Drapery for San Francisco Bay Windows: A Trade Guide
Start With the Hardware, Not the Fabric
For a San Francisco bay, the drapery decision is really a hardware decision. A three-sided or curved bay can be dressed one of two ways: a continuous bent rod or track that follows the bay so panels traverse the full run, or individual panels mounted per facet so each window reads as its own composition. The continuous approach gives you one sweeping gesture and full blackout or privacy coverage; the per-facet approach preserves the architecture and keeps stacked fabric off the glass in rooms where every inch of Pacific light matters.
If the client wants the drapery to actually close, confirm early whether the bay angles allow a traversing carrier to pass the corners cleanly. Bent steel track, custom-mitered rods, and French returns each behave differently at the junctions, and the wrong choice shows up as panels that snag or gap exactly where the eye goes. This is a conversation to have with your workroom before fabric is ordered, because the hardware plan determines fullness, stack width, and yardage.
What Edwardian and Victorian Flats Demand
San Francisco's Edwardian and Victorian housing stock rewards drapery that respects the original millwork. Tall sash windows, deep casings, picture rails, and crown details all constrain where a rod or track can live. Mounting above the casing and below the picture rail is often the cleanest line; mounting at the crown elongates the window but requires the workroom to account for the full drop and for walls that are rarely plumb after a century of settling.
Expect the openings to be out of square. Floors slope, sills tilt, and the two outer facets of a bay are almost never mirror images of each other. A good workroom measures each facet and each return independently rather than assuming symmetry, and cuts panels to the actual conditions so hems sit level to the eye even when the floor is not. Plaster walls and old lath also change the anchoring plan, so flag the wall construction on your site notes.
Fabric, Fullness, and Light in a Bay
Bays collect light from multiple exposures at once, which is wonderful for a room and punishing for fabric. Specify lining appropriate to the exposure, and consider interlining where you want the panels to hang with weight and protect the face fabric. In fog-belt neighborhoods, a sheer layer on the bay with dressier side panels at the outer edges is a classic solution that keeps the view while softening the glass.
Where the client needs real light control in a bay, pairing drapery with custom shades mounted inside each facet is often more successful than asking one set of panels to do everything. The shades handle function at the glass; the drapery handles the architecture. We detail this combination constantly for custom drapery projects in San Francisco, and it is especially forgiving in bays where traversing hardware is awkward.
How Valley Handles Bay Area Projects
A note on logistics, since designers ask: Valley's San Francisco location is an office that meets by appointment, not a workroom. Bay Area projects are measured locally by our team, fabricated in our Los Angeles workroom, and installed back in the Bay Area by installers who know these buildings. You get workroom-level fabrication with local eyes on the actual conditions, which is exactly what a settled Victorian bay requires.
When you bring us a bay window project, send elevations or photos of the full bay including the ceiling line and any picture rail, and tell us whether the panels need to traverse. From there we will walk the hardware options, confirm yardage against the chosen fullness and repeat, and schedule the site measure. The earlier we see the bay, the more options you have.
Related reading: Bracket Projection: Clearing Radiators, Trim, Romans · Drapery Fullness Explained: Why We Cut at 2.5x