North Star

Roofers

Modified Bitumen Roof in Denver, Colorado

We install modified bitumen roofing for flat commercial buildings using layered asphalt rolls, durable base sheets, and torch-down membranes.

roofing specialists

Why Bitumen Roofing Stays Reliable

Bitumen roofs resist water, UV, and foot traffic. They’re tough, weather-safe systems ideal for flat commercial buildings.

Licensed & Fully Insured

All installs follow bitumen-specific safety codes

10+ Years of Experience

Asphalt roof layering done with exact process control

Free Estimates

Clear scope, pricing, and material guidance upfront

Fast & Timely Service

Seamless install schedules to avoid business delays

Storm Damage Experts

Resurface and seal compromised bitumen layers fast

Warranty-Backed Work

All installations come with full system warranty

What Is a Modified Bitumen Roofing System?

Modified bitumen roofing is a layered asphalt system designed for flat roofs needing flexibility, toughness, and waterproofing. It’s reinforced with polymers to handle Denver’s temperature shifts.

We install both APP and SBS systems, depending on your needs. APP bitumen adds UV protection, while SBS adds cold-weather flexibility. Our commercial roofing team builds and repairs multi-layer systems using industry-best materials.

You can also explore PVC and TPO alternatives. But if you want something long-lasting and traditional, modified bitumen is a proven choice.

Our Process

We know your time is valuable

1. Initial Consultation

2. Estimate & Recommendations

3. Project Scheduling

4. Professional Execution

5. Final Inspection

How We Upgrade Bitumen Roofing Systems

Our process includes laying base sheets, bonding membranes, and sealing edges to prevent water penetration. We apply torch-down or cold adhesive based on safety and building design.

We handle full bitumen roof replacements or patch repairs where heat cracking or blistering has appeared. Gutter connections and drainage upgrades are checked to avoid ponding.

Each install meets Denver’s commercial flat roof codes and includes slope checks, flashings, and vent detailing. Contact North Star Roofers for a licensed install.

Our Roofing Services

Roof Installations

Complete installation for homes and commercial buildings using modern methods, safe materials, and proven structural techniques.

Roof Repairs

Reliable repair services that handle leaks, surface wear, missing shingles, flashing issues, and storm-related damage with quick response.

Roof Replacements

Tear-off and full replacement of old or failing roofs using lasting materials like shingles, metal, and synthetic surfaces.

Asphalt Shingle Roofing

High-quality asphalt shingles installed with our dedicated expert care for lasting durability, storm resistance, and visual appeal

Metal Roofing

Steel or aluminum roofing systems designed for energy savings, weather protection, and decades of low-maintenance performance.

Gutter Installation

Seamless gutter systems built to manage heavy rainfall and protect foundations from pooling, erosion, and runoff damage.

Built Right Every Time

Real Client Feedback

We’ve delivered strong, weather-ready roofs across Denver, Colorado and nearby towns — protecting properties with quality and skill.

🧍‍♀️4. EPDM Roofing for Commercial Units

“We own multiple retail centers and trusted North Star with EPDM installation. The membrane was secured perfectly, flashing was neat, and they documented progress at every stage. Zero rework, zero mess. Highly reliable.”

— Sarah Webb, Business Owner

🧍‍♀️ 1. Modern Slate Roof and Gutter Fix

“North Star Roofers replaced our aging slate roof and upgraded our gutters. The result was flawless, with sharp lines and water flow tested before completion. The crew was polite, focused, and extremely clean throughout the job.”

— Jessica Morgan, Architect

🧍‍♂️ 2. New Asphalt Roof for Rental Homes

“We had several rental properties needing fast upgrades. The team handled scheduling, sourcing, and install like clockwork. Every shingle was aligned, cleanup was spotless, and the final walkthrough was clear and thorough.”

— David Torres, Property Manager