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Commercial Modified Bitumen Roofing

Don’t let ponding water turn into a structural deck problem.

Our roofing crews install torch-applied and cold-adhesive SBS modified bitumen systems engineered for Houston’s low-slope commercial roofs, heavy seasonal rainfall, and intense summer heat.

Multi-ply redundancy leads to a roof that survives Houston's ponding water, providing long-term protection.

Signs Your Commercial Modified Bitumen Roof Needs Attention

Ponding Water That Won't Drain

Water pooling on your low-slope roof more than 48 hours after rain accelerates membrane breakdown and signals a drainage or ply failure that needs inspection.

Blistering or Cracking Cap Sheet

Houston's UV exposure and summer heat can blister or crack the granule-surfaced cap sheet, exposing the base sheet underneath to moisture

Lifting Seams or Pulled Flashing

Torch-welded seams that lift at the edges or flashing separating from parapet walls are early warning signs of failure before an indoor leak appears.

Our Proven Installation Process

Built to Handle Houston's Flat-Roof Drainage Challenges

✔ Flood-testing and deck inspections to identify ponding and moisture damage before any work begins
✔ Transparent, no-obligation replacement estimates specifying ply count and application method
✔ SBS modified bitumen systems with reflective cap sheet options suited to Houston’s cooling season

We don’t just torch down a cap sheet — we correct drainage and flashing details so your roof performs through Houston’s heaviest rain seasons, not just the dry months.

Emergency Response for Commercial Roof Leaks

Fast, Reliable Leak Mitigation When Storms Strike Houston

Severe Houston storms and sudden membrane failures don’t wait for convenient business hours. We offer prompt commercial roofing service to secure your property and stop active leaks.

✅ Rapid response to mitigate active leaks on low-slope commercial roofs
✅ Emergency membrane patching to prevent further interior and inventory damage
✅ Seamless documentation and assistance for your commercial insurance claim

Why Choose Achilles for Your Modified Bitumen Roof?

Houston Commercial Roofing Specialists

✔ Locally owned and operated in Houston since 2017
✔ Bonded and insured roofing contractors, RCAT Member #208834
✔ Backed by a 5-year workmanship warranty on every commercial installation

Don’t trust your commercial property to storm chasers. Ahmad Faiz and the Achilles Roofing & Exterior team specify and install modified bitumen systems built specifically for Houston’s flat-roof conditions.

Common Questions About: Commercial Modified Bitumen Roofing

What’s the difference between SBS and APP modified bitumen?

SBS (styrene-butadiene-styrene) modified bitumen is rubberized and stays flexible across Houston’s temperature swings between humid summers and occasional winter freezes. APP (Atactic Polypropylene) bitumen is more heat-resistant during application but can become brittle sooner. We install SBS systems on most Houston commercial roofs for that flexibility.

How many plies does a commercial modified bitumen roof need?

Most Houston commercial systems use two plies — a base sheet and a cap sheet — though buildings with a history of poor drainage or added wind-uplift requirements may need a third interply sheet for redundancy.

Can modified bitumen be installed over an existing roof, or does it require tear-off?

A re-cover is possible if the existing membrane and insulation are dry and structurally sound. If moisture is found in the insulation during inspection, a full tear-off to the deck is required to avoid trapping wet insulation under new material.

Is torch-applied modified bitumen safe on an occupied building?

Torch application uses an open flame, so we often switch to cold-adhesive or self-adhered systems on occupied buildings or near flammable insulation, where flame exposure is a fire-code concern.

How do I know if my flat roof has a ponding water problem?

Look for standing water more than 48 hours after rain, dark staining or algae growth in low spots, or a spongy feel underfoot. Houston’s flat commercial roofs are especially prone to this as tapered insulation compresses over 10-15 years.

What causes blisters or bubbles in a modified bitumen membrane?

Blisters form when trapped moisture or air between plies expands under Houston’s summer heat, pushing the membrane up into a bubble. Left alone, foot traffic or thermal cycling can rupture the blister and expose the base sheet.

Will hail damage a modified bitumen roof?

Hail can bruise or fracture the granule-surfaced cap sheet without an obvious leak showing up right away, which is why post-storm inspections matter for Houston commercial properties.

How long does a commercial modified bitumen replacement take?

