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Insulation How To & DIY

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

Installing cellulose insulation in home attic
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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.

Choosing insulation for home
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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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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.

Installing fiberglass insulation
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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.

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 Seal Leaky Ductwork

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

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.

Maximizing impact of insulation
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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.

Insulating window weight pockets
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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

Insulating attic with fiberglass
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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.

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.

Choosing and using foam insulation at home
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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.

How to Insulate Your Basement

From preparation to installation, here's a how to insulate your basement.

Choosing the right insulation
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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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How to Insulate HVAC Ductwork

This Old House plumbing and heating expert Richard Trethewey helps a homeowner insulate his HVAC ductwork.

ASK S7 E7, sealing windows and doors for winter
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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.

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 Retrofit Cellulose Insulation

In this video, This Old House general contractor Tom Silva explains how to install cellulose insulation

How to Insulate an Old House

We share different types of insulation so you can select what works best for your home’s interior walls.

How to Cut Batts of Fiberglass Insulation

3 easy steps and neat trick to safely make tidy cuts in fiberglass insulation batts.

How to Install Insulation

Learn how to beef up your wall's weather protection in 4 easy steps.

Adding Attic Insulation

Can you blow insulation over existing insulation? How much is enough? We answer these questions and more.

How to Weatherstrip a Door

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

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 Insulate a Basement

This Old House general contractor Tom Silva shows how to warm up a chilly concrete wall

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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 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 how-to video, keep out the cold with This Old House general contractor Tom Silva

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.