As sustainability takes center stage, construction firms and owners are realizing the benefits that accompany the integration of green construction techniques and materials. This article shares green construction tips and strategies that include harnessing the natural resources of a property, designing and building to maximize efficiency and minimize cost, and staying focused on sustainable return on investment (SROI).
HARNESS NATURAL RESOURCES
In a way, green construction is partly an exercise in holistic thinking. Planners should step back to consider:
- What is the building’s role? Who will occupy it and what will they be doing?
- Where will it be located? What characteristics of the property and its environment can be leveraged to make the building more sustainable?
- What impact will the building have on its environment once built? How can any ill impacts be reversed into green advantages?
Keeping in mind that owners ultimately need to meet business goals, it’s still worth the added effort and expense to incorporate as many green construction principles as possible.
THE BEST LIGHT IS FREE
Electric lights are getting more efficient, but they still account for between 25 to 45 percent of a building’s energy use. Granted, even if you’re going green you still need lights. But with some thoughtful design, you won’t have to turn them on as much.
The sun is the best light source for pretty much every setting, whether it’s professional, educational, recreational, or otherwise. It’s also free. That’s why green buildings are designed to collect as much natural light as possible. Let’s use a large office as an example. Green construction principles turn traditional office design on its head. Large, open areas where employees work in groups are placed adjacent to south-facing walls. That’s the best spot (in the Northern Hemisphere, at least) for the most people to get the most usable light.
Another green construction principle to consider is the types of lights to install. Opting for high-efficiency LED lights will reduce the need to replace lamps. And, equipping spaces with motion sensors that only turn on the lights when someone is nearby dramatically reduces electrical costs. This has become a hallmark of industrial, manufacturing, and warehouse construction.
In addition to cost savings and environmental benefits, natural light also makes people happier. That’s a key metric to consider when calculating a building’s sustainable return on investment.
SAVING AND RECLAIMING WATER
Addressing water use and reuse is tricky. Across the commercial, residential, and industrial spectrum, water quality is heavily regulated. For almost any application, the water used must be potable. Plus, it’s usually so cheap that owners will pass on water conservation expenditures because they don’t believe they’ll pay off.
But cost savings and environmental benefits can be achieved by applying green construction principles to water use anyway. The easiest strategy to implement is installing high-efficiency fixtures, which obviously reduces water costs. In addition, if owners can demonstrate that their building will use less water over the lifespan of the building, they can save money before construction is even finished in the form of reduced sewer tap-in costs.
Reusing water is also possible. In some jurisdictions, on-site water recycling is permitted. The “grey water” that results can be used for landscape irrigation or water features and in some locations for toilet flushing. Some buildings also incorporate rainwater catchment systems for these reasons, and the benefits are many. For one thing, diverting rainwater further relieves pressure on utilities. For another, it’s free. Finally, protecting the most limited natural resource we have scores social points that play a major role in calculating sustainable return on investment.
Thoughtful choice of construction materials creates another opportunity to realize cost savings and environmental benefits.
A good example is the debate over whether pre-cast concrete panel walls are preferable to metal framed structures using steel studs. Some key considerations when making such a decision are:
- Buildings using pre-cast concrete panels require less insulation according to energy codes because they’re thermally superior to metal building materials.
- Pre-cast concrete panels are known as “mass walls” that feature greater thermal mass and thermal lag properties. That means they absorb more heat and better regulate interior temperatures, lowering energy costs.
- Walls with higher thermal mass help keep buildings warmer in winter and cooler in summer compared to metal buildings that have virtually no thermal mass.
Mass walls can be designed with varying thermal mass and thermal lag characteristics so owners can develop HVAC systems and mass wall schemes that complement one another, maximizing occupant comfort and trimming heating and cooling costs.
RETURN ON INVESTMENT
Sustainable return on investment (SROI, also known as social return on investment) combines the familiar hard numbers used to determine classic ROI —like income and expenses—with “softer” data points like environmental impact and social good.
SROI is admittedly hard to calculate because it partly involves quantifying what some believe is unquantifiable. For instance, SROI involves asking these questions:
- How do you quantify better health?
- How much is improved employee or student morale worth?
- Can you put a price on the social goodwill generated when you slash your carbon footprint?
But grappling with these mysteries often ends up being worth the effort. In an age when owners are more cost-conscious than ever (and when governments are all-in on sustainability), those who can demonstrate high SROI stand to earn very real—and very lucrative—tax rebates and incentives.
There are many strategies and techniques owners can apply to boost the sustainability of their building, whether they’re planning new construction or renovation. That’s why a partnership with an experienced green construction firm can do a world of good.
When owners and construction team members collaborate, a customized green construction roadmap will emerge that suits owners’ business goals while also boosting sustainability. The potential benefits— both social and economic—are too good to pass up.
About the author:
Brandon Burd is the director of sustainable design at The Korte Company. With more than 11 years of experience in architectural design, Brandon is part of the company’s design team and is responsible for assisting in building and site design, code analysis, consultant coordination, and specification writing. For more information, visit www.korteco.com.
Modern Contractor Solutions, November 2018
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