Skip to content
Vandiver Heating & Air
Mastic being brushed onto a duct boot connection in an attic.

Indoor Air Quality

Duct Sealing in Woodstock, GA

Duct leakage is the most expensive problem in a house that nobody can see. Air you paid to cool goes into the attic through failed mastic, disconnected boots, and crushed flex, and sealing it is usually cheaper than the equipment upgrade people reach for first.

We find it with a manometer and a look in the attic, not by assuming it is there.

What it does

  • Stops conditioned air being delivered into an attic or a crawlspace
  • Stops the return pulling unconditioned, unfiltered air into the system
  • Improves the rooms at the end of the run, which is usually the actual complaint
  • Lowers static pressure where the leakage was masking a restriction

Who it's for

  • Houses where one end of the house is never right
  • Systems with high measured static pressure
  • Homes with flexible duct in a vented attic, which is most of the 2000s stock here
  • Anyone about to replace equipment, since new equipment on bad ducts underperforms

What's included

  • Total external static pressure measured, which is what says whether the duct system is the problem
  • Accessible runs inspected for disconnects, crushed flex, and failed mastic
  • Boots and plenum takeoffs sealed with mastic rather than tape, because tape lets go
  • Return leakage addressed, which is the half most people skip and the half that pulls attic air

Usually added during a tune-up or an install

Questions people ask before booking

  • Does it need maintenance?

    No. Properly applied mastic is a permanent repair. What is worth re-checking is the flex itself, which sags and gets crushed by anything stored on top of it.

  • Can it be done during another visit?

    Accessible sealing often can be, during a tune-up or an install. A whole-system sealing job in a tight attic is scheduled on its own and we will tell you which one yours is after we have been in the attic.

  • How much will this save me?

    We will not give you a number, and be careful with anyone who does before they have measured your ducts. What we can tell you is what your static pressure reads, where the leaks are, and what the rooms at the end of the run do afterwards — which is the thing you actually notice.

Available across 10 towns in Cherokee County and the north metro. See where we work.

Book this service

  1. 1. What's going on
  2. 2. Where
  3. 3. You
What is happening, and how urgent it is
What's going on? (required)
Which system? (required)
Is this an emergency? (required)
Call (770) 555-0187Book a service call