Window Installers in Riverside, CA

Taking out an old window is the one moment when the inside of the wall is open to look at, and a good installer uses it. In Riverside, CA, houses range from early twentieth century bungalows to tract homes built much later, so what turns up behind the trim changes from street to street. The questions below cover what gets checked once the old frame is out, what the findings mean for the new unit, and how the installer decides what to do about them.

What is the first thing checked when the old window comes out?

The bare opening gets a look from the inside and the outside before anything new is brought near it. The installer wants to know whether the framing around the opening is solid, whether it is dry, and whether any of it has been eaten, rotted or cut away by earlier work. A flashlight and a screwdriver do most of the job. The screwdriver goes into the bottom plate of the opening, the studs on each side and the header above, and anything that gives under moderate pressure gets marked.

The opening is then measured again. The measurements taken before the job were taken against trim and an old frame, and the bare studs often give slightly different numbers. A new unit is only ordered after these final readings agree with the order, and a unit that is more than a small fraction off is a reason to stop and call the supplier before the old window is gone for good.

What does rot at the sill look like and how bad is it?

Sill rot is the finding that comes up most often, and it ranges from a damp patch to a missing section of framing. Early rot shows as dark discoloration and a surface that dents under a fingernail. Advanced rot crumbles and leaves a cavity under the old frame that was filled long ago with a paste patch or a stuffing of paper.

Small soft areas on a solid sill can be cut back to good wood, treated and built up with a rot repair compound or a splice of new lumber. Larger damage means the sill plate itself has to be replaced, which can involve opening the interior wall a few inches below the window and sometimes the stucco on the outside as well. The installer should state this before the new window goes in, since pressing a new unit onto a soft sill hides the problem for a season or two and then the unit settles and leaks.

Why does the old flashing matter?

Many older Riverside houses have no flashing at all behind the window frame, only a layer of building paper that was nailed up before the stucco went on. The paper is often torn where the old nailing fin went through it, and in some cases it has dried out and crumbled. That is not a defect in the old window so much as a limit of how the house was built, and it is the part that gets corrected on a replacement.

The fix is to lap new flashing tape over the old paper. The sill gets its pan first, then the jambs, then the head, each layer overlapping the one below in the direction of water flow. Where the old paper is intact and well bonded, it is cut into and lapped under the new head tape so the whole assembly stays shingled. Where it is gone, the tape goes directly on the sheathing and the stucco edge is sealed to it.

How does the installer tell whether the opening is square and plumb?

The opening is checked against a level and by its two diagonals. Older framing is seldom square, because the lumber has dried, the foundation has moved and in some cases the house has been remodeled more than once. The installer does not try to fix the framing. The goal is to set the new frame itself plumb, level and square inside an opening that is not any of those things, using shims on both sides of every fastener so the frame is held by the wall and not pulled out of shape by it.

The gap that results varies from one side to the other, and that is acceptable if the widest part can still be bridged by backer rod and sealant. A gap that is wider than the sealant can handle is closed up with a strip of wood or a trim piece, because a thick bead of sealant that is not backed by anything will crack in the first summer.

What about stucco, paper and the exterior wall around the opening?

The stucco around an opening is checked once the old frame is out, because the cut edge shows how thick the coating is and what is under it. Stucco on a house in Riverside is usually a few coats over wire lath, and the lath is sometimes rusted where water has been getting behind it at the window. If the lath is rusted through, a section is cut out and replaced and the stucco is patched in layers.

The stucco return is planned at this point. When the new unit has a nailing fin, the stucco is cut back to expose the sheathing, the fin is set and flashed, and the return is rebuilt after. When the new unit is a retrofit insert that goes inside the old frame, none of this applies, but the old frame is checked for the same rot and corrosion because the insert will depend on it for the life of the window.

Is there anything inside the wall that changes the plan?

Sometimes. Electrical cable runs close to the sides of some openings, and a long screw driven blind can hit it. Some older houses have cord and pulley weights in the sides of the frame, which are left in or removed depending on the new unit, and the cavities they leave need to be insulated and closed up.

