Exterior Walls

Host Jeff Wilson explains that exterior walls comprise what is known as the building envelope, which defines the exterior structure of your home.
exterior walls define structure of home

exterior walls define structure of home

Building Envelope

Exterior walls are responsible for keeping the comfortable air in and the elements out. All building codes require that you insulate the exterior walls of your home. This is done in-between the wood studs of the frame. Here's a look at some energy-efficiency factors to consider for walls:

  • Fiberglass batts are pre-cut for a tight fit in between wall studs. They're easy to install and are used to reduce heat loss of air leakage.
  • Sheathing is an added protective layer on the outside of the exterior wall. It's essentially plywood that is nailed or screwed into the studs of the building. Sheathing provides structural integrity, and its other function is to close off the studs.
    Note: Sometimes sheathing can be foam insulation and sometimes it's rigid board. There's no structural loss using rigid board, and it's basically a better insulator for your home.
  • Air infiltration barriers are polyurethane sheets that protect the house from moisture. The siding of the house is then applied on top of the air infiltration barrier. This can be a good wood paneling, a wire or a stucco surface.
Keep Reading

Next Up

Everything You Need to Know About Walls

Host Jeff Wilson explains how exterior and interior walls are constructed in a new home.

Interior Walls

Host Jeff Wilson explains how interior walls form the rooms and spaces inside the house, and how framers use the blueprint to see where the interior walls will go.

Exterior Paint Selection

Painting the exterior of your house may be a job for professionals, but with some basic knowledge and motivation, doing it yourself could save you a lot of cash.

A Home's Exterior Materials

The outer finish of your house serves double duty, giving it style and acting as protection against wind and rain.

Walls and Refinishing

Useful tips for DIYers on walls and refinishing.

Closing Up the Walls: Hanging Drywall

As Home IQ follows the Obergs' home construction process, the homeowners take a walk through the house to make sure various facets are in the right place. Also, building scientist Glenn Cottrell explains drywalling.

Exterior Painting Preparation

When painting the exterior of a house, learn these valuable tips that can save you time by preparing properly for the project.

Color Your Walls

To make a splash of color on your walls, learn these tips on the qualities of basic color groups.

How to Select Exterior Paint Colors for a Home

Your home’s exterior is the way you greet the world — choose a color wisely with these expert tips.

How to Clean Walls

Get tips for effectively removing dirt, stains and smudges from painted walls without causing streaking or water damage.

On TV

Yard Crashers

7:30am | 6:30c

Yard Crashers

8:30am | 7:30c

Yard Crashers

9:30am | 8:30c

Yard Crashers

10am | 9c

Yard Crashers

10:30am | 9:30c
11am | 10c
11:30am | 10:30c

Pool Kings

12pm | 11c

Pool Kings

12:30pm | 11:30c

Pool Kings

1pm | 12c

Pool Kings

1:30pm | 12:30c

Pool Kings

2pm | 1c

Pool Kings

2:30pm | 1:30c

Pool Kings

3pm | 2c

Pool Kings

3:30pm | 2:30c

Pool Kings

4pm | 3c

Pool Kings

4:30pm | 3:30c

Pool Kings

5pm | 4c

Pool Kings

5:30pm | 4:30c

Pool Kings

6pm | 5c

Pool Kings

6:30pm | 5:30c

Pool Kings

7pm | 6c

Pool Kings

7:30pm | 6:30c
On Tonight
On Tonight

First Time Flippers

8pm | 7c

First Time Flippers

8:30pm | 7:30c

First Time Flippers

9:30pm | 8:30c

First Time Flippers

10:30pm | 9:30c

First Time Flippers

11:30pm | 10:30c

First Time Flippers

12:30am | 11:30c

First Time Flippers

1:30am | 12:30c

First Time Flippers

2:30am | 1:30c

First Time Flippers

3:30am | 2:30c

Elbow Room

4:30am | 3:30c

Get Social With Us

We love to DIY. You love to DIY. Let's get together.

Consult Our A-Z Guide

Everything You Need to Know

Browse a full list of topics found on the site, from accessories to mudrooms to wreaths.  

How-To Advice and Videos

Get video instructions about kitchens, bathrooms, remodeling, flooring, painting and more.

Watch DIY Downloads Now

Watch DIY Network LIVE

Don't miss your favorite shows in real time online.