MODIFIED BITUMEN ROOFING IN ST. LOUIS & ST. CHARLES COUNTY
Commercial Modified Bitumen Roof Repair • Replacement • Installation
Proven Commercial Flat Roofing Since 2001
Trusted Roofing Exteriors provides Modified Bitumen roofing services throughout St. Louis and St. Charles County, Missouri for commercial, industrial and multifamily properties.
Modified Bitumen is a proven asphalt-based commercial roofing system designed for flat and low-slope roofs. Its multi-layer construction provides excellent waterproofing, durability and resistance to rooftop traffic—making it a strong option for many commercial buildings throughout the St. Louis area.
With experience involving more than 2 million square feet of Modified Bitumen roofing, our commercial roofing team can inspect your existing roof and determine whether repair, restoration or replacement is the right approach.
FREE COMMERCIAL ROOF ASSESSMENT & DETAILED PHOTO REPORT
✓ Serving St. Louis
✓ St. Charles
✓ St. Peters
✓ O’Fallon
✓ Wentzville
✓ Lake St. Louis
WHAT IS MODIFIED BITUMEN ROOFING?
Modified Bitumen—often called Mod-Bit—is a commercial roofing membrane that combines asphalt with polymer modifiers and reinforcement materials.
Unlike a single-ply membrane, Modified Bitumen systems can incorporate multiple layers to create a durable waterproof roofing assembly.
Depending on the roofing specification and building, Modified Bitumen membranes may be installed using torch-applied, cold-applied or self-adhered methods.
The system is commonly found on:
Commercial Buildings • Industrial Facilities • Offices • Retail Properties • Apartments • Condominiums • Multifamily Properties • Institutional Buildings
If you already have a Modified Bitumen roof, you don’t necessarily need to know which type or installation method was originally used. Our commercial roofing team can evaluate the existing system and recommend the next appropriate step.
WHY MODIFIED BITUMEN WORKS FOR ST. LOUIS COMMERCIAL ROOFS
Commercial roofs throughout Missouri deal with major temperature swings during the year.
A St. Louis commercial roof can experience summer heat, UV exposure, severe thunderstorms, high winds, hail, freezing temperatures, snow and repeated freeze-thaw cycles.
Modified Bitumen is designed to remain durable through changing conditions while providing dependable waterproofing protection.
Multi-Layer Waterproofing
Modified Bitumen roofing can use multiple layers to provide redundant waterproofing protection for commercial flats and low-slope roofs.
Excellent Durability
Its reinforced construction makes Modified Bitumen particularly useful on commercial roofs that experience maintenance traffic around HVAC equipment and other rooftop systems.
Flexible Roofing Membrane
Polymer modification improves the membrane’s flexibility and ability to accommodate temperature changes.
Strong Puncture Resistance
Reinforced Modified Bitumen systems provide excellent resistance to punctures and physical damage when properly designed and installed.
Reflective Options
Certain Modified Bitumen systems are available with reflective surfaces that can help reduce rooftop heat absorption.
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Areas We Serve
- St. Charles
- St. Peters
- O'Fallon
- Lake St Louis
- St Louis
- Wentzville
- Chesterfield
- Ballwin
- Creve Coeu
MODIFIED BITUMEN ROOFING SYSTEMS
Torch-Applied Modified
Bitumen
Torch-applied Modified Bitumen uses controlled heat to bond specially manufactured membrane to the approved underlying surface.
This creates a strong, fully bonded roofing system and has been widely used on commercial flat roofs.
Because this installation involves an open flame, proper safety procedures and determining whether torch application is appropriate for the building are extremely important.
Cold-Applied Modified
Bitumen
Cold-applied systems use compatible roofing adhesives rather than a torch to adhere to the membrane.
This provides another installation option for buildings where a flame-free application is preferred or required.
Self-Adhered Modified
Bitumen
Self-adhered membranes incorporate a factory-applied adhesive backing.
These systems can provide dependable Modified Bitumen performance without requiring torch application and may be appropriate for certain commercial roofing projects.
MODIFIED BITUMEN ROOF REPAIR
Leaking Mod-Bit Roof Doesn't Always Need Replacement
If your Modified Bitumen roof is leaking, don’t assume you automatically need a completely new commercial roof.
Many leaks can originate from isolated areas that may be repairable when the overall roofing system remains in serviceable condition.
We inspect common problem areas including:
- Open seams and laps
- Cracks and membrane deterioration
- Blisters and raised areas
- Punctures and physical damage
- Roof-to-wall flashing
- HVAC curbs
- Pipe and vent penetrations
- Drains and scuppers
- Parapet walls and perimeter details
- Previous roof repairs
- Ponding-water areas
Finding the actual source of the water intrusion is the first step toward determining the appropriate repair.
HAVE A LEAKING COMMERCIAL FLAT ROOF?
Don’t wait until a small roof leak causes damage inside your building.
Trusted Roofing Exteriors can inspect the existing roofing system, identify problem areas and provide documentation of what we find.
FREE COMMERCIAL ROOF ASSESSMENT & DETAILED PHOTO REPORT
Commercial Roofing Since 2001 • BBB A+ Rated • Fully Insured
MODIFIED BITUMEN ROOF REPLACEMENT
There comes a point when repeatedly repairing an aging commercial roof no longer provides good value.