Timeline depends on square footage, tear-off scope, and weather windows, since both torch and adhesive application require dry conditions. Smaller sections can finish in a few days; larger roofs may take one to two weeks.

Does Achilles Roofing offer financing for commercial modified bitumen projects?

Yes, GreenSky financing is available with payments as low as $199 per month, subject to approval, plus a $500 Visa gift card referral program and a $150 discount off replacements for senior, military, veteran, or disabled property owners.

What warranty comes with a modified bitumen roof replacement?

Achilles Roofing backs commercial modified bitumen installations with a 5-year workmanship warranty, separate from any manufacturer material warranty on the membrane itself.

How much does commercial modified bitumen roofing cost in Houston?

Commercial modified bitumen replacement starts at $20,000 for smaller low-slope buildings, with total cost driven by square footage, tear-off requirements, deck repairs, and whether tapered insulation is added for drainage.

Can modified bitumen roofing be repaired instead of fully replaced?

Localized seam failures, isolated blisters, or flashing leaks can often be repaired starting at $300 rather than requiring full replacement, provided the underlying insulation hasn’t been compromised by long-term moisture.

General Company & Process FAQs

About Achilles Roofing & Exteriors

  • Are you a licensed and insured local roofing company?

    Yes. Achilles Roofing is fully licensed, bonded, and insured in the state of Texas. We are a locally owned and operated company based in Houston, proudly serving homeowners across Houston and all surrounding areas. Our commitment is to our community, and we stand by the quality and safety of every project we undertake.

  • Can I see examples of your past work or speak to previous clients?

    Absolutely. We are proud of our work and have an extensive portfolio of before-and-after project galleries. We are also happy to connect with previous clients in the Houston area who can speak to their experience with our team

  • What makes Achilles Roofing different from other Houston roofers?

    We’re roofers, not just salesman. Our reputation is built on honest work, transparent communication, and treating every Houston family we work with like our own. We focus on providing the right solution for your home and budget, backed by robust warranties and a commitment to exceptional craftmanship.

  • Do you use subcontractors for your roofing projects?

    No. We believe in accountability and consistency quality, which is why your roof is installed by our own trained, in-house Achilles Roofing crews. We don’t outsource our work, ensuring that every project meets our high standards from start to finish.

  • How long have you been in business?

    Our leadership team has decades of combined experience in the Texas roofing and storm restoration industry. As a company, we have succesfully completed hundreds of roof replacement and repairs in Houston neighborhoods, building a strong reputation for quality and reliability.

Pricing, Estimates & Financing

  • What’s your emergency tarp fee?

    $300 minimum for a 5×5 area, covering emergency leak protection until permanent repairs begin.

  • Do you replace skylights?

    Yes. Velux skylight replacement is $2,000, double dome is $1,500, and labor/installation-only is $600. All skylight work carries a 5-year labor warranty.

  • How much does shingle roofing cost per square?

    GAF HDZ runs $127.50/square, GAF NS is $109/square, and OC Duration is $127/square. Pricing varies by roof size and complexity — call (832) 888-1666 for a free estimate.

  • What roofing packages does Achilles Roofing offer?

    Three tiers: Good (Builder Grade shingles, 2-year labor warranty, no material warranty), Better (GAF NS shingles, 5-year labor warranty, manufacturer material warranty), and Best (GAF UHDZ shingles, 10-year labor warranty, enhanced manufacturer warranty). Call (832) 888-1666 to find the right fit for your budget.

  • How much does a new roof cost in Houston?

    The cost of a new roof is a significant investment, and the final price depends on several factors, including the size, pitch (steepness), and complexity of your roof, as well as the specific materials you choose. 

    While every home is unique, we want to provide some general price ranges for a typical 1,500 sq. ft. home in the Houston area to help you budget:

    • Architectural Shingles (Most Popular): $5,500 – $8,500
    • Impact-Resistant/ Designer Shingles: $9,000 – $14,000+
    • Standing Seam Metal Roof: $15,000 – $25,000+

    For a More Accurate Quote: Get Your Instant Estimate Now

    These are ballpark estimates for planning purposes only. The best way to get a precise and instant quote for your specific property is to use our free instant estimator tool. It uses advanced satelite imagery to measure your roof and provide a detailed, accurate estimate for your replacement and installation.