Insulation in the gap between the frame and the studs is a separate point. A fiberglass batt crammed in tightly is not an air seal and is not what the manufacturer calls for. Low expansion foam made for windows, or backer rod and sealant, fills the gap without bowing a vinyl frame. Ordinary expanding foam presses hard on the frame as it cures and has pushed many sashes out of true.

What happens when something serious is found?

The work stops and the findings are written down, with photos taken before anything is covered. A serious finding is one that goes beyond the window itself, such as widespread rot in the wall plate, signs of termites, an opening that was cut oversize with the header undersupported, or a stain pattern that shows a long running roof or plumbing leak above the window. Those are not window problems, and they are not solved by a better window.

The homeowner is shown the finding in person if possible, and the options are laid out: repair now as an extra, repair later and install anyway with the risk named, or hold the job until a carpenter or a termite inspector has looked. The installer who covers the problem with a new frame and says nothing is the reason window replacement has a bad reputation in some neighborhoods.

How do the findings change the choice of frame?

A wall with a rotted sill and no flashing favors a full replacement with a nailing fin, because the opening can be rebuilt properly. A straight, dry frame in good condition can take a retrofit insert. The material of the new unit follows the conditions. Vinyl is common and light and handles most openings. A fiberglass window handles wide openings and dark colors facing the afternoon sun, where vinyl moves more. A clad window with a wood interior suits a house where the casing and the plaster return are to stay.

A low e coating with a low solar heat gain rating belongs on west and south walls, and a double pane unit with argon fill and a warm edge spacer is standard on most new units.

What does the installer record before closing the wall?

A short log is kept for each opening: the final measurements, the condition of the sill and framing, the state of the old paper, any repairs made, and the type of flashing and sealant used. Photos are taken at three stages, the bare opening, the taped opening and the finished interior, and the log is the first thing looked at if a leak ever appears at that window.

The new window is only as good as the opening it goes into. Time spent on that opening before the frame is set is the cheapest part of the job.

The walk-through at the end of a window job is a short inspection, and it is where most small defects get found while they are still cheap to fix. In Riverside, CA, the same checks apply whether the unit went into a stucco bungalow near Fairmount Park or a tract house on the slopes below the Box Springs Mountains. The list below follows the order an installer works through the house, from the outside of the wall to the sash hardware, and explains what each check is meant to catch.

What does an installer look at first on the outside of a new window?

The exterior comes first because that is where water gets its chance. The installer stands back about ten feet and sights along the frame to see whether the top and sides look straight against the wall. A frame that leans out at the top or sags at one corner was not plumbed and leveled properly, and it will show up later as a sash that drags or a gap that opens in summer.

Up close, the sealant bead around the frame gets a slow look from end to end. A good bead is continuous, smooth and slightly concave, and it sticks to both the frame and the wall surface. Gaps, pinholes, places where the bead has pulled away from the stucco and places where it was smeared thin over a void are all marked for reworking. The stucco return around the window is checked for cracks at the corners, since a hairline crack there is where wind driven rain gets in.

The sill gets its own look. The outside edge should slope away from the glass so water runs off, and the weep holes in the bottom of the frame on a slider or a casement should be open and clear. A weep hole plugged with sealant is a common mistake and it turns the track into a small bathtub the first time it rains.

Which checks matter most, and what does each one show?

The table below puts the main walk-through checks in the order they are usually done. None of them needs special tools beyond a level, a tape, a flashlight and a scrap of paper.

Check	How it is done	What it reveals
Plumb and level	A four foot level held on the sill and against each jamb	A frame that was shimmed unevenly, which later binds the sash
Gap around the frame	Tape or feeler gauge between frame and opening on all four sides	Gaps that are too tight for expansion or too wide for the sealant to bridge
Diagonals of the sash	Tape measured corner to corner on the sash	A racked sash, which will not seal against the weatherstripping
Operation	Open and close every sash several times, slowly and fast	Rough spots, hardware that catches, tracks with debris
Weatherstripping contact	A strip of paper slid between sash and frame with the window closed	Places where the seal does not touch, which let in air and dust
Glass	Look at the panes from an angle in daylight	Scratches, cloudiness, moisture between double pane layers, label placement
Interior sill and trim	Hand over the surface and a flashlight at a low angle	Damp spots, loose casing, nail pops, gaps at the drywall return

How is the sash tested after the window is set?

