Every three years the California Energy Commission updates the state’s building code to make improvements to the energy performance of new buildings. Starting January 1, 2020, California’s 2019 Building Energy Efficiency Standards will take effect. Any building permitted after the new year will need to comply with these new standards. Continue reading
A cool roof is one that has been designed to reflect more sunlight and absorb less heat than a standard roof. Cool roofs can be made of a highly reflective type of paint, a sheet covering, or highly reflective tiles or shingles. Just as wearing light-colored clothing can help keep you cool on a sunny day, cool roofs material that is designed to reflect more sunlight and absorb less heat than a standard roof. Cool roofs can be made of a highly reflective type of paint, a sheet covering, or highly reflective tiles or shingles. Standard or dark roofs can reach temperatures of 150°F or more in the summer sun. A cool roof under the same conditions could stay more than 50°F cooler and save energy and money by using less air conditioning. Continue reading
As with every window replacement project, the better informed you are about the window materials, accompanying products and services you will need, the more closely the project’s outcome will meet your expectations. Because of constantly changing replacement window technologies, it’s important to let go of your preconceived notions about the best window materials to use. What was once considered standard “go-to” materials for window manufacturers in the past, may no longer even meet today’s stringent energy certification requirements. Continue reading
On May 9, 2018, the California Energy Commission adopted the 2019 Title 24, Part 6 Energy Code updates that will take effect January 1, 2020. Key changes for new residential and non-residential projects include mandatory residential PV, new requirements for HERS testing, and updates to non-residential standards. Continue reading
As you may have heard, California recently became the first state to mandate solar PV systems on all new homes. This is a momentous decision for the industry; it brings the benefits of solar, a historically niche product, directly to a significant portion of homeowners. The policy will dramatically expand the size of California’s solar market–already the most mature in the nation–and perhaps it will eventually inspire similar action in other states. Continue reading
Building and designing affordable zero energy homes involves 12 integrated steps that utilize commonly available building materials and equipment along with easy-to-learn building strategies. By following these steps, you can build a new home that is cost comparable to a conventional home. Continue reading
When you are insulating two-by-four (2×4) and two-by-six (2×6) framed exterior walls and want to use fiberglass insulation, what thickness should you use?
This is a critical question. Adding too little insulation means a colder house. Adding too much insulation means insulation that isn’t properly doing its job, thus a colder house. Continue reading