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⭐⭐⭐⭐⭐ 4.8 | 400+ reviews | BBB A+ rating

St. Louis's Most Trusted Flat Roofing Contractors

Flat Roofing in St. Louis, MO

Free inspections within 24 hours. Transparent pricing with no surprises. Zero payment until your new flat roof is complete and you're 100% satisfied. Over 25 years protecting St. Louis properties from weather, wear, and worry.
Locally Owned & Operated BBB A+ AccreditedFully Insured

Proven. Trusted. Backed by Your Neighbors

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Professional Flat Roofing Services in St. Louis, Missouri

Your property deserves more than just any flat roof overhead. Whether you’re protecting a commercial building, finishing a residential addition, or replacing an aging system, the quality of that installation determines everything. How long your flat roof lasts. How well it protects your belongings. How much you spend on energy bills. How your building performs through every season. One professional flat roofing installation done right protects your investment for decades. One careless installation creates problems you’ll fight for years.

When you’re ready to install a new flat roof, you face dozens of decisions that seem overwhelming. Which membrane system actually performs well in St. Louis’s climate? How much drainage does your roof really need? What insulation provides real energy savings? Should you upgrade your substrate? Do you need additional reinforcement around penetrations? These aren’t just technical details. They’re the difference between a flat roof that performs beautifully for 25 years and one that fails in year seven.

Schedule Your Services Now!

Why St. Louis Property Owners Need Reliable Flat Roofing

Here’s what separates professional flat roofing from amateur work. The materials themselves are only half the equation. How those materials get installed matters just as much as which system you choose. We’ve torn off countless flat roofs that used premium membranes but failed early because someone rushed the installation, skipped critical steps, or didn’t understand proper sealing techniques.

St. Louis’s weather demands more from your flat roof than most people realize. Spring thunderstorms and hail test every membrane’s impact resistance. Summer heat cycles expand and contract materials thousands of times. Fall windstorms challenge every seam’s integrity. Winter ice and snow push drainage systems to their limits. Your flat roofing installation needs to handle all of this, year after year, without compromise.

The Hidden Cost of Poor Flat Roof Installation

Picture this common scenario. You hired the lowest bidder to install your new flat roof last year. Everything looked fine when they finished. But now you’re noticing problems. Small leaks around HVAC units during heavy rain. Membrane seams separating on hot days. Ponding water that never drains where improper slope creates standing pools. Your beautiful new flat roof is failing, and the company that installed it stopped returning your calls months ago.

Poor installation doesn’t announce itself with obvious signs on day one. It reveals itself slowly through premature failure, costly repairs, and endless frustration. By the time you realize something’s wrong, your warranty claims get denied because “improper installation voids coverage.” You’re stuck paying twice for the same roof.

This happens across St. Louis, Clayton, Chesterfield, and Kirkwood every single month. But it doesn’t have to happen to you.

St. Louis's Most Trusted Flat Roofing Services

Coldstream Exteriors has spent over 25 years installing flat roofs that perform exactly as they should. We specialize in professional flat roofing services that solve problems before they start instead of creating issues you’ll fight later. We’re not here to rush through your project. We’re here to give you a properly installed flat roof with quality materials, experienced crews, and guarantees that actually mean something.

Expert Flat Roofing for Every Situation

Many St. Louis property owners come to us with different flat roofing needs. Maybe you’re adding a commercial space and need reliable protection from day one. Maybe you’re building new and want the flat roof done right before anything else proceeds. Maybe you’re expanding and need seamless integration with your existing roof. Maybe your current flat roof is beyond repair and needs complete tear-off and reinstallation.

Whatever brings you here, you probably have questions. What’s the best flat roofing approach for your specific situation? How long will installation take? What can you expect during the process? Will your operations be protected during construction?

