Retrofit or Full Frame Window Replacement

On a stucco wall with sound framing, a retrofit window is usually the shorter job, and the running record new windows san bernardino comedy club williamsburg holds shows the same split on houses around San Bernardino, CA, where the choice comes down to what sits behind the old frame. A retrofit leaves the frame in the wall. A full frame job takes everything out. Neither is correct for every opening, and the wall decides which one fits.

How a retrofit goes in

The installer removes the old sashes and any stops, then sets a new window inside the existing frame. The old frame becomes the base the new unit is shimmed, leveled and fastened to. Most interior trim stays in place, and the exterior stucco is left alone. A common choice is a vinyl window in a double hung layout, sized a fraction under the measured opening so it can be plumbed and squared before fastening.

Flush fin units and the stucco edge

A flush fin retrofit window has an exterior flange that overlaps the existing stucco. That flange is sealed to the wall with sealant, so the seal depends on clean, sound stucco around the perimeter. Cracked or crumbling stucco at the edge needs repair before the fin goes on. Sealing over a failed surface only hides the problem for a season.

What full frame removal opens up

A full frame install removes the entire old window down to the rough opening in the wall framing. That exposes the sill, the jambs and the header. Hidden water damage can be found and repaired, and the flashing around the opening can be replaced. The cost is wall repair. Stucco has to be cut back and patched, and interior trim usually comes off, so the job takes more days and more trades.

Glass area and the frame inside a frame

Because the new frame sits inside the old one, a retrofit window usually has slightly less glass area. On a large slider or a picture window the loss is hard to see. On a small casement or awning the narrower sightline can be noticed. Insulated glass in a double pane unit performs the same in either method, so the difference is daylight and frame width, not the glass package.

Foam in the gap

The gap between the window and the opening is filled with low expansion foam. High expansion foam pushes with real force as it cures, and it can bow the frame and bind the sashes. A window that was square at install can stick a week later. Houses in Redlands, Loma Linda and Muscoy show the same failure when the wrong can was used, and a sash that drags on one corner is the first sign.

Deciding at the opening

Probing the sill with a screwdriver tells most of the story. Firm wood and dry framing point toward a retrofit. Soft wood, stains below the sill or daylight showing through the wall point toward full frame removal. Retrofit windows do not always leak, and full frame replacement is not always required. The inspection of the existing opening decides it, one window at a time.