Window Replacement in San Anselmo, CA

Two reasons, one re-side

On hillside homes we integrate openings into the non-combustible assembly and close ember paths; on creekside homes we flash openings into the drying plane with flood-aware detailing and preserve historic proportions. Doing windows with the re-side makes each possible.

Comfort in a cool valley climate

Gains are comfort and moisture control more than big energy savings in the cool shaded valley; the largest come when flashing and air-sealing are corrected during the re-side.

Antiques-district facades and the windows that frame them

Walk the downtown along San Anselmo Avenue and the housing stock shifts fast: older town homes near the antiques shops sit shoulder to shoulder, many with original double-hung wood sashes that have weathered decades of Ross Valley damp. Replacing windows on these heritage facades is not a drop-in swap. The rough openings are rarely square, sill heights vary house to house, and the street-facing elevation reads as part of the town's character, so we hold the original sash proportions, muntin patterns, and reveal depths rather than defaulting to stock builder units. On the tight downtown lots, staging matters too: there is limited side-yard room to set scaffold or stack new units, so we sequence delivery to the opening schedule instead of dropping a full pallet. Where a unit faces the sidewalk, we plan the tear-out and dry-in for a single day so the opening is never left exposed overnight. The goal is glass that performs against valley moisture while the front of the house still looks like it belongs on that block.

WUI ratings for the windows on the wooded ridges

The hillside neighborhoods climbing both sides of the valley put many San Anselmo homes squarely in a wildland-urban interface, and the glazing is one of the weakest points in an ember storm. Radiant heat and direct flame contact can crack ordinary single-pane glass, and once a window fails the fire has an open path into the framing. For these ridge parcels we spec dual-pane assemblies with at least one tempered lite, frames rated for the exposure, and screening that resists ember intrusion at vents and weep paths near the openings. We also pay attention to what sits below the sill: combustible trim, planter boxes, and stacked firewood under a window undo the upgrade, so we flag those during the window scope. Because moisture is the other constant here, the same opening has to drain and dry, which means the fire detailing and the flashing have to be coordinated rather than fighting each other. Done together, the window earns its place in a hardened wall instead of being the gap that lets a hillside fire find a way in.

Window Replacement for San Anselmo homes

The full window replacement approach — materials, weather-resistive detailing, and the manufacturer standards we install to — is covered on the main service page, then specified for San Anselmo's conditions on this one.

Full Window Replacement details →

Our San Anselmo process