Basement How To & DIY

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

S23 E7: Richard Trethewey installs a sump pump
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How to Install a Sump Pump

There are a lot of reasons why a basement might take on water. Groundwater can seep in under the floor, downspouts could be positioned too close to the home. When a homeowner wanted to finish the basement for his daughter’s play area, he had to get to the bottom of the moisture problem first, and plumbing and heating expert Richard Trethewey knew a sump pump would solve it.
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Basement Waterproofing 101: A Comprehensive Guide

Need to stop water from coming into your basement? Use gutters, a drainage system, and interior waterproofing to keep your basement dry.
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How To Add a Basement Egress: Entrances and Window Wells

A basement egress allows easy access to below-grade space for convenience and safety. Read our guide to learn about the pros and cons of different available options.
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A Guide to Building a Home Gym In 6 Simple Steps

Learn how to turn a small, unused space in your home—like a basement storage room—into a sleek and functional home gym you can use.
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How To Get Rid of a Musty Smell in Your Basement

If musty odors are lurking in your basement, use our guide to eliminate those funky smells from your below-grade spaces for good.
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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 Turn Your Basement Into a Wine Cellar

If you love wine, a wine cellar is a great asset for your collection and your home. Here's how to build a wine cellar in your basement.
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How To Build a Basement Bar

A basement bar might be the perfect addition to your home. Here’s what to keep in mind when planning your subterranean entertaining oasis.
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How to Frame Out Basement Walls

Transform your basement into a more multifunctional space by adding walls.
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When Replace Bulkhead Doors and How to Replace Them

Our expert Tom Silva shows you how to know when it's time to replace dated bulkhead doors with new steel bulkhead doors.
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How To Level a Concrete Floor

Uneven concrete floor? This Old House general contractor Tom Silva teaches you how to fix it using wooden rails and self-leveling compound.
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Why Are These Foundations Crumbling?

Ask This Old House mason Mark McCullough investigates a strange issue happening to foundations in the Northeast
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How To Keep Your Basement Mold-Free

Learn top methods to prevent and eliminate mold in your basement. Get tips on moisture control, ventilation, and more from our experts.
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How To Switch Basement Lighting

Ask This Old House master electrician Scott Caron shows how to simplify your basement lighting system with one switch.
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How To Repair a Damaged Carrying Beam

This Old House general contractor Tom Silva teaches a homeowner how to repair some structural problems in his home.
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How To Install a Basement Laundry

Watch as Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner install a washer and dryer in his basement.
A man using a drill to install bulkhead doors.
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How to Replace Basement Bulkhead Doors

This Old House general contractor Tom Silva helps a homeowner install a new pair of basement bulkhead doors
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How To Install a Basement Bathroom

This Old House plumbing and heating expert Richard Trethewey shows how to rough-in the drainpipes for a basement bathroom.
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Basement Remodel: Mid-century Modern Guest Suite and Living Area

A finished basement suite entices friends and future grandparents in the best living space redo from the Search for America's Best Remodel 2015
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How to Install a Drain Pump for a Basement Sink

This Old House plumbing and heating expert Richard Trethewey shows you how to properly install a drain pump for your basement sink.
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How to Stop Your Basement From Flooding

Afraid of water in the basement? Avoid a flooding disaster with damage-prevention specialist Michael Milligan.
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How To Install and Maintain a New Dehumidifier Pump

One way to handle nasty moisture buildup in your home is to install a new dehumidifier pump. Read how to complete this do-it-yourself project in our step-by-step guide.
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How To Frame Walls for a Basement Room

This Old House general contractor Tom Silva walks us through how to frame walls to add a room to your basement.
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How To Prevent Household Plumbing Leaks and Make Upgrades

Household plumbing leaks can quickly cause significant water damage and costly repairs. Learn how to prevent leaks in our step-by-step guide.
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How To Install a Battery-Operated Backup Sump Pump

This Old House plumbing and heating expert Richard Trethewey shows how to keep a basement dry—even when the power goes out.
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3 Steps to Prevent Basement Leaks

A ruined basement upgrade is never a good surprise. Help prevent leaky mishaps with these 3 easy tips.
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An Unfinished Basement Gets a Masculine Makeover

An eerie, partially below-grade storage space becomes a fun and functional getaway for a hardworking dad
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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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Hydraulic Cement for Leaky Basements

Using the right product for patching holes where water seeps in will save you a trip back with a wet vac and a sump pump.
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Installing a Basement Sump Pump

This Old House general contractor Tom Silva demonstrates how involved putting in a sump pump can be
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Prepping Basement Walls for Drywall

This Old House general contractor Tom Silva reviews his best practices when building out walls on a concrete foundation

Basement Bonus Rooms

In this article, we’ll guide you through inspiring basement transformations and provide practical tips for maximizing your underground space.
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How to Frame Out Basement Walls

This Old House general contractor Tom Silva shows how to fur out concrete basement walls to get them ready for drywall