If the existing Modified Bitumen roofing system has widespread deterioration, recurring leaks, saturated insulation, extensive previous repairs or significant membrane failure, replacement may provide a better long-term solution.
Our commercial roofing team evaluates more than what can be seen from the surface.
We consider the condition of the:
✓ Existing Membrane
✓ Insulation
✓ Roof Deck
✓ Drainage
✓ Flashing
✓ Penetrations
✓ Perimeter Details
✓ Previous Repairs
REPAIR, RESTORE OR REPLACE?
We Don't Automatically Recommend a New Roof
One of the biggest mistakes a commercial property owner can make is assuming every leak means the entire roof needs replacement.
At Trusted Roofing Exteriors, we evaluate the existing roof first.
REPAIR
Repair may make sense when the overall roofing system remains serviceable and the problem is isolated to a particular seam, penetration, flashing detail or damaged area.
RESTORE
Some aging commercial roofs may qualify for a compatible restoration system when the existing roofing assembly remains in suitable condition.
REPLACE
Replacement may make more sense when there is widespread deterioration, recurring leakage, saturated insulation or extensive failure throughout the roofing system.
MODIFIED BITUMEN ROOFING FOR COMMERCIAL MULTIFAMILY PROPERTIES
Trusted Roofing Exteriors works with commercial building owners, property managers and multifamily communities throughout the Greater St. Louis area.
Our Modified Bitumen roofing services are available for:
- Warehouses & Industrial Buildings
- Office & Professional Buildings
- Retail & Shopping Centers
- Apartment Communities
- Condominiums & Townhomes
- Multifamily Properties
- HOAs
- Property Management Companies
- Medical & Institutional Properties
- Restaurants & Hospitality Properties
- Mixed-Use Buildings
2+ MILLION SQUARE FEET MODIFIED BITUMEN EXPERIENCE
Commercial roofing experience matters.
Trusted Roofing Exteriors has experience involving more than 2 million square feet of Modified Bitumen roofing, along with millions of additional square feet involving TPO, EPDM and Built-Up Roofing systems.
That broader flat-roof experience is important because we aren’t limited to recommending one type of roofing material.
We can evaluate your building and help determine which commercial roofing system is appropriate for the property.
MODIFIED BITUMEN ROOFING THROUGHOUT ST. LOUIS ST. CHARLES COUNTY
St. Charles County
✓ St. Charles
✓ St. Peters
✓ O’Fallon
✓ Wentzville
✓ Lake St. Louis
✓ Cottleville
✓ Dardenne Prairie
St. Louis County & Metro Area
✓ St. Louis
✓ Chesterfield
✓ Ballwin
✓ Creve Coeur
✓ Maryland Heights
✓ Town and Country
✓ Wildwood
✓ Kirkwood
✓ Clayton and surrounding communities
WHY TRUSTED ROOFING EXTERIORS?
- Serving Property Owners Since 2001
- BBB A+ Rated
- Fully Insured
- 2+ Million Square Feet of EPDM Roofing Experience
- Commercial Flat Roofing Specialists
- Commercial Roof Repair & Replacement
- Multifamily & Property Management Experience
- Detailed Commercial Roof Assessments
- Photo Documentation
Your commercial roof protects far more than the building itself. It protects your operations, tenants, employees, inventory, equipment and property investment.
We focus on finding the problem, documenting what we see and explaining your options clearly.
MODIFIED BITUMEN ROOFING FAQ
Service life varies based on the roofing system, number of plies, installation quality, building conditions, drainage, maintenance and exposure. An inspection can help determine the current condition and remaining serviceability of an existing roof.
Yes. Open seams, flashing problems, punctures and other localized damage can often be repaired when the overall roofing system remains in serviceable condition.
Common problems can include deteriorated seams, flashing failures, punctures, roof penetrations, drainage problems, membrane deterioration and aging previous repairs.
Yes. Modified Bitumen has a long history of use on commercial flat and low-slope roofing applications and can provide excellent waterproofing and durability when properly designed and installed.
Modified Bitumen is an asphalt-based reinforced roofing system, while TPO is a thermoplastic single-ply membrane with heat-welded seams. Both can be excellent commercial roofing systems, but the appropriate choice depends on the building and project requirements.
We work with Modified Bitumen systems, including appropriate torch-applied applications. Whether torch application should be used depends on the building, roof assembly, project conditions and system specifications.
Yes. We provide commercial roof repair and replacement throughout St. Charles County, including St. Charles, St. Peters, O’Fallon, Wentzville, Lake St. Louis, Cottleville and surrounding areas.
GET A COMMERCIAL ROOF ASSESSMENT
Not Sure What Your Modified Bitumen Roof Needs?
You don’t have to decide whether your roof needs repair, restoration or replacement before calling us.
Let our commercial roofing team evaluate the existing system first.
FREE COMMERCIAL ROOF ASSESSMENT & DETAILED PHOTO REPORT
Trusted Roofing Exteriors
Your Roof, Our Reputation
Commercial Roofing Since 2001
Serving St. Louis & St. Charles County, Missouri