy…

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…Bernhard and 12 Stones Roofing & Construction to replace the roof, and we couldn't be more pleased with the results. From start to finish, the quality of their work was outstanding. The craftsmanship was top-notch — everything was done with care, precision, and real attention to detail.
What truly set them apart was their ability to go above and beyond. When additional issues were identified that needed attention, Billy didn't skip a beat — he coordinated skilled contractors to make sure everything was handled properly and up to standard. That kind of dedication is hard to find, and it gave us tremendous peace of mind.
Thanks to Billy and 12 Stones Roofing & Construction, our home was in very good condition when it sold. If you're looking for a roofing company that delivers quality work and takes care of their customers from beginning to end, look no further. We highly recommend them and would not hesitate to use them again!

Trey Thompson
Jun 2026 · Google
★★★★★

After noticing a leak, we contacted 12 Stones Roofing and Construction. They came same day. David was extremely friendly and…

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…helpful. Thoroughly investigated the roof and immediately went to work solving the issue. This is the company to go to for all your roofing and construction needs.

Angie Thatcher
Jun 2026 · Google
★★★★★

So impressed with the work, the professionalism, and the speed! The price is fair for the quality and working with the entire…

Read more

…team is always a great experience. I would recommend them to anyone looking for a roofing contractor. They are honest, dependable, and professional. I have used them for multiple projects at my home including roofing, hardiplank siding, painting, concrete work, and building a portico at my front door. I have them on deck for my next project already. They are the first people I call when I need any home construction done.

Brian Flores
May 2026 · Google
★★★★★

I recently hired 12 Stones Roofing and Construction for a roof replacement and was extremely impressed with the professional. The…

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…crew arrived on time, explained the process clearly, and kept the work site clean. Top 3 things I loved: 1) Friendly service 2) High quality workmanship 3) Competitive pricing. I would definitely recommend this roofing contractor to anyone looking for reliable roof repair or roof installation.

Ed Kangas
May 2026 · Google
★★★★★

For us, retired and on a fixed income, the decision to replace our 25 year old vinyl siding was a economical one ...Clayton at…

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…12 Stones sharpened his pencil and gave us an estimate that we could handle! It was a delight to watch the daily progress of the crew, steady working, craftsmen in their trade...The difference that their quality workmanship made in our home's appearance is so nice to see! We are totally delighted and strongly urge everyone to consider this company for all of your projects! Thank you 12 Stones!

Amber Toll
Apr 2026 · Google
★★★★★

Bryce was fantastic to work with from start to finish. He was honest, responsive, and took the time to explain everything…

Read more

…clearly. The roofing work was done efficiently and with great attention to detail. He also offers a Diamond Warranty, which gave me extra peace of mind knowing the coverage goes beyond the standard and really protects the investment. It’s hard to find someone this reliable these days—I highly recommend Bryce to anyone needing roofing services.”

Taylor Murray
Apr 2026 · Google
★★★★★

I hired 12 Stones Roofing and Construction for a roof repair and was impressed by how professional, punctual, clean, reliable and…

Read more

…efficient the crew was. They arrived on time, kept the site tidy, and completed the job quickly with great attention to detail. The pricing was fair and the communication was clear. I would definitely use them again and recommend them as a top roofing contractor.

Stephanie Wollam
Apr 2026 · Google
★★★★★

Very punctual, professional and willing to help. Very open communication C. Long is always available day or night. Very…

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…transparent and honest company. Would recommend for any housing projects. Great work and workers.

Christy Bownds
Apr 2026 · Google
★★★★★

Trustworthy company that does quality work

Tyler Terry
Apr 2026 · Google
★★★★★

12 Stones Roofing and Construction was professional, punctual, clean, reliable and efficient. They completed our roof repair…

Read more

…quickly and left the site spotless. Highly recommend this roofing contractor.

betty dobbins
Apr 2026 · Google
★★★★★

I’m not even sure where to start. Speaking from firsthand experience. At first I was very nervous about hiring anyone, my husband…

Read more

…was a licensed plumber and contractor, he is the only one to ever do any kind of work to our home. A stroke left I’m blind and with memory loss. Which means, I have to do everything on my own. Well in this case I was not alone. These gentlemen were so kind and helpful, Christian and caring. They did an AMAZING JOB!!! Replacing the roof, new decking a solar panel and a new fence. I believe I now have the most beautiful roof in my neighborhood!!! Just call them💕🙏🏼

