Duct Repair & Sealing in Plano - Leakage Measured, Then Priced in Writing

Trusted Duct Repair & Sealing for Plano Homeowners

Most Plano homes built between 1985 and 2010 lose 20-30% of conditioned air through leaks in the duct system before it ever reaches the registers. Duct repair and sealing in Plano typically runs $450-$1,800 depending on whether we’re sealing accessible joints with mastic or replacing collapsed flex runs in the attic, and we complete most jobs in a single visit with a written price agreed before any work starts. Since 2013, CleanRun has documented the inside of every duct run with before-and-after photography on every visit, and every repair we make is backed by our 365-Day Done Right Promise in writing. Call (469) 452-7766 for a free estimate with no obligation.

Call (469) 452-7766

We’ve worked in Plano long enough to know the patterns. The flex duct in Willow Bend attics dries out after a decade of North Texas heat cycling. The metal ductwork in older Deerfield homes develops seam separation where the original tape has turned to dust. In Legacy West townhomes, we regularly find builder-grade connections that were never sealed at all. Our crews carry mastic sealant, mechanical fasteners, and replacement flex duct on every truck because we’ve learned what Plano homes actually need. Every technician is background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews.

What Our Duct Repair & Sealing Service Includes

Duct Sealing

Duct sealing closes the gaps, joints, and seams where conditioned air escapes into your attic, crawl space, or wall cavities. In Plano, we most often find leaks at the plenum connection, the sheet metal box that distributes air from your HVAC unit into the duct runs, where temperature swings from 105°F summers to hard freezes cause expansion and contraction that breaks factory seals. CleanRun seals these joints with water-based mastic sealant, a thick paste that remains flexible for decades, applied over fiberglass mesh for structural reinforcement. We pressure-test the system before and after to measure the improvement, and the result is photographed and included in your documented photo record.

Flex Duct Repair

Flex duct, the insulated flexible tubing common in Plano homes built after 1990, collapses when supports fail, gets punctured by roofing nails or rodents, or simply degrades from UV exposure in attic spaces. We replace damaged flex duct with new R-8 insulated runs, the current code standard for North Texas, supported at proper intervals to prevent sagging that creates airflow restrictions. In Plano’s Parker and Kings Ridge neighborhoods, we’ve replaced hundreds of flex duct runs that original builders installed with inadequate support spacing. Every replacement is sized to match your system’s CFM requirements and sealed with professional-grade clamps and mastic, not the zip-tie shortcuts we often find.

Metal Duct Repair

Galvanized steel ductwork, standard in Plano homes built before 1990, develops rust at seams where condensation collects, separates at longitudinal joints from vibration, or corrodes where dissimilar metals contact. We repair metal duct by cutting out damaged sections, fabricating replacement pieces on-site, and sealing with mastic and mechanical drives, the interlocking metal fasteners that hold sheet metal joints under pressure. For Plano’s historic homes in Old Towne and Haggard Park areas, we’ve preserved original galvanized systems that still have decades of service life when properly maintained. The repair is photographed at each stage and included in your job documentation.

Duct Insulation

Duct insulation prevents thermal loss as air travels through unconditioned spaces, your attic in summer can reach 140°F, which reheats cooled air before it reaches your bedrooms. We install formaldehyde-free fiberglass insulation with vapor-barrier backing, secured with mechanical fasteners and sealed tape, not the compression-wrap that degrades in Texas heat. In Plano’s newer construction, particularly in Windsong Ranch and Trinity Falls, we’ve found that builder-grade insulation often compresses to half its original thickness within five years. We specify insulation rated for the full R-value at installed thickness, and we photograph the before condition and finished installation for your record.

Mastic Sealant Application

Mastic is the professional standard for sealing duct joints, a thick, water-based compound that brushes on and cures to a flexible, durable seal unlike foil tape, which degrades and fails within 3-5 years in attic conditions. We apply mastic with a minimum 2-inch brush overlap on all sides of every joint, reinforced with fiberglass mesh at stress points, following SMACNA guidelines for residential duct sealing. In Plano, where summer attic temperatures stress every adhesive, we’ve tracked our mastic applications and found zero failures at five-year follow-ups. The application is photographed before the mastic cures so you can verify coverage, and the pressure-test results are recorded in your written job summary.

Air Leak Repair

Air leaks occur at disconnected duct runs, damaged boots, the metal connection between duct and floor or ceiling register, and failed sealing at the air handler cabinet. We locate leaks using a combination of visual inspection, smoke pencil testing, and digital manometer readings that quantify pressure loss in inches of water column. In Plano’s Prestonwood and Glenhollow Estates, we’ve found that previous “duct cleaning” companies often dislodge connections without repairing them, leaving homeowners with higher utility bills than before. Every leak we repair is documented with a photograph showing the condition we found, the repair method used, and the post-repair pressure test result.

