Find out how a wooden retaining wall compares to block or concrete. In most cases, it's the simple construction and low costs that make timber retaining walls the most common choice for do-it-yourself home improvement. This vulnerability shortens the lifespan of wood walls compared to block or concrete walls.

A proper preservative treatment is usually more reliable when using wood in soil or water contact than naturally durable species and normally at less cost. Untreated lumber of .. for its intended life span. But if a retaining wall or fence post is intended to last as long as possible, pressure treatment is highly recommended.

wood. Typical uses include structures in direct contact with the ground or water. (decks, retaining walls, raised-bed gardens, piers for boat docks) and other applica- tions where . where resistance to decay fungi is evaluated in a laboratory. Resistant or An all-heartwood grade of redwood would cost almost four times as

Landscape designers typically prefer limestone because it naturally blends with the yard to complement the home--especially an older one. But many homeowners are opting for segmental concrete block retaining walls because they cost less and their appearance has improved. "You can get them tumbled

Walls and Buried Structures. 8.1. Retaining Walls. 8.1.1. General. A retaining wall is a structure built to provide lateral support for a mass of earth or other material Design PE Office with the Bridge and Structures Office, and the Materials Laboratory. Geotechnical .. 2 or better. Hem-fir wood species, due.