Robert Davidoski
Apr 2026 · Google
★★★★★

Amazing staff, I spoke with a Mr. Grady Crow about my problems and he had solutions and assured me it would be done right and for…

Read more

…a good price too, its nice to find a company with real people and good principles

Ike's Art Studio
Apr 2026 · Google
★★★★★

I had a great experience working with 12 Stone Construction. The team was professional, reliable, and delivered quality work from…

Read more

…start to finish. Communication was clear throughout the process, and everything was completed on time. I’m very happy with how everything turned out and would definitely recommend them to anyone looking for a dependable construction company.

Laura Flores
Mar 2026 · Google
★★★★★

I was over overwhelmed with the courtesy and the knowledge of the staff. The process of everything went so smoothly from…

Read more

…beginning to end everybody was so courteous and giving and and just a great bunch of people to work with.

Anthony Acosta
Mar 2026 · Google
★★★★★

Talked to Mr. Grady Crow, I look forward to doing business with him in the future! He's a natural at his craft, very knowledgeable, and professional! 12 Stones is the way to go!

Wildflyer UAV
Jul 2024 · Google
★★★★★

Excellent company...super professional in all aspects of the process.…

Read more

…Highly recommend! Neighbors expressed appreciation for how well tear off went …cleaned up throughout.
Close attention to details supporting the insurance claim as well as planning/scheduling the work. The crew, led by Joel, was amazing to watch perform roof work replacement in 1 day as planned for a complex roof. Great work cleaning up also.

Photo from Wildflyer UAV's reviewPhoto from Wildflyer UAV's reviewPhoto from Wildflyer UAV's reviewPhoto from Wildflyer UAV's review

Frequently Asked Questions

What is Modified Bitumen roofing made of?

Modified Bitumen is a type of asphalt roofing reinforced with either APP (atactic polypropylene) or SBS (styrene-butadiene-styrene) polymers. These materials enhance elasticity, waterproofing, and UV resistance, perfect for handling the extreme heat and seasonal rains we get in Pasadena.

In the Pasadena area, a properly installed Modified Bitumen roof can last 20 years or more with routine maintenance. Factors like UV exposure, foot traffic, and debris buildup can affect its lifespan, which is why regular inspections are key.

Absolutely. Modified Bitumen is engineered specifically for flat and low-slope roofing systems. It offers strong protection against standing water, punctures, and thermal expansion—making it ideal for warehouses, retail buildings, and multi-family structures throughout Harris County.

SBS-modified bitumen is more flexible and performs better in cold weather, while APP-modified bitumen offers greater UV resistance and durability in heat. In Pasadena’s hot, humid climate, we typically recommend APP-modified systems paired with reflective coatings to reduce rooftop temperatures.

In many cases, yes. If the existing roof is in good structural condition, Modified Bitumen can be applied as an overlay. However, a roof inspection by our team is essential to determine if this is a safe and code-compliant option.

On average, the cost ranges from $5 to $9 per square foot, depending on the system (torch-down vs. self-adhered), insulation needs, and roof complexity. We provide transparent, itemized estimates as part of our free roof installation consultations.

Yes, especially when paired with a reflective coating. These “cool roof” systems can lower indoor temperatures by 10–15°F, reducing strain on your HVAC system during our intense Texas summers. The U.S. Department of Energy recognizes Modified Bitumen with cool roof coatings as an energy-efficient option.

Routine maintenance includes debris removal, checking seams and flashings, and resealing any cracked areas. We recommend twice-yearly inspections, especially after storm season. You can follow our roof maintenance checklist or let our team handle it with a custom maintenance plan.

Get in Touch with Us

12 Stones Roofing & Construction

6933 Olson Ln, Pasadena, TX 77505

(832) 815-9463

Monday: Open 24 hours
Tuesday: Open 24 hours
Wednesday: Open 24 hours
Thursday: Open 24 hours
Friday: Open 24 hours
Saturday: Open 24 hours
Sunday: Closed

Read Our Reviews on Google

Top down drone view of a complex hip and valley roof replacement project by 12 Stones Roofing & Construction in Pasadena TX

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