Every sash is opened and closed more than once, because a window that feels fine on the first pass may stick on the fourth. A double hung sash should travel the full height of the frame with an even feel, stay where it is left, and tilt in for cleaning if it is a tilt model. A single hung unit should do the same with the lower sash only. A slider should roll without a grinding sound and lock firmly at the closed end. A casement or an awning window should swing out without rubbing the frame, pull in tight against the weatherstripping when the handle is turned and not drift open on its own.

The paper test is quick and tells a lot. A slip of paper goes between the closed sash and the frame at several points. If it pulls out with no resistance anywhere, the weatherstripping is not touching at that spot, and the sash needs its hinges or its latch adjusted. The test is repeated all the way around, since a sash often seals well at the latch and loses contact at a corner.

What is looked at inside the glass?

Insulated glass is two panes, sometimes three, separated by a spacer and sealed around the edge, with the space between them filled with air or with argon. The panes should be clean and clear. A film or a haze between them, or beads of moisture, means the edge seal failed, and a unit like that is not accepted at the walk-through whatever its age.

The glass also carries a label or a permanent etch that shows the coating and the ratings. A low e coating is a very thin metal layer on one surface of the glass that reflects heat, and the u factor and the solar heat gain coefficient on the sticker describe how much heat passes through. In Riverside the solar heat gain number matters on west facing walls, where late afternoon sun in summer can warm a room quickly. The installer checks that the unit on each wall is the one that was specified for that wall, since ordering mix ups usually show up at this stage.

The last glass check is for chips at the edges, which are easy to miss in bright light. A small chip can grow into a crack after a few temperature swings, so a damaged pane is replaced before the crew leaves.

Why does the inside get as much attention as the outside?

The interior is where a bad installation first announces itself. Water that has gotten past the flashing usually shows at the interior sill, at the lower corners of the casing, or as a faint stain on the wall below the window. Even on a day with no rain, a flashlight held at a low angle across the sill and jambs shows damp spots, swelling and peeling paint that would otherwise be invisible.

The trim gets tapped and pressed. Loose casing is nailed or glued back, and gaps between the casing and the drywall are caulked and painted. Where the wall is old plaster, as in some of the houses near the Mission Inn, the installer also checks that the plaster return around the window was patched flat and did not crack when the old frame came out. The floor below the window is checked for dust, sealant and glass chips, and the sash tracks are vacuumed because a pebble in a slider track will gouge the track within a few weeks.

What is explained before the crew leaves?

A proper walk-through ends with the homeowner standing at each window and operating it. The installer shows how the locks work, how to tilt a sash, where the weep holes are and why they must stay open, and how to clean the tracks. For a casement, the crank and the arm get a short explanation, since a casement forced against a stuck arm is the most common way a new unit gets damaged in the first month.

The homeowner is also shown what normal looks like. A faint bead of condensation on the inside of the glass on a cold morning is normal on any window, and a slight sound when a vinyl frame warms up in the sun is the material moving. Moisture between the panes, water on the interior sill after rain, a sash that suddenly will not close, and a draft that can be felt at the corner of the frame are not normal, and any of them is worth raising right away.

What should be kept after the job is done?

A photo of each window before the trim went back on, the glass label and the date of the work belong in one folder. If a leak ever appears, a photo taken before the casing covered the flashing is worth far more than a description.

How long does the walk-through take?

For an average house the walk-through takes a good half hour. The time goes on doing seven or eight ordinary checks at every window and writing down the defects that turn up, which is why a rushed walk-through leaves problems behind.

A window is only as good as the last twenty minutes of the job. The walk-through is how that part gets measured.