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Flat Roof Replacement in Evanston, IL: Tearing Off Modified Bitumen and Installing a TPO Membrane with Polyiso Insulation
The Importance of Roof Replacement in Chicago, IL
In Chicago’s fluctuating climate, it’s essential to have a roof that can withstand harsh winters and hot summers. Modified bitumen roofing, once a popular choice, can become worn down over time, leading to leaks, poor insulation, and higher energy bills. As roofs age, they may develop cracks, punctures, or seams that fail, compromising the integrity of the entire structure. Replacing an old modified bitumen roof with a modern TPO roofing system is a wise investment that enhances the energy efficiency of your building with low maintenance.
Step 1: Tearing Off the Modified Bitumen Roof
The first step in any roof replacement project is carefully removing the existing roofing material. For properties in Chicago and the surrounding areas of Illinois, we have the experience and tools necessary to efficiently tear off modified bitumen without causing damage to the underlying structure. Our team conducts a thorough inspection of the roof called a core sample, identifying the sublayers of the current roofing system is installed.
We inspect what is beneath the current layer on get down to the base of the roof to identify any potential issues or hazards when removing the flat roof. We work quickly to minimize disruption to your daily operations.

Step 2: Installing TPO Roofing Membrane
Once the flat roof, which commonly is a modified bitumen membrane, has been removed, we proceed with installing the new TPO (Thermoplastic Olefin) roofing membrane. TPO has become a popular choice for commercial and residential properties in the Midwest due to its exceptional durability, energy efficiency, and low maintenance. Some of the key benefits of TPO roofing include:
- Durability: TPO membranes are resistant to UV rays, chemical exposure, and punctures, making them ideal for withstanding Evanston’s diverse weather conditions.
- Energy Efficiency: TPO membranes are reflective, helping to reduce heat absorption and lower cooling costs in the warmer months.
- Low Maintenance: With proper installation and care, TPO roofing systems require minimal maintenance and last for many years.

Step 3: Adding Polyiso Insulation for Enhanced Energy Efficiency
After installing the TPO membrane, we add polyiso insulation to further improve your building’s energy performance. Polyiso (polyisocyanurate) is one of the most efficient insulation materials available today, providing excellent thermal resistance and helping to regulate the temperature inside your building.
By combining TPO with polyiso insulation, you create a roofing system that not only protects your building from the elements but also helps you save money on energy bills year-round. Polyiso insulation reduces the need for excessive heating and cooling, making your building more comfortable and environmentally friendly.
Why Choose GSKI Construction Group for Your Roof Replacement?
At GSKI Construction Group we understand that a roof replacement is a significant investment, and we strive to make the process as smooth and stress-free as possible. Here’s why Chicago property owners trust us with their roofing needs:
- Expertise: With years of experience in the roofing industry, our team has the knowledge and skills to handle complex roof replacements, including modified bitumen tear-offs and TPO installations.
- Quality Materials: We use only high-quality roofing materials, including TPO membranes and polyiso insulation, to ensure long-lasting results.
- Customer Satisfaction: We are committed to delivering exceptional service and ensuring our clients are fully satisfied with the completed project. We service the roof for its entire lifetime so if you ever have a leak, we’ll be there to solve the issue.
- Competitive Pricing: We offer fair and transparent pricing without compromising on the quality of our work.
Upgrading your roof from a modified bitumen system to a TPO membrane is a smart choice for property owners in Chicago and Chicagoland throughout Illinois. At GSKI Construction Group we specialize in providing high-quality roof replacements that improve energy efficiency, durability, and overall performance. Don’t wait for leaks or costly repairs—reach out to us today to transform your roof with our expert roofing solutions.
Ready to replace your modified bitumen roof with a durable, energy-efficient TPO roofing system? Contact GSKI Construction Group today for a free consultation and estimate. Our team is here to guide you through every step of the process, from the initial tear-off to the final installation. We proudly serve Evanston, Wilmette, Glencoe, Glenview, Winnetka, Northfield, Northbrook, Highland Park, Deerfield, Lake Forest, Vernon Hills, Libertyville, Skokie, Morton Grove, Park Ridge, Des Plaines, Niles, Mt. Prospect, Arlington Heights, Wheeling, Buffalo Grove, Palatine, Elgin, Barrington, West Dundee, St. Charles, Schaumburg Glen Ellyn, Addison, Elmhurst, Oakbrook, Franklin Park, Oak Park, La Grange, Hinsdale, Westmont, Downers Grove, Lisle, Wheaton, Naperville, Aurora, River Forest, Bolingbrook, Darien, Palos Heights, Orland Park and surrounding areas. We even can service areas as far as Peoria, Bloomington, Springfield, Champaign and Rockford. We focus on delivering top-tier roofing solutions that protect your property and save you money in the long run.
Call us at 312-444-0240 or fill out our online form to schedule your roof replacement today!