How to properly insulate your home's ductwork
In short: Learn the essential steps for sealing and insulating ducts to improve efficiency, guided by heating expert Richard Trethewey.
The video demonstrates how to manage airflow and seal leaks using specific materials. The process begins by checking the furnace blower motor speed and adjusting wires if necessary to reach the lowest speed. To seal straight runs, apply continuous foil tape to longitudinal seams, and use duct mastic with a paintbrush on elbow joints.
For the insulation itself, the guide covers cutting foil-faced fiberglass to size, wrapping it around ducts, and securing it with tape. It also details the installation of preformed insulation, which involves using a plastic cap on the duct end and pulling the insulation over the length of the duct.
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Sources
- Summary by Intellect · source: How to Insulate Ductwork | Ask This Old House
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