Flat Roofing Services in St. Louis
CGR Legacy Construction provides flat roofing services for commercial properties in St. Louis. We handle repairs, replacements, and installations with a focus on performance, drainage, and durability.
When Repairs Aren’t Enough Anymore
Over time, commercial roofing systems wear down from exposure, weather, and use.
At a certain point, repairs become:
- Frequent
- Less effective
- More expensive over time
That’s when replacement becomes the better long-term solution.
Common Flat Roofing Issues
- Ponding water
- Leaks or moisture intrusion
- Membrane damage
- Drainage problems
- Storm-related damage
Flat roofs can fail quickly if small issues aren’t addressed early.
Flat Roof Replacement Done Right
Our replacement process focuses on performance and durability.
Remove existing roofing system
Inspect underlying structure
Ensure proper drainage and sealing
We tailor each project to your building and operational needs.
Why Businesses Choose CGR Legacy
Clear, honest recommendations
Focus on long-term performance
Clean, organized project execution
Experience with commercial systems
Local St. Louis service
Our Flat Roof Replacement Process
Schedule inspection
Evaluate roof condition
Develop replacement plan
Schedule project timeline
Complete installation
Final walkthrough
Plan Your Flat Roof Replacement
If your roof is nearing the end of its lifespan, the best next step is a professional inspection.
Common Flat Roofing Systems We Work With
Most low-slope roofs in the St. Louis area use one of a few membrane systems, and each ages differently. Knowing what you have is the first step in deciding whether to repair or replace it.
- TPO – A single-ply membrane valued for its reflectivity and seam strength. Failures typically show up at seams and flashing details.
- EPDM – A durable rubber membrane. Problems usually appear as shrinkage, punctures, or seam separation as it ages.
- Modified bitumen – A layered asphalt-based system. Age-related cracking and blistering are the common issues.
- Built-up roofing (BUR) – Traditional multi-layer systems still found on many older buildings.
Part of our inspection is simply identifying your system and giving you an honest read on how much service life is realistically left in it.
Preventive Maintenance Protects Your Investment
Flat roofs reward attention. A small amount of upkeep prevents the majority of expensive failures we get called out for:
- Keep drains, scuppers, and gutters clear so water can actually leave the roof.
- Inspect seams and flashing after major storms – these are the first places a roof gives way.
- Address punctures early, especially after HVAC or other rooftop service work.
- Watch for ponding that lingers more than 48 hours after rain.
- Schedule a professional inspection periodically rather than waiting for a leak.
Catching a small breach early is almost always the cheapest option available, and it protects the insulation and decking underneath from moisture damage that cannot be patched away later.
Related Services
Flat roofing often overlaps with our other commercial work: Commercial Roofing, Commercial Roof Repair, and Commercial Roof Replacement. If a storm may have caused the damage, start with a Storm Damage Inspection – we can also help with your insurance claim.
FAQ
How long does a commercial roof last?
Depends on the system, but many last 20–30 years.
How do I know if replacement is necessary?
Frequent repairs and aging materials are strong indicators.
Will replacement disrupt operations?
We work to minimize disruption during the project.
