Duct Repair & Replacement in Fort Collins, CO

Here's a number that surprises most homeowners: according to ENERGY STAR, the average house loses 20–30% of its heated and cooled air through leaky, disconnected, or crushed ductwork. Your furnace and AC work perfectly — and up to nearly a third of what they produce never reaches a room. Duct repair fixes the delivery system so the equipment you already own can actually do its job.

We find and seal duct leaks, repair damaged runs, and replace ductwork that's beyond saving, in attics, crawlspaces, and basements across Fort Collins and Larimer County.

Losing air to your attic? Call (970) 555-0100 to request a quote, or check availability online.

Signs your ductwork is the problem

Duct issues disguise themselves as equipment problems. Before you blame the furnace, check for these:

• Some rooms are always too hot or too cold while others are fine
• Weak airflow from some vents, strong from others
• Excessively dusty house no matter how often you clean
• Energy bills climbing while the equipment is relatively new
• The system runs longer than it used to for the same result
• Musty or attic-like smells when the system runs
• Visible disconnected, crushed, or sagging ducts in the attic or crawlspace
• Rooms that never quite get comfortable no matter the thermostat setting

If your equipment is under 10 years old but comfort is poor, the ducts are the prime suspect.

Repair vs. replacement: how we decide

Not every duct problem needs new ductwork. Here's our honest breakdown:

Repair and seal when:

• Leaks are at joints, connections, and register boots — the most common failure points
• Ductwork is otherwise intact and properly sized
• A section is crushed or disconnected but the rest of the run is sound
• Insulation is thin but the duct itself is fine (we can add wrap)

Replace when:

• Flexible duct is kinked, compressed, or chewed through in multiple places
• The original ductwork is undersized for the system — no amount of sealing fixes wrong sizing
• Old ductboard is delaminating or growing mold from past moisture
• Layout is fundamentally bad: long tortured runs with sharp bends strangling airflow

We pressure-test and inspect before recommending either. Sealing good ducts costs far less than replacing them, and we'll never sell you replacement when sealing does the job.

How duct sealing and replacement work

1. Inspection. We map your duct system — attic, crawlspace, basement — and check every accessible joint, run, and boot. Photos so you see what we see.
2. Your quote. Sealing priced by the system; replacement priced per run with material options explained.
3. Sealing. We seal joints and connections with mastic (the thick brush-on sealant that actually lasts; not duct tape, which dries out and fails) and mechanically fasten loose connections.
4. Replacement. Old runs come out; new R-8 insulated flex or rigid metal duct goes in (R-8 is the insulation rating — higher numbers mean better heat resistance), properly sized, supported every few feet so it doesn't sag, with sealed connections at every joint.
5. Verification. We run the system and measure airflow at the registers — you should feel the difference immediately, and we confirm it with readings.

Fort Collins duct realities

Our housing stock gives ducts a hard life. Attic installations bake every summer: flex duct sags between supports, insulation compresses, and connections pull apart from thermal cycling. Crawlspace ducts in older homes sit in dampness and become rodent highways. New construction in the growth corridors sometimes has ducts installed fast rather than well: sharp bends, over-long runs, and boots never sealed to the drywall. And many homes still carry the original ductwork from a 1980s furnace, now feeding a modern high-efficiency system it was never sized for.

What affects the cost of duct work

• Scope: sealing a system vs. replacing every run is a different project entirely.
• Accessibility: open basement: fast. Tight crawlspace or 140-degree attic: slower.
• Material: insulated flex vs. rigid sheet metal; metal costs more and lasts longer.
• System size: more runs, more work.
• Combined projects: pairing duct replacement with a furnace or AC install saves on labor since we're already in the mechanical spaces.

Related services: Air Duct Cleaning, Furnace Installation, AC Installation

Frequently Asked Questions

Call (970) 555-0100 for duct repair and replacement in Fort Collins, CO. Fix the delivery, and the equipment finally gets to shine.