Establishing the Baselines for apron
Photo: Russell Kaye
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Establishing the Baselines

An apron needs a 10- or 12-inch base of well-packed gravel to support the stone and the weight of any car passing over it, and to drain away water that could cause frost heaves. In this case the asphalt already had such a base, saving Roger days of excavation and tamping. To guide the stone layout and establish its finished grade, he anchored a bright orange mason's line down the center of the apron. This line remained in place for the entire project.
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