Tag Archives: building energy

Solar Shading Devices: What You Need to Know

When the ambient temperature within a building is within or above the comfort zone, any additional heating of the interior due to solar gain will result in discomfort. Architects therefor design solar shading devices to prevent this. However, at cool times of the year, it is generally desirable to allow solar radiation to pass directly into the room to provide a useful heating effect. This response – between blocking excess gain in summer vs optimizing gain in winter- can be provided either by the shading device being moveable, or by it being geometrically selective. Continue reading

It’s Official: All New California Homes Must Incorporate Solar

Solar panels will be a required feature on new houses in California, after the state’s Building Standards Commission gave final approval to a housing rule that’s the first of its kind in the United States. Set to take effect in 2020, the new standard includes an exemption for houses that are often shaded from the sun. It also includes incentives for people to add a high-capacity battery to their home’s electrical system, to store the sun’s energy. Continue reading

CA’s Updated Building Energy Coming in 2020

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

Cool Roofs

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

Comparing Window Materials: Which Is Best?

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

2019 Energy Code – A Brief Summary of Changes

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

California’s Solar Mandate for New Homes: What You Need to Know

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