Ductwork & Duct Services

Improve HVAC efficiency and airflow with top-rated ductwork repair, sealing, and installation solutions.

Custom Ductwork Solutions We Offer

Eliminate hot and cold spots throughout your home with professional ductwork sealing and airflow optimization built for complete year-round comfort

Custom ductwork design and installation

Tailored duct layouts engineered for new builds, additions, or full replacements to deliver balanced airflow across every room.

Duct repair, sealing, and airflow optimization

Fix leaks, patch damaged sections, and rebalance system pressure to stop energy loss, eliminate hot and cold spots, and restore peak HVAC performance.

Replacement of damaged or outdated duct systems

Remove failing, poorly insulated, or mold compromised ductwork and install clean, high-performance ducting that restores maximum airflow, system efficiency, and home comfort.

Insulation upgrades to reduce energy loss

Diagnose energy leaks in unconditioned spaces like attics and crawl spaces, then install high-performance insulation to keep conditioned air at your target temperature and lower monthly utility bills.

Ready to Get Started?

Schedule your ductwork service today and let our experienced team provide safe, dependable solutions you can trust.

Phone Number

(540) 588-6467

Trusted by Homeowners & Businesses

We’re proud to provide trusted HVAC services for homeowners and businesses throughout the area. Read what our customers say about our heating, cooling, and home service solutions.

    
 
 
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   Brian Robinson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Quality work, really appreciated the communication, good prices, reliable. I recommend these guys!
  
 
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   Emily Witt 
 
 
 
 Trustindex verifies that the original source of the review is Google. Gary is AMAZING!  He called at 8am on Saturday, July 4th and was at my house by 8:30.  He not only fixed my AC but shared tips on things to do.  Honest, trustworthy, and affordable!!!
  
 
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   Amy Lindsey 
 
 
 
 Trustindex verifies that the original source of the review is Google. The Viar Bros exceeded our expectations. Garry and his team were a pleasure to work with from start to finishâ€”responsive communication, great attention to detail, and a clear commitment to quality. Our basement project turned out beautifully. Weâ€™ve already saved Garryâ€™s number and look forward to working with him on many future projects.
  
 
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   Carissa Brandenburg 
 
 
 
 Trustindex verifies that the original source of the review is Google. Garry is very reliable and communicates everything well. I have called Garry several times for different jobs. He shows up when he says he will and explains everything in detail. I would reccomend him to anyone and will be using him again.
  
 
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   Charlene Oliver 
 
 
 
 Trustindex verifies that the original source of the review is Google. Gary is very responsive. my hot water heater was  leaking at 10:30 pm when we discovered it. Spewing  water. FourHe walked me thru what to do with promise to be at house early morning which did and was here by 8:30 am.  He is very reach able â€” with great customer service.   He also replaced two A/C s  very happy with the service.
  
 
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   Victoria Abner 
 
 
 
 Trustindex verifies that the original source of the review is Google. Canâ€™t recommend Viar Bros enough! Local family business that I will continue to stand behind. Weâ€™ve used their services several times and have never been disappointed!
  
 
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   Robert Alegre 
 
 
 
 Trustindex verifies that the original source of the review is Google. Gary is great to work with ðŸ‘
  
 
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   Seth Thompson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service! Garry went above and beyond to help us out and everything is working as it should!
  
 
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   Donald Shepherd 
 
 
 
 Trustindex verifies that the original source of the review is Google. Our local church has dealt with Viar Bros for over 20 years, we had our system vandalized 3 times since January 2025. Viar has repaired and replaced the Freon each time and have always changed us a fair price. A couple of years ago we had them replace our heating system they did and awesome job quickly and efficiently. If you need an HVAC Tech give these folks a call.

Frequently Asked Questions

Have questions about your home’s ductwork? Here are answers to common questions about airflow, duct repair, sealing, and replacement. If you need help with a custom duct layout or an upcoming project, reach out anytime we’re always happy to help.

How do I know if my ductwork needs repair or replacement?

Common signs include unusually high energy bills, inconsistent temperatures or hot/cold spots between rooms, excessive dust throughout your home, noisy airflow, or visible sagging and leaks in crawl spaces or attics.

How much can damaged ductwork increase my energy bills?

Leaky or uninsulated ducts can lose up to 20% to 30% of the conditioned air moving through the system. Sealing and insulating your ductwork helps your heating and cooling unit run far more efficiently and reduces monthly utility costs.

How long does ductwork installation or replacement take?

Most residential ductwork replacements or custom re-routing projects are completed in 1 to 2 days, depending on the size of your home and accessibility in attics or crawl spaces.

Do you custom-design ductwork for home additions or new builds?

Yes! We design and install custom ductwork layouts engineered specifically for your home’s square footage and layout to ensure balanced, quiet, and maximum airflow to every room.

What is duct sealing, and how does it work?

Duct sealing involves finding and closing gaps, cracks, and loose connections in your duct system using specialized mastic sealant or foil tape. This prevents conditioned air from leaking into unconditioned spaces like attics or basements.

Why are some rooms in my house hotter or colder than others?

Airflow imbalances are often caused by undersized ducts, disconnected duct runs, poor insulation, or leaky seams. We inspect and rebalance your airflow distribution so every room stays comfortable.

How often should home ductwork be inspected?

We recommend having your ductwork inspected every 3 to 5 years, or whenever you install a new HVAC unit, notice a spike in energy bills, or complete a major home remodel.

Can bad ductwork ruin my heating and cooling equipment?

Yes. Restricted or leaking ductwork forces your air conditioner and furnace to work significantly harder to reach target temperatures, which leads to premature wear and tear, motor strain, and costly equipment breakdowns.

Do you insulate ductwork in attics or crawl spaces?

Absolutely. Insulating ductwork located in unconditioned spaces like attics or crawl spaces prevents thermal loss, stops duct condensation (sweating), and protects your air quality.

Do you provide free estimates for duct replacement or repair?

Yes, we provide straightforward, transparent estimates. We will evaluate your existing system, explain your best repair or replacement options, and give you clear pricing before any work begins.

Serving the Roanoke Valley Since 1984

Viar Brothers has proudly served homeowners and businesses throughout Roanoke, Vinton, Salem, Botetourt County, Bedford, and surrounding areas since 1984. Our experienced team provides dependable HVAC services backed by decades of local experience.