Masonry Magazine January 2009 Page. 29
Johnston says the Pine Hall brick paver combined management of stormwater with the classic beauty that genuine clay provides, which is important from both an environmental and a design aspect.
Ed Marshall, director of special projects for Furman University and project director for the Cliffs Cottage project, agrees.
"The Pine Hall Brick permeable clay pavers were a perfect addition to this project," says Marshall. "It is really a marriage of design and function."
StormPave and a similar product, RainPave, are the first of their kind. The two resemble other clay brick pavers in Pine Hall Brick's product line. But, unlike the others, these pavers have a larger space between them a higher void area - that allows water to infiltrate through the pavement surface.
Underneath the pavers, instead of a conventional installation that includes a bed of crushed stone and sand, with sand swept into the joints on top, there is a series of "open graded" aggregates-gravel without fine particles used as a base.
The largest stones are placed on the ground, layered with progressively smaller stones. The pavers are carefully placed, and the smallest stones are swept into the joints between the pavers. The series of open aggregates allows rainwater to flow as good bacteria builds around the rocks over time and aids in reducing some pollutants.
SAVING WATER
Johnston, the architect at Cliffs Cottage says builders often think of stormwater as a liability to be avoided, perhaps as a potential flood or a lawsuit from the owner of a piece of property nearby. He says stormwater management has become part of the designer's mindset at the planning stages of a project, as they incorporate gray water usage and groundwater pollution prevention into early site planning.
"Sustainable design is thinking of rainwater as a resource," says Johnston. "When you start thinking that way, it really affects the selection of a lot of things but, particularly, paving products."
Johnston says well-designed, permeable pavement systems provide sufficient surface water infiltration and water storage, and products like Pine Hall Brick pavers provide designers with a method to capture peak runoff pollutants from storm water, reducing "first flush" pollutants from entering lakes, streams and storm drains. IMAS
Pine Hall Brick earth friendly naturally green
Wide range of paver colors and styles
• Exceeds all ASTM C902 requirements
Extremely durable strong and colorfast
Size consistent and versatile often reversible
GENUINE
Clay pavers can contribute to design strategies for LEED certification
Sustainable product with low environmental impact from manufacturing
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January 2009
Masonry 27