Alton, IL — 62002

Kosarek Construction Company - Alton, IL — 62002
Alton, IL

Roofing Contractor in Alton, IL — Residential & Commercial Roofing Services

Kosarek Construction Company is a fully licensed and insured roofing contractor proudly serving Alton, IL 62002 and the surrounding Madison County area. With 20+ years of combined industry experience rooted in the precision standards of the aerospace sector, our team delivers roofing installations, replacements, repairs, and commercial roofing systems that are engineered to perform. Whether you own a single-family home, a multi-unit property, or a commercial facility, Alton’s historic homes and downtown commercial buildings demands a roofing partner who meets every project with accountability and craftsmanship. Kosarek Construction is that partner.

From Illinois River Valley’s high humidity, ice dams, and hail season, Alton property owners face real roofing challenges year-round. Our crews specialize in slate, shingles, metal, and flat roof restoration systems — delivering solutions that are built to endure the local climate and protect your investment for decades. We offer free roof inspections, transparent written estimates, and a 100% Satisfaction Guarantee on every project we complete.

Residential Roofing Services in Alton, IL

Your home is your most significant asset, and the roof is its first line of defense. Kosarek Construction Company provides comprehensive residential roofing services to homeowners throughout Alton and Godfrey, Bethalto, and Wood River. Our residential division handles everything from routine inspections and targeted repairs to full roof replacements using premium manufacturer-certified materials. We are a certified GAF ShingleMaster contractor, which means our installations qualify for enhanced warranty coverage unavailable through non-certified roofers.

Residential Roofing Services Include:

  • New roof installation and complete roof replacement
  • Asphalt shingles — architectural, dimensional, and impact-resistant grades
  • Metal roofing — standing seam, exposed fastener, and steel panels
  • Tile roofing — slate, clay, and concrete tile systems
  • Spray-on silicone roof coatings
  • Roof repair — leaks, storm damage, flashing, gutters, and ventilation
  • Roof deck inspection and replacement
  • Free residential roof inspection and written estimate

Commercial Roofing Services in Alton, IL

Commercial property owners and building managers in Alton rely on Kosarek Construction Company for durable, code-compliant roofing systems that minimize disruption to business operations. We specialize in low-slope and flat roof applications used across office buildings, retail centers, warehouses, industrial facilities, and multi-family properties. Our commercial roofing team brings the same aerospace-grade attention to detail and project management discipline to every commercial engagement — on time and within budget.

Commercial Roofing Systems We Install:

  • TPO (Thermoplastic Polyolefin) single-ply membrane systems
  • PVC (Polyvinyl Chloride) roofing — chemical-resistant and heat-weldable
  • EPDM (Thermoset) rubber roofing — ideal for large flat roof applications
  • Built-Up Roofing (BUR) — multi-ply tar and gravel systems
  • Spray-on silicone coatings — cost-effective flat roof restoration
  • Commercial metal roofing and standing seam systems
  • Roof maintenance programs and commercial inspection services

90% of Projects

Come From Referrals or Repeat Clients

Roof Repair & Storm Damage Restoration — Alton, IL

Severe weather can cause sudden, significant damage to roofing systems across Alton and Madison County. Kosarek Construction provides rapid-response roof repair services for storm damage, wind uplift, hail impact, fallen debris, and active leaks. Our inspectors conduct a thorough assessment, document all damage, and provide a detailed repair scope — which also serves as the foundation for any insurance claim you may need to file. We respond promptly to protect your property from secondary water intrusion damage.

Insurance Claim Assistance in Alton, IL

Navigating a roofing insurance claim can be one of the most frustrating experiences a property owner faces. Kosarek Construction Company simplifies the process by working directly with your insurance adjuster from first contact through final settlement. Our licensed team documents all storm and weather damage thoroughly, prepares the claim package, and advocates for the full scope of covered repairs on your behalf. We have helped hundreds of IL homeowners and commercial property owners secure maximum claim coverage — and our process is designed to get your roof replaced with minimal out-of-pocket exposure.

Our Insurance Claim Process:

  • Free roof inspection and damage documentation
  • Free roof inspection and damage documentation
  • Detailed damage report and scope of work preparation
  • Direct coordination with your insurance adjuster
  • Roof replacement scheduled immediately upon claim approval

Why Alton Property Owners Choose Kosarek Construction

  • Licensed & Insured: Licensed in Illinois and Missouri — Iowa License #IA C141907, Illinois Residential & Commercial #104.019647
  • Certified ShingleMaster: GAF-certified contractor — enhanced warranty eligibility on qualifying systems
  • 20+ Years Experience: Leadership background in aerospace — unmatched precision and project accountability
  • 100% Satisfaction Guarantee: We stand behind every project we install and every repair we complete
  • Insurance Claim Experts: We handle the adjuster coordination so you can focus on your property
  • Free Estimates: No-cost roof inspection and written estimate for all residential and commercial projects
  • Serving Alton & Surrounding Areas: Godfrey, Bethalto, and Wood River and all of Madison County

Get a Free Roofing Estimate in Alton, IL

If you are a homeowner or commercial property owner in Alton, IL looking for a reliable, licensed roofing contractor — Kosarek Construction Company is ready to help. Contact us today to schedule your free roof inspection and receive a no-obligation written estimate. Our team serves Alton (62002), Godfrey, Bethalto, and Wood River, and all of Madison County.

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