  • Do you offer financing options?

    Yes, we make it easy to get the roof you need now with the affordable and flexible financing. We have partnered with Greensky® Financing, a leader in home improvement loans, to offer our customers excellent payment options. Through this partnership, qualified homeowners can get a brand-new roof with $0 Down and low monthly payments, starting at just $199/month.

    This program allows you to protect your home immediately without the stress of a large upfront payment. You can learn more about the benefits and get pre-qualified in minutes on our financing page.

    Learn More About Greensky® Financing.

  • What is included in your roofing estimate?

    We believe in 100% transparency. Every written estimate from Achilles Roofing includes a detailed breakdown of all costs, including materials, labor, tear-off and disposal of the old roof, and thorough site cleanup, You will also receive clear start and completion timelines, payment schedules, and full warranty details. There are no hidden fees.

The Roofing Process

  • How will you communicate with me during the project?

    We believe in constant communication. You will be assigned a dedicated project manager who will be your single point of contact. They will provide daily updates, including photos and progress reports, and are always available to answer your questions via phone call or text.

  • How do you protect my home and property during the installation?

    Your property’s protection is a top priority. Our crews use heavy-duty tarps and protective boards to cover your landscaping, windows, AC units, and driveway. We conduct a thorough cleanup at the end of each day and use magnet sweeps to collect any stray nails or metal debris, leaving your property spotless.

  • Do you handle city permits and inspections?

    Yes, we manage the entire process for you. This includes pulling all necessary permits with the City of Houston or your local jurisdiction and scheduling the final inspection upon completion. We ensure your new roof is fully complaint with all local building codes and manufacturer standards.

Materials & Warranty

  • Do you install attic or roof vents?

    Yes — we install Attic Breeze and Remington Solar vent systems for improved attic ventilation and energy efficiency.

  • What shingle colors are available?

    Builder Grade comes in Brown, Gray, or Black. GAF shingles offer Slate, Weathered Wood, Charcoal, Barkwood, Mission Brown, Hickory, and Pewter Grey.

  • Why do different roofing options have different prices and warranties?

    Your roof is a complete system, and the materials you choose play the biggest role in it’s long-term performance, durability, and the level of protection you receive. We offer several options to ensure we can provide the perfect solution for every home and budget.

    • Standard Achitectural Shingles offer excellent value and protection, backed by our 5-year workmanship warranty and solid manufacturer warranties. 
    • Premium GAF System often include impact-resistant technology and come with enhanced, non-prorated warranty coverage for the ultimate peace of mind.

    During your free assessment, our team will walk you through the specific benefits of each option, helping you choose the right balance of performance, longevity, and price for your situation.

  • What are the best roofing materials for the Houston climate?

    Houston’s unique combination of intense sun, high humidity, and severe storms demands durable and well-ventilated roofing systems. We typically recommend:

    • Impact-Resistant Shingles: These are designed to withstand hail and high winds, which can often lead to insurance discounts. 
    • “Cool Roof” Shingles: These reflective shingles can lower your roof’s temperature, reducing your energy bills during hot Texas summers.
    • Proper Attic Ventilation: This is critical in our humid climate to prevent moisture buildup and extend the life of your entire roofing system. We always ensure your ventilation is up to code.
  • What kind of warranties do you offer?

    We provide a powerful, dual-layer warranty system to give you complete peace of mind. Your new roof is protected by two separate warranties: one for the installation quality (our workmanship) and one for the materials themselves.

    1. Our 5-Year Workmanship Warranty: This is our direct promise to you. For a full five years after your installation, we cover any issues related to the quality of our work. If there’s a problem caused by our installation, we will fix it, no questions asked. This guarantees the quality and skill of our certified crews.
    2. The GAF Manufacturer’s Warranty: As GAF Certified roofers, we are able to offer robust warranties direclty from the manufacturer. This warranty protects you against any defects in the roofing materials themselves. Depending on the GAF System you choose, this can include long-term, non-prorated coverage that provides an exceptional level of protection for your investment.

    By combining our workmanship guarantee with a top-tier manufacturer’s warranty, we ensure that every aspect of your new roof is covered for years to come.

Stop Ponding Water Before It Compromises Your Roof Deck.