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Irvine HVAC Company

Air Duct Sealing in Irvine, California

Signs your ducts may be leaking

Ducts in an attic run through one of the hottest spaces in the house. When joints, boots or plenum connections leak, cooled air escapes into that heat and hot attic air can be pulled back into the system. Air duct sealing closes those gaps.

Sealing often improves comfort in distant rooms, reduces dust and helps the system reach its setpoint with less effort.

  • Rooms at the end of long duct runs are always less comfortable.
  • The attic feels unusually cool when the AC is running.
  • Dust lines around registers or on the carpet near walls.
  • Disconnected or crushed flexible ducts visible in the attic.
  • High energy use with a system that otherwise checks out.

Typical process

How duct sealing works

  1. STEP 1

    Find the leaks

    Tracing the duct system identifies loose connections, gaps and damage.

  2. STEP 2

    Repair first

    Separated or crushed sections are reconnected or replaced before sealing.

  3. STEP 3

    Seal the joints

    Mastic and approved materials are applied to seams and connections.

  4. STEP 4

    Confirm results

    Checking airflow at registers confirms air is reaching the rooms.

Mastic sealant being brushed onto a sheet metal duct joint in an attic

Local context

Attic ducts in Irvine homes

A large share of Irvine homes route ducts through the attic, where summer heat builds up. Leaks there cost comfort directly, especially in upstairs bedrooms.

Sealing works well alongside air duct cleaning and is worth considering before an HVAC system installation so the new equipment is not paired with leaky ducts.

Questions

Air Duct Sealing questions

More HVAC answers
Is duct tape good for sealing ducts?

Standard cloth duct tape tends to dry out and fail. Mastic and tapes rated for HVAC use hold up much better.

Can every duct be sealed?

Accessible ducts can usually be sealed. Ducts hidden inside walls or between floors may be limited to the connections that can be reached.

Related services

Often paired with air duct sealing

Rotating brush cleaning tool inserted into an open ceiling supply duct
13

Air Duct Cleaning

Remove built up dust and debris from supply and return ducts, with protected floors and a careful process.

Explore Air Duct Cleaning
New indoor air handler and insulated ducts installed in a bright attic
03

HVAC System Installation

Properly sized heating and cooling systems for Irvine homes, planned around your rooms, ducts and comfort goals.

Explore HVAC System Installation
Indoor air quality monitor on a kitchen counter in a bright home
12

Indoor Air Quality Testing

Measure humidity, particles and ventilation clues so improvements are based on data, not guesswork.

Explore Indoor Air Quality Testing

Talk with us about air duct sealing

Tell us what you are noticing and where in Irvine the property is, to start the conversation.

Contact us All services