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Insulation in an attic

Read This Before You Finish Your Attic

Whether you envision your house's top floor as an away-from-it-all master suite, a quiet home office, or a kids' hangout, don't lift a finger until you've read TOH's expert advice.

All About Insulation

Insulation in your home increases interior comfort, while decreasing heating and cooling costs.

Best Smart Home Products

The pros at share their top product picks, including "smart" bulbs, locks, smoke detectors, and more

Ask This Old House Know-How: All About Stone Wool Insulation

TOH affiliate Nick Schiffer discusses the benefits of mineral wool insulation

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


200 Years of Building Sheathing Technology

Kevin O'Connor and building science expert Joe Lstiburek discuss the benefits of using OSB sheathing


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

Is it Worth It? Honeycomb Shades

With these draft-blockers, it's a breeze to cozy up your hive. Two twists on the classic now promise better-than-ever energy savings


How to Insulate a Basement

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

Insulation Education

Proper insulation is the best way to maximize comfort and minimize energy bills


5 Steps to Finishing an Attic

This Old House's Two-Minute Expert explains what goes into creating a bonus room under the rafters


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


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

Structural Insulated Panels at Carlisle

These foam-core panels at Carlisle will stand for a century and keep heating costs down

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.

New Insulation Options

Companies make materials for almost any need, including one that gives people with allergies one fewer tormenter

Your Basement: Why Add on When You Can Add Under?

Your basement is valuable real estate, and it's an ideal place for the low-cost extra bedroom, family room or workout space you've always wanted