Windows in Los Angeles have to handle glare, west sun, and a housing stock that still includes a lot of single-pane glass. Craftsman and Spanish bungalows often keep wood sash or old steel casements that look right and leak air once the sun drops. Ranch houses and stucco flats are full of aluminum sliders whose frames get hot to the touch and whose weep holes clog with paint and dust. Inland rooms overheat after lunch. Closer to the water the same opening may feel drafty at night rather than unbearable at noon. The glass has to answer the side of the basin you actually live on.
The opening is part of the problem. Stucco hides the edges, and a failed flashing or a cracked corner joint lets water stain the plaster below a window that otherwise looks fine. Wood sash in bungalows sticks, sheds glaze, and leaves a gap at the meeting rail. Sliders jump the track, lose their latch, or fog between panes when the seal dies. West-facing glass without a porch or a deep eave is an oven in the valley and in the eastern parts of the city. North-facing glass under a tree may never be the complaint. Do the worst rooms, not every opening, unless the frames themselves are done.
Comfort and water are both reasons to call. A sill that swells, a bubbled wall under a window, or a curtain that fades and a room you avoid after two in the afternoon are all window problems with different fixes. Noise from a busy street is real in the flatter neighborhoods, and it is a different goal than cutting heat gain in a quiet inland cul-de-sac. Say which of those you are actually trying to solve.
Count the bad openings and name their walls. Note wood, steel, aluminum, or a newer frame, and whether you see fog inside the glass. Note stucco cracks at the corners and any stain under the sill. Say whether the house bakes inland or cools off near the marine layer. That is enough to talk about repair, a single opening, or a plan for the rooms that fail first.
Call the number on this page.