Custom ductwork, built in our shop and installed in your home.
In-house sheet metal fabrication and ductwork services for homes and businesses across the Flathead Valley and Gallatin Valley.
Your ductwork is the system behind the system. If it leaks, sags, or doesn't fit properly, your furnace and air conditioner work harder than they should. Energy bills go up. Comfort goes down. And no amount of new equipment will fix a duct system that wasn't built right.
Western Sky fabricates custom ductwork in-house at our Columbia Falls shop. We measure, cut, bend, and assemble sheet metal to fit your home's exact specifications. Every piece is built to order. When your home has unusual angles, tight spaces, or non-standard layouts, we build ductwork that fits rather than forcing off-the-shelf parts to work.
Our NATE-certified team handles everything from initial measurement through final installation. Whether you need a full duct system for new construction, replacement ductwork for an older home, or custom transition pieces for an addition, we do the fabrication and the install.
What We Build and Install
Our in-house fabrication shop handles the full range of residential and commercial ductwork: custom trunk lines and branch runs, specialty fittings and transitions, register boots and takeoffs, and round, rectangular, and oval duct in custom sizes. We also handle duct replacement for aging systems, duct sealing to stop air leaks, and airflow testing to make sure your system delivers even heating and cooling to every room.
If your home was built with non-standard dimensions or your remodel created configurations that standard parts can't handle, that's exactly what our shop is set up to solve.
Why In-House Fabrication Matters
Most HVAC companies order their ductwork from a supplier and wait for delivery. If your job needs a custom piece, that wait gets longer. Western Sky builds it in our own shop. That means faster turnaround, tighter tolerances, and direct quality control from fabrication through installation.
Our team serves both the Flathead Valley from Columbia Falls and the Gallatin Valley from Bozeman. Both crews are NATE-certified. When your ductwork is built by the same team that installs it, every piece fits the first time.
Ready to Schedule?
Call or schedule online for a ductwork consultation. Columbia Falls: (406) 296-3336. Bozeman: (406) 229-8080. We'll assess your system and give you an honest recommendation.
What we offer
Frequently asked questions
What is custom ductwork and why does it matter?
Custom ductwork is sheet metal fabricated to match your home's specific dimensions and layout. Standard ductwork comes in fixed sizes that may not fit your space properly. Custom fabrication eliminates gaps, reduces air leaks, and ensures consistent airflow throughout your home.
How do I know if my ductwork needs to be replaced?
Signs include uneven temperatures between rooms, excessive dust, rattling or popping noises from your ducts, and higher-than-expected energy bills. Older ductwork may also have deteriorating seals and joints. We'll inspect your system and tell you whether repair or replacement makes more sense.
Can you build ductwork for older homes with unusual layouts?
Yes. Older homes, historic renovations, and additions often have spaces that standard ductwork doesn't fit. Our shop fabricates custom pieces to match any configuration, including tight joist bays, angled ceilings, and non-standard wall cavities.
Do you handle ductwork for new construction?
Yes. We work with builders and homeowners on new construction projects across the Flathead and Gallatin valleys. We design and fabricate the full duct system to match the home's floor plan and HVAC layout.
Ready to schedule?
Call your local team or send us a message.