Why This Matters
West-facing windows receive the lowest sun angle in the afternoon — the same angle that drives the highest solar intensity per square foot of glass. This is why west-facing rooms overheat first.
Near Chabot Space & Science Center in Berkeley, south- and west-facing windows receive the most direct solar load and benefit most from film. This is especially problematic for multi-family residence installations, which condos and apartment buildings benefit from film to reduce hvac load and improve tenant comfort.
Inland California cities experience some of the highest solar irradiance in the country. Combined with older single-pane window stock, this creates strong demand for low-e retrofit and solar control films.
The Solution
Quality window films carry 10–15 year manufacturer warranties. That's longer than most window treatments and comparable to the lifespan of the windows themselves.
Anti-reflective film is the most targeted solution for glare: it reduces peak window luminance without significantly cutting total light transmission. Best for rooms where screen visibility is the primary concern.
Retrofits existing glass with a low-emissivity coating for improved thermal performance.
Climate & Solar Performance
Properties near Chabot Space & Science Center in Center For Independent Living, Berkeley experience south & west exposure conditions that make window film particularly effective. Low-E Retrofit Window Film is specifically engineered to address this solar exposure.
Effective against south & west exposure
Rated for multi-family residence protection
Professional installers available in Berkeley
10–15 year manufacturer warranty
Installation Guide
Professional installation typically takes 2–4 hours for a standard residential job. The installer will clean the glass, apply the film with a slip solution, squeegee out all air pockets, and trim to a precise fit.
Install time
30–45 min
Per window
$150–$400
Cure time
30 days