Once the demolition is completed, it is time to build the load-bearing foundation of your artificial turf. We prefer to use Class II Road Base, which is an unbound mixture of 3/4′′ minus crushed rock and fines. Class II road base is the sub-base CalTrans installs underneath roads and highways.
Some companies prefer to use decomposed granite as the subbase layer because it provides a smoother finish and is easier to manipulate, but don’t let that base fool you! We have found that because decomposed granite lacks larger aggregates, it can become soft when it gets over-saturated. For this reason, we prefer using the Class II road base whenever possible.
Proper base preparation includes compacting the entire area with a plate compactor and/or hand tamp, often followed up by wetting the entire surface. This ensures all your base settles and your lawn remains level.
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