Duct Sealing in Columbus - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Columbus

We dispatch our duct sealing crews to Columbus from our Cleveland office, and we’ve been making the run long enough to know the difference between a Clintonville bungalow with 1920s galvanized ducts and a Dublin subdivision built in 2005 with flexible plastic runs. That local knowledge matters because the fix for one is often wrong for the other. If your registers blow dusty air, your upstairs rooms never reach temperature, or your basement smells musty every time the AC kicks on, the problem is usually leaks in the ductwork, not the furnace itself. Call us at (361) 326-5060 for a free estimate. We’ll put the price in writing before we touch anything, and every repair is covered by our 365-Day Done Right Promise.

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Why Hollis Air Duct Cleaning Is Columbus’s Preferred Duct Sealing Company

We’ve built our reputation in Columbus on showing up inside the window, pricing in writing, and leaving the site clean. That’s The Garrison Standard, and it’s how every Hollis crew operates, whether we’re working on a German Village rowhouse or a Westerville colonial.

Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. And when you call (361) 326-5060, a live person answers the phone, 24 hours a day, 7 days a week. No voicemail loops. No callback queues. No waiting until Monday to schedule.

We’ve earned strong word-of-mouth across Franklin County because we don’t play pricing games. The price we write down before any work starts is the price you pay. If the repair fails within a year, we come back and make it right at no charge, including a free second visit. That’s not a slogan. It’s in writing on every job.

Air Duct Sealing in Columbus

Air Duct Sealing in Columbus means closing the gaps, cracks, and disconnected joints in your forced-air system so the air you’ve already paid to heat or cool actually reaches the rooms it was meant for. In a typical Columbus home, 20 to 30 percent of conditioned air leaks into attics, crawlspaces, or wall cavities before it ever hits a register. We find those leaks with pressure testing and camera inspection, then seal them with mastic and mesh rated for the specific environment, whether that’s a humid dirt-floor crawlspace in Olde Towne East or a dry attic in Powell.

A typical Air Duct Sealing job in Columbus runs $450 to $1,200 for a whole-system seal, depending on how much of the ductwork is accessible and whether we need to remove debris first. Homes with original galvanized ducts in Clintonville or the Short North often need source removal before sealing, which adds $300 to $600. Post-1990 suburban homes in Dublin or Westerville with flexible ductwork usually fall on the lower end if the runs are accessible from the basement or attic.

Pressure Testing Before We Seal

We pressurize your duct system and measure the leakage rate in CFM25, cubic feet per minute at 25 pascals of pressure. A typical pre-1950 Columbus home tests at 300 to 500 CFM25. We show you the number before and after. No guesswork.

Mastic vs. Tape in Moist Environments

Water-activated duct tape fails in Columbus crawlspaces within a season. We use UL-181B-FX rated mastic with fiberglass mesh, applied to a clean, dry surface. In dirt-floor crawlspaces common in Clintonville and Olde Towne East, we use mastic formulations rated for high-humidity contact.

Duct Sealing Services in Columbus

Duct Sealing Services in Columbus cover everything from spot-repair of a disconnected collar to full-system sealing after a camera inspection finds multiple failure points. We don’t sell sealing to every customer who calls. Sometimes the ducts are too far gone, and we tell you that straight. Other times, what feels like a duct problem is actually a dirty evaporator coil or a blocked return. Our techs diagnose first, then quote.

Most Duct Sealing Services we perform in Columbus fall into two categories: sealing original galvanized trunk lines and register boots in pre-1950 homes, or re-securing and sealing flexible plastic runs at air handler collars and sag points in post-1990 builds. The tools differ. The standard doesn’t. Written price before work starts. 365-Day Done Right Promise on every repair.

Source Removal Before Sealing

Sealing over rust flakes or dust accumulation traps moisture against the metal. In Clintonville, we regularly see spring failures due to, well, spring pollen and summer humidity cycles that coat duct interiors. We run rotary brush systems under negative air with HEPA filtration first. Then we seal.

Collar Reconnection and Support

Flexible ductwork kinks when it’s poorly supported. We reinstall with proper straps and minimum bend radius, then seal the collar with mastic. Fixing the sag without sealing the joint just moves the leak. Sealing the joint without fixing the sag guarantees it fails again.

Trusted Brands We Service in Columbus

Our crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, the same tools commercial HVAC contractors use on schools and medical buildings in the Columbus metro. We stock filtration products from Honeywell, Aprilaire, and Guardsman for customers who want to upgrade their return air filtration while we’re already in the system. Because we dispatch from our Cleveland office with a fully stocked van, most Columbus jobs don’t wait on parts. If your ductwork needs a specialized register boot or collar size common to 1920s Columbus bungalows, we’ve likely handled the same fitting in Clintonville or the Short North before.

Common Duct Sealing Problems We See in Columbus Homes

• Rust-flaking galvanized ducts in Clintonville and Olde Towne East. Columbus’s humid summers cause internal condensation on original metal ductwork. The rust flakes off, creating gaps that look like leaks but are actually material failure. Sealing over the flaking surface without source removal wastes money; the mastic delaminates within a season.
• Kinked flexible runs in Dublin, Westerville, and Pickerington. Post-1990 suburban homes use flexible plastic ductwork that sags between supports, especially in attic runs over long spans. The kink restricts airflow, and the collar at the air handler pulls loose under static pressure. Sealing the joint without correcting the support geometry guarantees recurrence.
• Disconnected trunk collars in dirt-floor crawlspaces. Older Columbus neighborhoods often have basement or crawlspace duct runs sitting on moist soil. The constant humidity degrades tape adhesives and causes metal collar separation. We use mastic rated for high-moisture contact and add mechanical support so the joint doesn’t flex.
• Register boot gaps from decades of vibration. In the Short North and German Village, original plaster-and-lath construction means register boots were often fit loosely to wall cavities. Decades of furnace cycling vibrates the boot away from the duct. We seal the gap with mastic and mesh, then secure the boot to framing so it doesn’t reopen.

Pricing for Duct Sealing in Columbus, OH

We Also Serve Cities Near Columbus

Our crews regularly work in Columbus and the surrounding suburbs, including Westerville, Powell, Dublin, and Hilliard. Each community has its own ductwork patterns, from the mid-century ranch homes of Westerville to the newer subdivisions in Powell with attic duct runs. Wherever you are in the Franklin County area, our Duct Sealing team brings the same written pricing and 365-Day Done Right Promise.

FAQs About Duct Sealing in Columbus