- Orland Park, IL
- Monday - Friday | 9:30 AM to 5 PM
- 708-334-1948
- mikemoussa@americanshieldexteriors.com
Welcome to the Modified Roofing service page from American Shield Exteriors. If you have a low-slope or nearly flat roof, in need of robust protection against harsh Midwestern weather—wind, heavy rain, snow, or thermal cycling—you’ve come to the right place. Our team in Orland Park specializes in high-performance Modified Roofing systems that merge durability, flexibility, and long-term value.
Modified Roofing (often called “modified bitumen roofing”) is a specialized roofing solution designed for low-slope and flat roof applications. At its core, it uses asphalt membranes that have been enhanced with polymer additives—either rubber or plastic—to improve performance.
In short: When you hire American Shield Exteriors for Modified Roofing, you’re getting a roofing system that is far more advanced than simple roll-roofing or standard asphalt shingle systems. We tailor the system to handle the unique demands of flat or nearly flat roofs—especially important in our Illinois climate where winters are harsh and the freeze/thaw cycle can be punishing.
Modified Roofing stands out in several specific scenarios. Here are when it makes sense (and when you should speak with us to evaluate if it’s right for you):
Steep-pitch roofs: Traditional shingles or metal roofing might make more sense.
Very small repair jobs: If the roof is in good shape and only minor repairs are needed, full replacement with a mod-bit system might be overkill.
Budget constraints: While the cost is competitive for the value offered, mod-bit systems can cost more than basic roll roofing.
When aesthetics dominate: If you have a pitched decorative roof where shingles or tiles are needed, mod-bit is for low slopes rather than high-visibility pitched surfaces.
At American Shield Exteriors, we’ll walk you through whether your roof is a candidate for Modified Roofing—and if it is, why it’s likely the smart choice.
We take pride in a streamlined, transparent process that ensures you know what’s happening at each step. Here’s how we execute a modified roofing project:
One of our experienced project managers will visit your property in Orland Park and assess your current roof structure: its slope, condition of existing membrane, drainage, insulation, penetration details (vents, skylights, HVAC curbs).
We’ll identify any problem areas: ponding water, existing leaks, flashings, edge details, etc.
Then we’ll explain whether a Modified Roofing system is suitable, and compare it with alternatives (shingles, single-ply membranes, etc.).
We provide a clear written estimate, timeline, and material specification so you can make an informed decision.
If removal of the old roofing membrane is needed, our team will safely tear off the existing layers, dispose of debris, and inspect the deck/substrate for damage, rot, or structural issues.
In some cases (depending on condition and building code), we may perform an overlay option—but only if safe and practical.
We ensure the roof deck is clean, dry, and ready for the new installation, repairing any substrate deficiencies along the way.
A quality mod-bit system often includes insulation boards or cover boards to improve thermal resistance and support the membrane.
Next we install the base sheet: the first layer of modified bitumen, adhered (via torch, cold adhesive, or self-adhered method) to the substrate.
At American Shield Exteriors, we ensure all seams, penetrations (vents, pipes, skylights) and flashings are properly detailed and prepped.
Following the base layer, we apply the cap (top) sheet of modified bitumen membrane. This layer carries the granule or reflective surface, and is designed to bear exposure to the elements.
Depending on your specification, this top sheet may be torch-down, self-adhered, or cold-applied. (Self-adhered systems reduce fumes and install time.)
Flashings, edge metal, gutters, parapets, and other critical details are sealed and finished to ensure a watertight system.
We ensure all terminations, transitions, and penetrations are sealed and reinforced.
After installation, our crew will perform a full inspection of the new roof: checking for proper adhesion, proper lap covers, flashing integrity, clean site.
We’ll walk you through the finished product, explain any maintenance recommendations, and answer questions.
You receive documentation (photos, material specs, warranty information).
We recommend periodic inspections (twice per year is typical) to ensure the system remains in top form—and especially after major storms.
At American Shield Exteriors, we provide or coordinate warranty coverage with the manufacturer, and we stand behind our workmanship.
We also offer maintenance packages to extend the life of the system, including debris removal, inspection of seals and flashings, minor repairs.
Depending on the materials, installation quality and maintenance, a properly installed mod-bit roofing system can last about 20 to 30 years. Some premium systems may claim longer.
We aim for minimal disruption. Some installation methods (torch-down) can produce fumes and require safety precautions. We’ll explain the best method for your building and strive to keep things safe and clean.
Generally yes, for residential projects. For larger commercial jobs, or when a torch-down method is used, it may be safer to relocate occupants temporarily. We’ll discuss this ahead of time.
Yes — modified bitumen is designed for low-slope and flat roofs where water may collect. That said, proper drainage remains crucial. We’ll assess and improve drainage as part of our service.
Maintenance is straightforward: regular inspections, clearing debris, checking flashings and seals. If damage occurs, patching is simpler than many other systems.
The cost depends on size, insulation, substrate condition, penetrations, and number of plies. While mod-bit may cost more than basic roll roofing, the improved performance and lifespan often deliver better value long-term. We’ll provide a detailed estimate for your building.
Ready to explore a reliable Modified Roofing solution for your home or business? Contact American Shield Exteriors in Orland Park, IL, and let our experienced team assess your roof, explain your options, and deliver a top-tier installation that stands up to our Illinois climate.
From start to finish, we handle your property with care, respect, and attention to detail.
We install only top-grade materials to ensure long-lasting performance and durability.
Your satisfaction is our priority — we stand behind every project we complete.
