1.  Building Walls  Wood Framed Walls  Precast Concrete Walls  Steel Framed Walls  Sustainable Walls

2. Walls are typically constructed from wood, pre-cast concrete, and steel.

3. Wood walls are strong, inexpensive, and easy to build. Walls can be fabricated on site or pre- assembled and delivered to the building site.

4. Wall cavities are filled with insulation after wiring and plumping is installed.

5. Precast walls can be fabricated as many shapes and forms. Reinforcement bars and wire mesh are used to hold the concrete in place.

6. Metal studs Are becoming more common in residential construction. Precut holes are provided for electrical and plumbing lines.

7. Manufacturers who create construction materials and components use ENERGY STAR and LEED criteria during the production process of their products. This practice ensures that builders will select products that will create a sustainable structure. www.usgbc.org