Portland-based Terra Bona Materials launched Terralite Cement at Greenbuild this year hoping to deliver a product that meets the energy-efficiency demands of the greater building science community. Terralite is a “lightweight” product made with cement and an aggregate that includes expanded polystyrene. Marketing materials claim the product is 20% of the weight of traditional concrete and, according to company president Terry Cotton, insulative with an R-value of 1.8 per inch.
Here’s an update to an old article about a tree-shaped charger powered by solar energy. Vivien Muller’s Electree+ is on Kickstarter seeking to raise $200,000 to mass-produce these little home/office gadgets here in the USA. The new prototype will be made with an 14,000 mAh internal battery, 27 amorphous silicon solar cells (each about 3.7 inches), and an easy-to-assemble tree structure that can be customized. In case you’re interested, the early bird gets in at the ground level for ~$199.00.
This is another installment in our series called Energy-Efficient Windows 101 made possible by Marvin Windows and Doors. In our first article of the series, I discussed some window basics and how to read a home window label. Now I want to discuss more product options available for your energy-efficient windows. When you buy Marvin windows, you’ll have the opportunity to decide how many panes you need and which glazing and gas options can contribute towards your home performance goals and well as maximize your comfort.