Wall and rock garden at 5883 Washington Boulevard one month after construction by the 
Hillsdale Landscape Department 
WALLS 
In the building of walls the footing or base is the factor which largely determines the. 
permanency of the wall. In case of masonry wall, the base must go beyond frost, usually 
three feet. The thickness and reinforcing of it is determined by the height and weight of 
soil behind it, if it is to be a retaining wall. We are very proud of the many dry walls 
we have built, and especially recommend it to you as a practical, and economical, solution 
to the retaining wall problem where troublesome banks occur. When the soil pockets 
in this wall are planted with various rock plants, it makes a very beautiful sight that is 
an asset to any property. By dry wall is meant that instead of using mortar, between the 
rocks, soil is used. In this soil. then, rock plants are set. The base for such a wall need 
only be on solid ground, usually about one foot below the surface, although, here, too. the 
base and thickness of the wall are determined by the amount of soil being retained. It 
must be realized that the strength of a dry wall is only in its weight, which must equal 
or exceed the weight of soil being held in place behind it. This type wall is usually pitched 
back about one to four and the stones in it are tilted back to catch and hold the rains for 
the plants in the wall. 
Buy at Hillsdale 
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