Portland refines approach to eco-roof goal
POSTED: Tuesday, April 20, 2010 at 03:47 PM PT
BY: Justin Carinci
Daily Journal of Commerce
Tags: Amy Chomowicz, eco-roof, Grey to Green Initiative
Planting greenery on 43 barren acres in Portland by 2013 may not sound like such an ambitious goal - except that the acres are on rooftops.
Portland officials have a long way to go toward that goal. Since the city’s Grey to Green storm-water management program started in 2008, 66 projects have resulted in 4.7 acres of new eco-roofs, said Amy Chomowicz, eco-roof program administrator for the Bureau of Environmental Services.
Despite a $5-per-square-foot incentive the bureau offers building owners, reaching the 43-acre goal remains a challenge. But Chomowicz had an idea that is now being implemented.
Instead of paying the incentive directly to building owners, the city will hire a contracting team to find buildings suitable for eco-roofs, convince the building owners to allow them, and then design and build the roof systems. For $150,000, the contract will guarantee 30,000 square feet of eco-roofs.
That still amounts to $5 per square foot. An additional $10,000 will go toward developing and marketing the program, for a total contract of $160,000.
Proposals are due to the city by May 28.
“How the contractor chooses to use the $5 per square foot is up to them,” Chomowicz said. “We’d expect that they could go to the building owner and talk to them about doing an eco-roof and say, ‘the cost is $15 per square foot and we get $5 from the city; we’ll charge you $10 per square foot.’ ”
Projects under the contract need to be ones for which an eco-roof wasn’t already planned, Chomowicz said. For those, building owners will still be able to claim the existing credit, which is paid out twice per year.
Even with incentives, eco-roofs remain a tough sell, building owners say. Jeffrey Weitz, president of North Rim Partners, said he’s looked into eco-roofs for several projects, but they never made sense.
Existing buildings may also require reinforcement to withstand the weight of an eco-roof, Weitz said. “Once that’s done, you have to put in a brand new roofing system.
“You tear off the roof, put on a membrane system and put panels in to support it,” he said. Other costs include cleanup of debris, and replacement and tending of plants over the roof’s life.
Especially in a weak economy, owners need to weigh the benefit of adding eco-roofs against the cost, said Susan Steward, executive director of the Portland Metropolitan Building Owners and Managers Association.
Unless it’s already time to replace a roof, few building owners will consider converting to an eco-roof, Steward. “Why would any owner go through that expense and heartburn so they can disconnect from the sewer line and get a storm-water discount?” she said.
“There has to be a decent return on investment,” Steward said. “It was five years, but now it has to be two years, because of the market right now.”
Building owners want to be responsible environmental stewards, Steward said, but they gravitate toward the projects that pay off quicker. She pointed out one owner who installed water-efficient toilets, a step that paid for itself in six months.
“He got his money back and he’s saving a lot of money every month,” she said. “That’s the kind of thing people are going to go for.”
Environmental consultants say there is a market for eco-roofs, even in the current economy. Dan Manning, partner in Ecoroofs Everywhere, already does some consulting like the type envisioned in the city contract.
“I look on a map and say, ‘Wow! There’s an old building that needs a new roof,’ and talk to the owners and suggest they do an eco-roof and use the eco-roof grant as a helping tool,” Manning said.
Manning and partner Greg Haines are putting together a team to submit a proposal for the city contract. They’ve already installed 54 eco-roofs.
“It’s a step in the right direction,” Manning said of the new contract. “We’d love the opportunity.”
But it’s merely a preliminary step, Manning said. “It’s not big enough. $160,000 of eco-roofs doesn’t nearly cover what they want to cover.”
Indeed, 30,000 square feet of eco-roofs would draw the city less than an acre closer to its goal. But that’s not the entire picture, Chomowicz said. She hopes the contract will help develop subcontractors’ and consultants’ skills, so they can carry the expertise to other projects.
Macdonald Environmental Planning already has large-scale eco-roof experience, said owner Laurel Macdonald Bonnell. The company plans to submit a proposal as part of a team.
The new contract could be enough to spur people on the eco-roof fence to action, Bonnell said. “We do have building owners that may be interested in putting eco-roofs on buildings but never figured out how, so this might lend the opportunity for private building owners to green their buildings.”
http://djcoregon.com/news/2010/04/20...eco-roof-goal/