Creating a garden shouldn't make you feel like you're on a slippery slope. Retaining
walls, landscape terracing, or rock outcroppings are a great way to create a more
useful, beautiful, and safer garden in Northwest Washington.
The Purpose of Retaining Walls
Retaining walls are built for slope management, drainage control, and aesthetic
purposes. Retaining wall installation in Seattle is common, due to our terrain.
There are three types of materials used by Environmental Construction -- natural
stone, timbers or wood, and segmental units or block walls.
Natural Stone Walls (outcroppings and dry stack walls)
Natural stone is typically used for low-rise retaining walls and across slopes to
provide pockets for plantings. The use of stone in the landscape can create a variety
of appearances from "New England Dry Stack" to "Alpine wilderness-looks." Stone
effectively holds soil preventing erosion.
Timber Retaining Walls
Timbers can be used for low to mid-rise retaining walls. It is the easiest of the
retaining wall materials to work with. Wood retaining walls complement both contemporary
and rustic looks. A timber retaining wall more than likely will require drainage
to prevent the buildup of hydrostatic pressure.
Block Retaining Walls (segmental units)
Block walls use various interlocking systems for increased stability for low to
high-rise retaining walls. It is the strongest wall material and most likely will
last the longest. Cement block walls offers a clean "industrial" look that could
add a modern feel to the garden.
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