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Serrato Heat and Air
Technician sealing duct joints with mastic

Ductwork

Duct Sealing in Oklahoma City, OK

Smell gas, smoke, or suspect carbon monoxide? Leave the building first, then call 911 or your gas utility from outside. Call us once you are safe — (327) 210-5999.

Ducts do not have to look damaged to leak. A duct system in an Oklahoma City attic can be intact end to end and still lose a meaningful share of the air you paid to cool — through joints, boot connections, plenum takeoffs, and return chases that were never sealed in the first place. Duct sealing is the unglamorous work of closing those gaps so more of the air reaches the rooms you are actually in.

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Where the leaks actually are

  • Unsealed joints and boot connections throughout the system
  • Plenum takeoffs that leak at the collar
  • Building-cavity returns — a joist bay or wall chase used as a duct
  • Supply leaks handing conditioned air to a 140-degree attic
  • Return leaks pulling attic air, dust, and insulation into the house
  • A dusty home and rooms that never quite keep up

How a duct system gets evaluated for leakage

  • Inspecting the accessible runs, joints, boots, and takeoffs
  • Identifying supply-side versus return-side leaks — they cause opposite problems
  • Checking for building-cavity returns common in older Oklahoma homes
  • Sealing with mastic and UL 181 tape, not cloth duct tape that fails in attic heat
  • The combustion-safety question a return leak can raise near a gas appliance
  • Whether to seal, repair, or rework — and sealing before sizing a replacement

What to expect when you contact us

  1. 01

    Evaluate the system

    We look at how and where the ductwork is losing air.

  2. 02

    Explain the pattern

    Supply leaks waste conditioned air; return leaks pull in attic air and can raise a safety question.

  3. 03

    Seal what is accessible

    We close joints, boots, takeoffs, and chases with materials that survive an Oklahoma attic.

  4. 04

    Sequence it right

    If a replacement is coming, we seal first — sealing changes the load, so it belongs before the quote.

The building-cavity return in older Oklahoma City homes

A lot of mid-century Oklahoma City housing uses a panned joist bay or a hallway wall chase as return ducting — unsealed by construction, and often the single biggest leak in the house. ENERGY STAR estimates that about 20 to 30 percent of the air moving through a typical duct system is lost to leaks. That figure is typical of duct systems generally, not a promise about your house — we have not measured yours, and we will not invent a number for it.

Why Oklahoma City chooses Serrato Heat and Air

We are a locally owned Oklahoma City company with more than ten years of experience, and heating and cooling is the only thing we do. We serve homes and businesses across the metro, we explain what we find in plain language, and the decision always stays yours. HVAC is not a side line for us — it is the whole business.

Serving Oklahoma City and nearby communities

We are based in west Oklahoma City and work across the metro, from Oklahoma City, Bethany, Warr Acres, Yukon, Mustang, and more. Coverage depends on your address, so contact us to confirm availability where you are.

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Serrato Heat and Air has earned 40 customer reviews across the Oklahoma City metro. Read them on Google.

Duct Sealing questions from Oklahoma City

Not for this. Cloth duct tape dries out and lets go in the heat of an Oklahoma attic — it is almost the worst choice for sealing ducts. Proper sealing uses mastic and UL 181-rated tape, which stay put. The name is misleading; the product fails at the one job it sounds built for.

We inspect the accessible runs, joints, boots, and takeoffs, and we know where systems in local homes tend to leak — especially building-cavity returns. Contact us and we will talk through how we would evaluate yours. We will describe what we can actually assess rather than claim a measurement we did not take.

ENERGY STAR reports that 20 to 30 percent of duct air is commonly lost to leaks, so closing those gaps means more of the air you paid for reaches the rooms. That is a figure for duct systems in general — we will not predict what your specific house will save, because we have not measured it, and anyone who quotes you a guaranteed number has not either.

Yes, when possible. Sealing changes how much air the house actually needs, which changes the sizing of a replacement. Sealing first means the new system gets sized to a tighter, more accurate load rather than to the leaks. It belongs before the quote, not after.

They can be a big part of it. A leaky return pulls air, dust, and insulation fibers straight from the attic into the system and back into your rooms. Sealing the return side reduces that source. It will not eliminate all dust — that is a filtration conversation too — but it closes one real path.

For accessible ductwork, sealing is done by hand at the joints, boots, and takeoffs from the attic or crawlspace. There are also from-the-inside methods for systems that are hard to reach. Ask us which approach fits your system and we will explain the trade-offs.

Related HVAC services

Duct Repair

One room that never gets comfortable, or vents that barely move air. Often the equipment is fine and a duct run came apart in the attic — cheaper to find than to guess at.

Learn more

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