Crawl Space Insulation: What You Should Know

Insulation in your basement crawl space can make your whole house more efficient. Here's how to install it in your space.

Crawl Space

Crawl Space

Photo by: unknown

unknown

By: Caroline Shannon-Karasik
Similar Topics:

Crawl space insulation, as a part of overall home air sealing and insulation, helps maintain your entire home's energy efficiency. Without insulation, heat and cool air are easily lost through the floor. Insulation also helps to preserve the air quality and reduce energy costs. There are two types of crawl spaces - ventilated and unventilated - and each requires its own form of insulation. The goal, however, is the same: to enclose the space in a thermal envelope.

Rustic and Refined: Unfinished Basement Overhaul

See All Photos

Unused Space Gets an Update

Reclaimed Room Divider

Charging Station

Open Storage Room Divider

Concealed Room Divider Storage

Lounge Area

Neutral Grays

Reading Nooks

Nook Upholstery

Nook Outlets

Ceiling Detail

Shag and Concrete

Polished Concrete

Home Office

Mini Kitchen

Porcelain Wood-Look Flooring

Activity Area

Industrial Storage

Metal Tabletop

If the crawl space is ventilated, which is ideal because it aids in the elimination of moisture, then fiberglass insulation can be easily installed under the subfloor between the floor joists. It is important to secure insulation and cover it with a vapor barrier in order to prevent moisture and the mold that often follows close behind.

If your crawl space isn't ventilated, insulate the walls of the crawl space rather than the subfloor of the room above. This requires less insulation and will eliminate the need to insulate ducts and pipes, separately.

You may also want to install a polyurethane vapor barrier over the dirt floor for further protection. The barrier may be covered with sand to keep it from getting damaged.

While crawl space insulation may be installed by a handy homeowner, you might consider using a professional. They'll clean up and properly dispose of old insulation and often spray the space with bacteria - and fungicides.

Repairing Basement Walls, Floors, and Ceilings

See All Videos

Next Up

Basement Insulation Options and Solutions

Whether your basement is finished or not, proper insulation is important for temperature control and the prevention of moisture. Choose a basement insulation option that is best suited for your home and budget.

Insulating a Basement Floor

Make your finished basement warm and inviting by installing floor insulation.

Insulating Basement Walls

Basement insulation comes in a multitude of materials, making the installation process unique to each home. Learn more about what will work for your basement with this guide.

Insulating a Basement Ceiling

Wires and pipes that line a basement ceiling can make installing insulation difficult. Take these precautions to get the job done without disruption.

Choosing Insulation

There are more options for your addition than those rolls of pink fiberglass

Crawl Space Issues and Solutions

Here's how to keep your crawl space in tip-top shape.

Garage Insulation Basics

Adding insulation to a garage is the easiest do-it-yourself job in a renovation or new build.

Blown Insulation in Attics: Installation, Tips and Best Practices

When installed properly, loose-fill insulation improves the energy efficiency of a home, lowers utility bills and decreases carbon dioxide emissions.

Basement Renovation Transforms a Cold Space Into a Warm Family Room

See the before and after photos from another amazing Candice Olson basement makeover, and get tips on how to turn your home's lowest level into a welcoming place to gather.

Basement Windows and Doors: What You Should Know

The right windows and doors can make all the difference in moisture and temperature control within a basement.

Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.