Bay & Bow Window Replacement in Daly City
Front-room projections across Westlake, Southern Hills and the streets off Callan Boulevard, rebuilt as the small structures they are.
A Bay Window Is a Structure, Not Just Glass
Every bay and bow assembly hangs off the face of the house and carries its own weight, which is why replacing one is a different job from swapping a flat window. There is a head board above, a seat board below, support cables or knee brackets carrying the load, insulation packed into the cavities, and a small roof on top with its own flashing where it meets the wall. In Daly City that roof-to-wall junction is the usual failure point, because sideways rain finds a tired flashing joint long before it finds anything else. Daly City Window Replacement rebuilds the entire assembly: we replace the glazing units, repair or replace the boards and framing, re-support the projection correctly, and redo the roof and flashing detail so the whole thing sheds water the way it did when the house was new.
What Bay & Bow Replacement Covers
The scope below is standard for a projecting-window rebuild, itemized on your written quote.
Load path inspection
We examine how the existing bay is carried — cables into the header, knee brackets below, or a combination — and confirm the support is adequate before specifying the replacement.
Complete unit removal
The full projection comes off, including the center picture unit, the flanking operating units and the boards tying them together.
Head and seat board replacement
New boards are built and insulated, giving you a solid, level seat surface instead of the sagging particleboard many older bays hide.
Cavity insulation
The voids below the seat and above the head are insulated properly, which is the difference between a bay window that feels warm and one that turns the front room cold.
Support cable or bracket installation
Cables are anchored into the header and tensioned, or brackets are set into framing, so the projection does not settle over time.
Roof rebuild and flashing
The bay roof is rebuilt with new decking as needed, underlayment, roofing material to match, and step and counter flashing lapped into the wall assembly.
Glazing unit selection
The fixed center and operating flankers are specified with low-E and argon appropriate to the elevation, and casements or double-hungs on the ends restore ventilation.
Exterior trim and stucco patching
The perimeter is trimmed, sealed and patched into the surrounding wall so the repair does not read as a repair from the curb.
Interior finish
New interior casing, the finished seat surface and apron detail are installed and left ready for paint or stain.
Cleanup and haul-away
The old assembly, glass, boards and roofing debris leave the same day, with floors and landscaping protected throughout.
How the Project Runs
- 01
Structural measure
This measure takes longer than a flat window because we are checking support, board condition, roof flashing and the framing at the header. You will hear exactly what is failing and what is still serviceable. The itemized written quote comes at the end of the same visit.
- 02
Fabrication of the units
The center and flanking units are built to the angles and dimensions of your existing projection, which typically runs four to eight weeks. Bow assemblies with multiple gentle angles sit at the longer end. We confirm the configuration in writing before releasing the order.
- 03
Rebuild and install
A bay or bow rebuild usually occupies a crew for most of a day or a full day on its own. The opening is temporarily protected if the work spans a break, the structure goes back together in sequence from support to boards to glass to roof, and we walk the finished assembly with you inside and out.
Why These Assemblies Need a Specialist Approach
We rebuild the structure, not only the glazing
Replacing the glass in a bay whose seat board is soft and whose roof flashing has failed buys a year or two. We address the support, the boards and the roof as part of the same job so the problem does not return.
Roof-to-wall flashing done properly
That small roof meeting a stucco wall is the most leak-prone detail on the whole house. We rebuild it with correct step and counter flashing lapped into the weather barrier rather than relying on a bead of sealant.
Insulated seat and head cavities
Uninsulated bays are why so many Daly City front rooms feel colder than the rest of the house. Filling those cavities properly is included, and the difference in the room is usually obvious the first cold evening.
- Licensed & insured
- Flat written pricing
- Structural support and roof flashing included in scope
- Written labor warranty
Rebuild the Bay Before the Water Finds the Framing
Sagging seats, staining at the corners and drafts around a projecting window all point to the same set of causes. Book a free measure and we will tell you what is structural, what is cosmetic, and what each part costs in writing.
(650) 278-4593(650) 278-4593 — book your measure