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Green Building

What is Sustainable Building?

A listing of the top 10 sustainable building methods.

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A rooftop garden
A rooftop garden. PHOTO | COURTESY

Sustainable building is the use of environmentally friendly construction techniques to create ‘green buildings’ with limited adverse effects on the environment.

This mode of construction is aimed at reducing the industry’s impact on the environment by applying sustainable development and capitalizing on green building technology.

Here are the top 10 sustainable building techniques.

1. IoT Building Automation Systems

The Internet of Things (IoT) is a giant network of connected objects, which are embedded with sensors that connect and share data with other devices and systems over the Internet.

Builders can integrate IoT with automated systems to operate structures more sustainably. Sensors in buildings can, for example, adjust the required lighting based on weather.

IoT devices such as motion detectors can also be used to switch on the lights when somebody enters a room, and to switch off when the individual exits.

This technique helps to reduce a building’s energy consumption while relieving the facility manager of the duty of manually adjusting multiple gadgets in the building.

2. Prefabricated Building

Instead of building houses from scratch, builders are increasingly buying ready-made buildings from prefab factories and shipping them to the site for assembly.

Manufacturing building materials in a controlled environment minimizes wastage of material, which cuts the industry’s carbon footprint while shortening construction timelines.

Besides, unlike the case of traditional construction where waste is taken to a landfill, additional materials produced in a prefabricated factory are recycled for use in other projects.

3. Greywater Systems

Greywater plumbing systems can be used to reduce a building’s water bills.

It works by amassing and processing household wastewater – except that from toilet streams – for reuse.

Reprocessed water is mainly used for watering gardens and supplying toilets with water.

4. Electrochromic Glass

Electrochromic glass is capable of turning opaque on external stimuli such as UV rays.

This eliminated the need for acquiring shades while helping a building to adapt to the prevailing weather conditions.

5. Green Roofs

Green roofing materials – complete with plants, grass, flowers, and other greenery – are increasingly being adopted in both commercial and residential buildings.

RELATED: How to Build More Sustainable Cities

Green roofs can lower heating and cooling costs while improving the air quality by absorbing carbon dioxide and discharging oxygen.

Besides, stormwater is absorbed in the soil more easily than in the case of a non-green roof.

6. Synthetic Roof Underlayment

Synthetic roof underlayment – which is often asphalt-based – helps to keep moisture out of a building’s interior while holding up to the wear and tear of an exterior setting.

Synthetic roof underlayment also eliminates VOCs from the underlay.

7. Solar Thermal Cladding

Sustainable building materials such as solar thermal cladding products can lower the electricity consumption of a building by doing away with the need for mechanical air-conditioning.

These products are designed to save energy bills by holding heat during winter and passing it through the building for heat retention purposes during the cold season.

8. Passive Solar Design

Passive solar design involves the creation of buildings with windows, walls, and floors that can collect, store, reflect, and distribute solar energy depending on the season.

Solar passive homes store and distribute solar heat during winter while rejecting the same in the summer. This is a great way to cut a building’s energy-related carbon footprint.

9. Self-healing Concrete

Still in its early stages of development, self-healing concrete is a form of concrete that is made using sand, gel, and bacteria that enables it to heal itself whenever a crack develops.

This form of concrete can deliver a low-carbon infrastructure by eliminating inspection, repair, and replacement while helping investors build at much lower whole-life costs.

Jayson Maina is a technology reporter with a degree in Computer Science from JKUAT. He has covered emerging technologies and their impact on the construction industry for more than a decade.