Window Replacement in Castro Valley, CA | Hamilton Exteriors

Air leakage: We measure draft points around existing window frames and identify where insulation is missing.
Condensation patterns: Fogged glass between panes indicates seal failure. We document every failed unit.
Structural condition: We check for rot in the window framing, sill, and surrounding wall structure. Castro Valley homes built before 1960 often need minor framing repairs before new windows go in.
Energy performance: We calculate the U-factor and Solar Heat Gain Coefficient (SHGC) of your current windows and recommend replacements that exceed Title 24 requirements.

Castro Valley window replacement contractor. Architect-led design-build. Milgard, Andersen, Marvin. Free on-site estimate. CSLB #1078806.