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Insulation How To & DIY

Improve the value of your home by discovering our insulation step-by-step tips & ideas.

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Adding Attic Insulation

Insulating your attic can save money on energy bills and keep your home warmer. We cover how to add insulation to your attic, how much it costs, and more.
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How to Conduct a Home Energy Assessment

Home technology expert Ross Trethewey shows a homeowner where her energy consumption is going and how to save some money moving forward.
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How to Insulate an Attic Door

Yes, your attic is insulated, but the access hatch probably isn’t. Here are a few ways to insulate the attic door, save energy, and save money.
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How to Insulate Around Recessed LED Fixtures

Scott Caron offers advice on how to keep your home energy-efficient when using recessed lights
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How To Insulate a Basement Ceiling

Does it make sense to insulate your basement ceiling? Our guide includes tips and instructions on how to insulate a basement ceiling.
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How to Weatherstrip a Door

Close the gap in your door to stay free from drafts, eliminate air leaks, and maintain energy efficiency.
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How to Insulate Your Basement

From preparation to installation, here's a how to insulate your basement.
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How to Maximize the Impact of Insulation

Ask This Old House general contractor Tom Silva shares some tips for insulating an attic.
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Things to Know About Choosing Insulation

Ask This Old House general contractor Tom Silva discusses the options for insulation with host Kevin O’Connor
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Tips for Using Stone Wool Insulation

It’s efficient, easy to install, and incredibly effective; hear what Tom Silva has to say about this versatile insulation product.
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Mind the Window Gaps

If you can feel a breeze around your closed windows, consider these quick-and-easy ways to block drafts. Such stopgap measures eliminate air leaks by sealing sash perimeters from indoors. Come spring, add or replace weatherstripping for a longer-lasting fix
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How to Seal Leaky Ductwork

Ask This Old House plumbing and heating expert Richard Trethewey shows an innovative new way to seal ducts from the inside
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How to Insulate HVAC Ductwork

This Old House plumbing and heating expert Richard Trethewey helps a homeowner insulate his HVAC ductwork.
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Insulation Tips for Every Corner of Your Home

Keep your home cozy and save money with this round-up of our top insulation tips for your home.
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How to Refresh Cellulose Insulation in the Attic

In this video, This Old House general contractor Tom Silva explains how to refresh cellulose insulation in the attic.
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How to Choose and Use Foam Insulation

This Old House general contractor Tom Silva explains the wide world of spray-foam insulation.
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How to Seal Windows and Doors for Winter

Tom Silva shows you how to keep cold air from coming through windows and doors.
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How to Insulate an Attic with Fiberglass

This Old House general contractor Tom Silva shows affordable ways to create an energy-efficient attic.
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How to Install Fiberglass Insulation

This Old House host Kevin O'Connor shows how to fill gaps and make a space cozier and energy efficient.
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3 Common Insulation Materials Used in Old Homes

If you live in an older home, understanding what pads your walls is essential to keeping your family safe. Here are three common types of insulation found in old homes and their potential hazards.
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How to Insulate a Basement

This Old House general contractor Tom Silva shows how to warm up a chilly concrete wall
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How to Choose and Use Insulation

This Old House general contractor Tom Silva explains how to choose insulation.
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How To Insulate a Wall: A Comprehensive Guide

Here are some simple and easy tips for installing wall insulation to help you save money and become more energy-efficient.
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5 Steps to Finishing an Attic

This Old House's Two-Minute Expert explains what goes into creating a bonus room under the rafters
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How to Insulate Window Weight Pockets

In this how-to video, This Old House general contractor Tom Silva shows an energy-efficient way to insulate old windows
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How to Insulate an Attic

In this how-to video, This Old House general contractor Tom Silva and host Kevin O'Connor demonstrate the proper way to insulate an attic
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How to Insulate a Window with Sash Weights

In this video, This Old House general contractor Tom Silva explains how to insulate a window with sash weights.
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How to Retrofit Cellulose Insulation

In this video, This Old House general contractor Tom Silva explains how to install cellulose insulation
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How to Add Wall Insulation in an Old House without Damage

This guide explores insulation options and techniques suitable for older homes, helping you make the best decisions and avoid damage.
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From the Ground Up: Roofing and Siding

This Old House general contractor Tom Silva shows how he installs roofing and siding to keep a house buttoned up and dry.
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How to Cut Batts of Fiberglass Insulation

3 easy steps and neat trick to safely make tidy cuts in fiberglass insulation batts.
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How to Insulate a Crawl Space

To reap the temperature-regulating benefits of a crawl space, it must be adequately insulated. Read on to learn why you should insulate your crawl space and how to do so.