Tips for Installing Energy-Efficient Windows

Investing in energy-efficient windows can contribute to a healthier environment and significantly impact your utility bills. To ensure you make an informed decision about window replacement, consider the following information.

Federal and state criteria
Always prioritize windows that meet both federal and state energy efficiency standards. Look for the Energy Star certification at the federal level and adhere to California-specific guidelines like Title 24. When it comes to frames, go with materials like fiberglass, vinyl or wood for optimal energy performance.

Energy-efficient glass packages
Select windows that have low-E film on the exterior (which helps reflect sunlight) and argon gas between the panes (which improves insulation).

New construction vs. retrofit
New construction windows are ideal if you have existing leaks, as they allow for new flashings to prevent future issues. As such, they’re the best option if you’re planning on living in your home for the long term. Retrofit windows are more cost-effective because they keep the existing aluminum frames intact. They’re best for rental properties or situations where leaks aren’t an issue.