Layers of protection, built to take a beating.
Modified bitumen is the proven, multi-ply asphalt system for flat and low-slope commercial roofs. Layered redundancy, a tough granular surface, and flexible SBS membranes that flex with Midwest freeze-thaw. Buckshot installs and services it across Wisconsin and Iowa with our own crews.
Why building owners spec mod-bit
Start with a free roof assessment.
New membrane, a reroof over an aging built-up roof, or a leak you need handled? Tell us about the building and we'll assess it, recommend the right system, and put it in a written proposal. We respond within 2 hours.
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A roof built in plies, not a single sheet.
Modified bitumen is the modern evolution of built-up roofing. Instead of one membrane, it stacks layers that back each other up, from the deck to the surface.
Base ply
Anchored over insulation to the deck, the first line of waterproofing the rest builds on.
Reinforcement
A fiberglass or polyester mat inside the membrane adds strength and dimensional stability.
Cap sheet
The polymer-modified asphalt membrane, the primary waterproofing layer that takes the weather.
Granular surface
Embedded mineral granules shield against UV and abrasion, and light colors add reflectivity.
Two modifiers. One is built for our winters.
Modified bitumen comes in two polymer types. The difference matters most in a climate that swings from humid summers to deep freezes.
SBS
SBS adds a rubber-like flexibility that lets the membrane move with temperature swings instead of cracking, ideal for Midwest freeze-thaw.
- Stays flexible in cold weather
- Handles expansion and contraction
- Hot-mopped, cold-applied, or self-adhered
APP
APP adds a plastic-like toughness with strong UV and heat tolerance. It's typically torch-applied and common in hotter regions.
- Excellent UV and heat resistance
- Durable, hard-wearing surface
- Usually torch-applied
Tough, proven, and easy to live with.
Mod-bit has held up commercial roofs for decades. Here's what keeps it on the spec sheet.
Multi-ply redundancy
If one layer is breached, others back it up. Built-in insurance against leaks.
Proven & long-lasting
Decades of real-world track record on commercial roofs, a known quantity, not a gamble.
Tough underfoot
Handles foot traffic and rooftop equipment better than thinner single-ply systems.
Easy to repair
Damage patches cleanly, so spot fixes keep the roof going for years.
Reroof & replacementThe right method, applied safely.
Mod-bit can go down several ways, and the best one depends on your building, deck, and what's occupied below. We pick the safest, longest-lasting method and run it with our own crews, never subcontracted.
- Torch-applied, hot-mopped, cold-adhesive, or self-adhering to fit the job
- Strict fire-watch and safe-torch practices on every torch-down install
- Tear-off, or a recover over a sound built-up roof where it makes sense
- Scheduled around your hours for minimal disruption
Made for buildings that take a beating.
Mod-bit is a strong call for flat and low-slope roofs that see foot traffic, rooftop equipment, or just demand a long, dependable life.
Long life and easy repair for tight maintenance budgets.
Dependable waterproofing where leaks aren't an option.
Tough, proven roofs over multiple tenant spaces.
Big flat roofs that need durability over square footage.
A spec-friendly, well-documented, long-life system.
Traffic-tough roofing over apartments and condos.
A torch-down roof is no place to cut corners.
Modified bitumen rewards an experienced crew and punishes a careless one, especially anything involving open flame. Buckshot has been family-owned since 1979, licensed across 24 states, with our own crews and the standards a job like this demands.
Rated 4.9 stars across 80 reviews.
A few words from Buckshot customers. Read the rest on our reviews page.
"Roof done less than a day, great work."
"Very good workmanship in my opinion."
"I paid my deductible and Buckshot worked with the insurance."
Q.01What is modified bitumen roofing?+
Q.02What's the difference between APP and SBS?+
Q.03How is it installed?+
Q.04Mod-bit or single-ply like PVC or TPO?+
Q.05Can you reroof over our existing roof?+
Q.06How long does modified bitumen last?+
Explore commercial roofing.
Put a tough, layered roof over your building.
Whether it's a new modified bitumen system, a recover over an aging roof, or a leak to chase down, start with a free assessment from a commercial crew licensed across 24 states. We respond within 2 hours.
Buckshot General Contracting, family-owned since 1979. Headquartered at 621 N Sherman Ave, Suite B5, Madison, WI 53704, with a field office in Centerville, IA. Licensed in 24 states. WI Lic. DC-080900045. GAF Master Elite and BBB A+ accredited. Membrane types, application methods, and lifespan ranges are general industry guidance; actual performance depends on the system, building, installation, and maintenance. System type and scope are confirmed on-site and in a written proposal. Credentials and licensing current as of publication.