Custom Curb Adapters Built Right
Let’s Build What You Need
Our curb adapters are engineered for seamless RTU changeouts, no field fabrication, no wasted time. Whether you’re upgrading HVAC systems or replacing outdated units, Madon Sheet Metal delivers precision-built curb adapters that align with your specs and your install schedule.
Curb Adapters That Fit First Time
A Family Tradition of Trust and
Hard Work
Our curb adapters are custom-built to match your rooftop unit replacement exactly, no guesswork, no field modifications. Whether you’re dealing with tight timelines or complex specs, we fabricate each unit to your measurements for a clean install and dependable fit. With fast turnaround, expert craftsmanship, and union-certified welds, Madon curb adapters help you finish strong and on schedule.
Why Contractors Choose Our Adapters
Custom-Built for Exact Fit
Fast Turnaround You Can Count On
Built Strong, Union Sealed
Our Values are welded into everything we do
Our Work Reflects What We Believe
YOU WANT OUR WELDING.
Skilled Union Labor
We’re proud to be a union shop staffed by certified professionals who take pride in every weld, cut, and corner. Experience, safety, and integrity aren’t extras; they’re the standard.
Fabricated with Purpose
Every piece we produce is made with intent designed to solve real-world jobsite challenges, fabricated to exact specs, and built to last long after installation.
Partners in Your Deadline
We understand that time is money. That’s why we communicate clearly, move quickly, and treat your timeline like our own, no excuses, just results.
Let’s Get Your Adapter Built
Why Builders Trust Madon
Ready to place an order or need a quote? Send us your specs and let’s get to work. Whether it’s a one-off replacement or a full batch of rooftop units, our team is here to make the process smooth, fast, and accurate. No surprises. No delays. Just curb adapters that fit the first time.
Precision-Fit Every Time:No cutting, no patching, just accurate adapters made to match your existing curb and new unit perfectly.
Built for Harsh Conditions: Fabricated with durable materials and expert welds to stand up to real jobsite demands.
Easy to Order, Fast to Install: Streamlined request process and quick turnaround so you can keep your project on track.
Trusted by Industry Leaders Who Demand the Best
Trusted by Industry Leaders
Who Demand the Best
““The best quality in customer service and extremely quick turnaround. During an emergency, John quickly fabricated and delivered directly to our job site within hours.””
Got Questions? We’ve Got Answers
Frequently Asked Questions
To get started, we need your existing curb dimensions, the new RTU model info, and any special site conditions. CAD files or sketches are helpful, but not required.
Yes. We regularly fabricate adapters for major brands like Trane, Carrier, Lennox, and York. Just let us know the old and new model numbers, and we’ll handle the rest.
Most standard curb adapter orders ship within 3-5 business days. Larger or more complex custom builds may take slightly longer, but we’ll confirm timelines upfront.
Absolutely. We can fabricate for flat or pitched roof configurations, with pitch correction built in if needed. Just let us know the specs during your request.
We use durable galvanized steel as standard, but stainless steel and aluminum options are also available upon request depending on project needs or specs.
Yes, we provide 3D CAD models or approval drawings when needed to ensure fit before we start cutting metal.
Yes, we ship curb adapters nationwide and can coordinate delivery with your jobsite schedule.
Precision Metal Work Built to Last
Chicago’s Leading Provider of Custom Curb Adapters and Welded HVAC Fabrication Solutions. Proudly serving contractors, engineers, and builders across the region with precision-built components, certified welds, and fast turnaround you can
count on.
Chicago’s Leading Provider of Custom Curb Adapters and Welded HVAC Fabrication Solutions. Proudly serving contractors, engineers, and builders across the region with precision-built components, certified welds, and fast turnaround you can count on.
