Читать книгу Landscaping For Dummies - Lance Walheim - Страница 98

Installing one or more retaining walls on a slope does two good things for a landscape:

 It prevents erosion.

 It creates flat plantable areas where there wasn’t before.

You can build a low (3 feet, .9 m, or less) retaining wall yourself out of timbers, stacked stone, or stacked block using the techniques in these sections.

A wall higher than 3 or 4 feet (.9 or 1.2 m) is more of an engineering feat than a low one (it has to be able to withstand the considerable pressure from the earth behind it). It generally requires permits. Have a professional — a landscape architect or a stonemason, depending the material — design and build it.