Precision-Engineered
Rooftop Solutions
From curb adapters to full package curbs, every product is custom-fabricated to your exact project specifications.
Roof Curb Systems
Complete line of roof curb products for commercial HVAC applications.
Universal Curb Adapter
Custom-fabricated transition adapter engineered to bridge an existing roof curb to any new rooftop unit — eliminating the need for costly curb tear-outs, roof penetrations, or structural modifications.
Fan Curb Adapter
Engineered transition platform for rooftop exhaust fans, upblast units, and centrifugal exhausters — supporting round-to-square conversions, hinge kits, and acoustic treatments.
Build Professional Submittals
In Seconds, Not Hours
Stop manually copying and pasting specs into Word documents. Our Submittal Builder compiles technical data, drawings, and installation guides into a single, professional PDF package directly from our product pages.
Select Items
Browse products and click "Add to Submittal" on the specific sections you need — specs, drawings, or install guides.
Compile Package
Batch multiple products into one comprehensive package. Your selections are automatically saved as you browse.
Download PDF
Generate a clean, branded PDF instantly, formatted perfectly and ready to email to your engineer or contractor.
Built Different. Built Better.
Every RCS product is backed by 30+ years of fabrication expertise, real-world field experience, and an uncompromising commitment to quality.
Custom Fabrication
Every product is built to your exact project specifications — no off-the-shelf guesswork.
Fast Turnaround
Most orders ship in 5 business days. Rush programs available for tight schedules.
Quality Guaranteed
Heavy-gauge galvanized steel, fully welded seams, and a warranty you can count on.
Expert Support
Our team helps you spec, configure, and troubleshoot — from quote to install.
Not Sure Which Product You Need?
Send us your old and new unit info, and our bid team will recommend the right solution and get you a quote — usually within one business day.