Signs You Need Duct Repair & Sealing Right Now

• Rooms that never reach the thermostat setting. When your master bedroom stays 6°F warmer than the hallway in July despite the AC running continuously, the duct run serving that room is likely disconnected, crushed, or leaking into the attic. We see this weekly in Plano’s 1990s-era subdivisions where original flex duct has collapsed at a support point.
• Dust accumulation around registers despite regular filter changes. If you’re wiping gray streaks from ceiling vents every two weeks, your return duct may be pulling attic air through a leak, bringing fiberglass particles and construction dust with it. This is especially common in Plano homes with return chase leaks, where the builder used the wall cavity as a duct without proper sealing.
• Utility bills that spike without rate increases or usage changes. A 30% air loss through duct leaks forces your HVAC system to run longer cycles to achieve the same temperature, and in Plano’s summer peak, that translates to $80-$150 monthly overruns we’ve documented on customer bills. The pattern is consistent: high summer bills that drop significantly after sealing.
• Whistling or rushing air sounds from walls or ceilings. These noises indicate high-velocity air escaping through a gap, often at a disconnected boot or a split seam in metal duct. In Plano’s Windhaven Park and Russell Creek neighborhoods, we’ve traced whistles to builder-grade tape that failed within seven years of construction.
• Musty odors when the system first cycles on. Leaks in return duct draw humid attic air into the system, where moisture condenses on the evaporator coil and breeds microbial growth. Plano’s spring humidity, often 75%+, makes this worse. The smell is a symptom; the cause is a duct leak that needs sealing, not just a deodorizing treatment.

Before

After

Our Duct Repair & Sealing Process - Step by Step

1. 1
   System inspection and pressure test. We start with a visual assessment of accessible ductwork and a digital manometer test that measures static pressure and identifies leak zones. In Plano, we typically find the worst leaks within 10 feet of the air handler, where temperature differentials and vibration are highest. The pressure reading is recorded in your written job scope.
2. 2
   Photographic documentation of existing conditions. Before touching anything, we photograph every duct run, joint, and register boot from inside and outside the duct where accessible. This becomes the “before” half of your documented photo record, and it’s delivered with your final invoice. We started this practice in 2013 and have maintained it on every job since.
3. 3
   Written scope and price agreement. Based on findings, we deliver a written scope with line-item pricing for each repair or sealing operation. Haven Standard Clause 1 requires this price to be agreed in writing before work begins, no exceptions. You’ll know exactly what each repair costs and why before we open a single tool case.
4. 4
   Repair and sealing execution. Our technicians perform the agreed work using professional-grade equipment, mastic sealant from Guardsman for high-temperature durability, and replacement flex duct or metal fabrication as specified. Every joint is sealed, every support is properly spaced, and every repair is photographed at completion for your record.
5. 5
   Post-repair pressure test and documentation delivery. We rerun the pressure test to quantify improvement, typically seeing 15-25% static pressure recovery in sealed systems. Your final deliverable includes the written scope, before-and-after photographs of every duct run, pressure test results, and the 365-Day Done Right Promise in writing. This documentation is yours to keep for warranty claims, home sale disclosures, or your own records.

How Much Does Duct Repair & Sealing Cost in Plano?

Duct Repair & Sealing Near Plano - Our Service Area

CleanRun serves Plano and the surrounding communities with regular scheduling throughout the week. We work in Allen and Richardson weekly, with typical appointment availability within 3-5 business days. Our crews also cover Frisco, Carrollton, McKinney, Garland, Lewisville, Dallas, Irving, Rockwall, and Flower Mound from our Plano-based dispatch. Drive times to Frisco or McKinney run 20-35 minutes in typical traffic, so we schedule those routes to minimize customer wait without the artificial urgency of “limited slots.” Every appointment receives the same documented photo record and written price guarantee, regardless of location.

Frequently Asked Questions - Duct Repair & Sealing in Plano

Schedule Your Duct Repair & Sealing Service in Plano Today

Call (469) 452-7766 to schedule your free estimate. A live person will answer, schedule an inspection at your convenience, and our technician will arrive with a written price before any work starts, every time. You’ll receive a documented photo record of every duct run, the 365-Day Done Right Promise in writing, and the accountability that comes from a company that’s operated under the Haven Standard since 2013. No coupons, no surprises, no vacuum noise.

Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Plano since 2013.