Business Details
43 Years
experience
Commercial Roofing Solutions in Wisconsin & Michigan
Since 1983, Nasi Roofing has been a trusted leader in commercial roofing solutions across Wisconsin and Michigan. Our team has installed and warranted over 20 million square feet of membrane roofing, consistently ranking among the nation's top contractors. As an authorized Duro-Last contractor, we specialize in durable, energy-efficient systems that withstand extreme weather conditions. Our expertise spans new installations, repairs, retrofitting, and maintenance for industrial, educational, healthcare, and multi-family properties. We prioritize long-term value through factory-controlled seam fabrication, reducing leaks and maintenance needs. Our commitment to quality is backed by industry-leading warranties and a proven track record of on-time, on-budget project completion. With offices in Appleton, Minocqua, and Hurley, we provide personalized service tailored to each client's unique needs. Our energy-efficient solutions help businesses reduce operational costs while ensuring structural integrity. The combination of advanced materials, skilled craftsmanship, and customer-focused service defines our approach to every project. For nearly four decades, we've built relationships based on reliability, transparency, and exceptional results in commercial roofing.
Services
New Roof Installation
Roof Repair + Replacement
Commercial Roof Inspection
Metal Retrofit Roofs
Duro-Last Systems
Details
- Year established: 1983
Highlights and features
- Authorized Duro-Last contractor since 1983
- Installed 20+ million square feet of membrane roofing
- Factory-controlled seam fabrication reduces leak risks
- Energy-efficient systems lower heating/cooling costs
- Top-ranked national commercial roofing contractor
Associations and certifications
- Duro-Last
Services
New Roof Installation
We specialize in complete commercial roof installations using Duro-Last membranes. Our factory-prefabricated systems feature up to 85% pre-seamed construction for superior leak protection. Energy-efficient materials reduce heating and cooling costs while withstanding Midwestern weather extremes. Projects include industrial facilities, schools, healthcare centers, and apartment complexes across Wisconsin and Michigan.
Roof Repair + Replacement
Our repair services address leaks, energy inefficiency, and weather damage in commercial properties. We assess existing roofs for repair viability or recommend full replacements when needed. The Duro-Last system installation over aging metal roofs eliminates costly tear-offs while improving thermal performance. Emergency services handle urgent roof failures in critical facilities.
Metal Retrofit Roofs
We install Duro-Last membranes over existing metal roofs without removal. This retrofit solution prevents corrosion, reduces maintenance needs, and improves energy efficiency. The system eliminates creaking from temperature changes and provides a permanent watertight barrier. Ideal for upgrading aging metal structures in industrial and commercial settings across our service area.
Commercial Roof Inspection
Our inspection service evaluates roof condition, identifying potential issues before failures occur. We provide detailed reports with repair recommendations or replacement timelines. Inspections cover membrane integrity, seam durability, and energy efficiency metrics. Clients receive maintenance plans to extend roof lifespan and prevent costly emergencies.
Duro-Last Systems
As Wisconsin's #1 Duro-Last contractor, we install custom-fabricated PVC roofing systems. Factory-controlled seams ensure 85% fewer field joints, minimizing leak risks. The reflective membranes reduce energy consumption while withstanding extreme weather. Systems include warranties backed by Duro-Last's 30+ years of industry leadership in single-ply membrane technology.
Questions
What commercial roofing services do you offer?
We provide new roof installations, repairs, replacements, inspections, and metal retrofit solutions using Duro-Last systems for industrial, educational, healthcare, and multi-family properties.
How long have you been in business?
Nasi Roofing Company has specialized in commercial roofing since 1983, with over 20 million square feet of membrane installations across Wisconsin and Michigan.
What makes Duro-Last roofs energy efficient?
Duro-Last's reflective PVC membranes reduce heat absorption, lowering cooling costs in summer and improving thermal retention during winter months.
Do you serve locations outside Wisconsin?
Yes, we serve commercial clients throughout Michigan in addition to Wisconsin, with offices in Appleton, Minocqua, and Hurley.
How do you handle emergency roof repairs?
While we don't offer 24/7 emergency services, we prioritize urgent roof issues for critical facilities and provide prompt assessment and repair scheduling.
What warranties are available?
Our Duro-Last systems come with industry-leading warranties covering both materials and workmanship, with terms varying based on system selection.
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Reviews (2)
G. Capps
Nov 16, 2020
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The best roofers around. Fast and professional with a great price and an excellent crew. I couldn't ask for better. I recommend N.A.S.I. Construction and will use them again for future projects. Service: Roof installation
Matthew Moeller
Oct 11, 2018
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Our family has worked with this company over the past 30+ years! They are a top notch outfit that you can count on no matter the issue.