Here’s exactly what happens. Call us for a free consultation and we’ll come to your property within 24 hours to assess your project properly. We’ll discuss your goals, explain your membrane options, answer every question thoroughly, and provide a detailed written estimate that covers everything. We’ve installed hundreds of flat roofs across St. Louis, and we know exactly what it takes to deliver results you can count on for decades.

Need more than just expert flat roofing? Protect your entire building with professional commercial roofing services that complement your new flat roof!

Our Proven St. Louis Flat Roofing Process

A Flat Roofing Process That Works

Step 1Contact Us for Your Free Project Consultation
Step 2Detailed Site Assessment and Material Review
Step 3Transparent Written Estimate You Can Understand
Step 4Expert Installation by Experienced Crews
Step 5Final Inspection and Thorough Property Cleanup

Frequently Asked Questions About Flat Roofing in St. Louis

How much does flat roofing cost in St. Louis?

Most St. Louis flat roofing installations range from $6,500 to $22,000, depending on your building’s size, accessibility, and membrane choice. A typical 2,000 square foot flat roof averages $12,000-$16,000. Smaller structures typically cost $4,500-$9,000. We provide detailed written estimates after your free consultation, and you pay nothing until installation is 100% complete.

How long does flat roof installation take in St. Louis?

Most flat roofing installations take 2-4 days with our experienced crews. Simple residential flat roofs can be completed in one to two days, while larger commercial buildings typically take 3-4 days. New construction timelines coordinate with your builder’s schedule.

What flat roofing materials do you recommend for St. Louis properties?

TPO membrane is most popular for St. Louis buildings, lasting 20-30 years with excellent weather resistance. EPDM rubber roofing offers proven durability at lower cost. Modified bitumen provides exceptional multi-layer protection. During your consultation, we show you samples and explain which systems work best for your building.

Do you handle flat roofing for new construction projects?

Yes, we work with property owners, builders, and contractors on new construction flat roofing throughout St. Louis. We coordinate with your construction timeline, deliver materials on schedule, and install your flat roof system according to code requirements and manufacturer specifications.

Can you install a new flat roof over my existing membrane?

Building code allows overlay in some situations, but we rarely recommend it. Complete tear-off lets us inspect your substrate, replace damaged decking, ensure proper drainage, and install new insulation. This approach delivers better long-term performance and full manufacturer warranties.

What makes Coldstream Exteriors different from other St. Louis flat roofing companies?

You pay nothing until your flat roof installation is 100% complete and you’re satisfied. No deposit, no progress payments, no financial risk. We’ve earned our BBB A+ rating and 4.9 stars from 400+ customers by treating St. Louis property owners right for over 25 years.

How do I prepare my building for flat roof installation?

We handle most preparation, but property owners should ensure rooftop equipment is accessible, remove relocatable items, and maintain clear access around the building. We’ll provide a complete preparation checklist before we start.

Coldstream Exteriors Is Here For All Your St. Louis Flat Roofing Needs!

Experienced & Certified Flat Roofing ProfessionalsFree Consultations & Transparent EstimatesServing St. Louis, Clayton, Chesterfield & Surrounding Areas For Over 25 YearsManufacturer-Certified InstallationComplete Property Protection During Construction

Complete Exterior Services In St. Louis & Surrounding Areas

No matter what exterior project you're planning, our St. Louis team offers a full range of building exterior services, including:

Protecting St. Louis homes for over 25 years

OUR SERVICE AREA

Coldstream Exteriors proudly serves St. Louis and surrounding communities with quality flat roofing services. If you are in the following cities, you can count on us for reliable flat roof installation:

AND MANY MORE!

Don’t see your location? Call us at (314) 380-8111.

Get Your Free St. Louis Flat Roofing Consultation Today

Ready to protect your property with a professionally installed flat roof that lasts? Contact Coldstream Exteriors for a free consultation and honest assessment. Our St. Louis team will show you exactly what your project needs, explain your options, and provide a transparent estimate. No deposit required, no payment until completion, no pressure. Just trusted service from local contractors earning five-star reviews for over 25 years.