Permeable Paving with Porous Pave is an Essential Hardscape Element
by David Aquilina, Strategic Storyteller
“Research confirms what we know from experience. Spending time outdoors, getting fresh air, and enjoying natural beauty improve health and enhance quality of life.”
Carman was guided by a basic set of design principles for gardens intended for the elderly with dementia:
Safety and Security – First and foremost, minimize potential hazards. Steps and changes in elevation are avoided because of the risk of trips and falls. Surfaces are non-slip and non-reflective. Enclosing the garden with a high fence ensures that no one can wander away from the safety of the garden. No sharp, thorny or poisonous plants are present.
Design for Multiple Activities – “We designed for a variety of activities, including quiet contemplation and prayer, walking, gardening, outdoor classes, socializing, and dining,” said Carman. Outdoor furniture, with seating for individuals and groups, is sited in areas of sun and shade, and the tables feature umbrellas. The raised rolling planters enable the sisters to enjoy gardening while staying seated. Staff can easily roll the planters aside when space is needed for activities such as outdoor chair aerobics.
Engaging Features – Gardens for people with memory loss have elements that draw attention and engage the senses. Carman included two fountains and wind chimes. Plant selection emphasizes color and strong scents (such as fragrant viburnum shrubs and perennials including fragrant angel cornflower and English lavender).
Viewable from Indoors – There are times even on sunny, warm days when some may prefer to stay indoors. When they do not want go outside, the Sisters can still enjoy viewing the garden from the windows of their rooms as well as through the large glass doors that lead out to the garden from the activity room.
Garden Walk – The circular walkway is easy to navigate. It is wide to accommodate wheelchairs, single walkers and those strolling side by side. The walkway and seating areas have a non-slip surface. For the Tranquility Garden, it also had to be permeable.
Local government approval of the project required no impervious surfaces or increase in stormwater runoff. To include a walkway and patio seating areas, Carman had to use a permeable paving material.
He selected Porous Pave XL from Porous Pave, Inc. (Grant, Mich.), a highly porous and durable pour-in-place paving material made from 50 percent recycled rubber chips and 50 percent kiln-dried aggregate mixed on site in a mortar mixer with a liquid binder. In contrast to permeable pavers, the entire surface of the installed product is permeable. With 27 percent void space, it infiltrates more stormwater than permeable pavers. The recycled rubber content makes it slip resistant according to ASTM D-2047 standards and in compliance with ADA requirements.
“This fulfilled our requirements for slip-resistant, permeable pavement. In addition, it is poured in place as one continuous surface without expansion joints, which adds an extra measure of safety,” said Carman. “The texture of the material when cured, and the available color options, enabled us to complement the landscape.”
Brian Geesey, Rock & Block Design (Reading, Penn.) poured two inches of the paving material on a base of compacted ¾-aggregate installed by Eric’s Nursery and Garden Center (Mt. Laurel, N.J.). The project was completed in July 2017.
“We have worked with it on other projects,” said Bryan Geesey, owner, Rock & Block Designs. “It gives you a uniform, level and seamless surface across areas of new installation on an aggregate base.”
How do the Sisters of Mercy assess the results?
“When I see Sisters sitting in the garden and saying their prayers at 6 a.m. as the sun rises, when I see them gathered outside for exercise, when I see a staff member or visitor walking with a Sister along the circular path, I see the garden fulfilling our shared vision,” said Bambach.
Owner: The Sisters of Mercy, Roxann Bambach, Administrator
Landscape Architect: Design for Generations, LLC, Jack Carman, FASLA, RLA
Landscape Contractor: Eric’s Nursery and Garden Center, Christopher Kendzierski, LLA, Landscaping Manager
Pavement Installation Contractor: Rock & Block Design, Brian Geesey
Permeable Pavement: Porous Pave, Inc.
Permeable Pavement Representative: Splash Sales and Marketing, Inc., Jim Daulerio
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