Broken window repair: what to do in the first hour

Broken window repair almost always goes smoothly — the part that goes badly is the hour before we get there. That’s when people cut their hands sweeping up, vacuum glass into a shop vac that can’t handle it, tape plastic over a sash in a way that traps water in the frame, or throw away the one piece of evidence their insurance adjuster wanted a photo of.

We’ve been replacing broken glass in this valley for 36 years — family owned since 1989 — and the calls we get are rarely emergencies in the way people fear. But they do have an order of operations. Here it is.

1. Make it safe before you make it neat

The urge is to clean up immediately. Resist it for five minutes and set the scene up properly instead.

• Move people and pets out of the room and close the door. Glass travels far — a shattered pane throws fragments well past where the mess looks like it ends.
• Put on real shoes and thick gloves. Leather work gloves, not dish gloves. Long sleeves if you have them.
• Check the sash before you touch it. If jagged shards are still standing in the frame, they’re the thing most likely to cut you, and they can drop on their own without warning.
• If the break involves an upper floor, a door, or a large picture window, stop and call us. Big panes carry real weight, and removing what’s left of one is genuinely dangerous work.

2. Photograph it before you clean up

Two minutes here can save a long argument later. Take wide shots showing the whole window and the room, then close-ups of the break pattern, the frame, and anything damaged nearby — a screen, a sill, flooring, blinds. If something came through the glass, photograph it where it landed.

Also photograph any etched markings in a corner of the glass. Tempered panes carry a small permanent stamp with the manufacturer and safety standard, and that stamp tells us instantly what has to go back in. It’s the single most useful photo you can send us.

3. Clean up glass the way that actually works

Order matters more than tools:

1. Pick up the big pieces by hand (gloved) and put them in a rigid box or a doubled paper bag — not a thin trash bag, which shards will slice through on the way to the curb.
2. Sweep the coarse debris with a stiff broom into a dustpan. Don’t use your good vacuum: glass dust destroys the filter and can crack the canister on a household unit.
3. Get the invisible stuff with tape. Press wide packing tape or a lint roller across the floor, sill, and window track. This is the step almost everyone skips, and it’s the one that keeps somebody from finding a splinter with a bare foot in three weeks.
4. Damp-mop or wipe last, with a paper towel you throw away rather than a cloth you’ll reuse.
5. Check the surprising places — inside the window track, in the folds of curtains, on top of baseboards, in a nearby heating vent, and in a pet’s bed.

Leave the shards still fixed in the frame alone if you can. We’d rather pull them ourselves than have you do it, and it costs you nothing on the quote.

4. Board it up so it holds until the glass arrives

A temporary cover has two jobs: keep weather out and make the opening unattractive to anyone walking by. Ranked by how well they actually do that:

• Plywood cut to the opening, screwed to the frame or blocked from inside. This is the only option that meaningfully deters entry, and it’s what we install on a board-up call.
• Rigid plastic or cardboard behind the glass line, taped on the interior side. Better than nothing, and it doesn’t advertise the damage the way exterior tape does.
• Heavy plastic sheeting and tape as a weather-only measure. Tape it to the frame, never to the surrounding stucco or siding paint, and pitch it so water runs off rather than pooling in the track.

Two things to avoid. Don’t tape directly to the remaining glass in a way that pulls a cracked-but-intact pane out of the frame when you remove it. And don’t seal the opening completely airtight if rain is coming — trapped moisture in a wood frame does its own quiet damage, which is exactly how the rot problems in older homes around here tend to start.

Nine times out of ten the frame is fine and only the glass needs to change. The tenth time is usually a window that was already failing before it broke.

5. Know what kind of glass broke

The break pattern tells you most of what you need to know, and it drives the price and the lead time more than anything else.

That fourth row surprises people every time. In a dual-pane window the two sheets are sealed together with a spacer into one insulated unit — so even if only the outside broke, the whole unit gets swapped. There’s no way to open it up and change one side.

6. What to have ready when you call

Give us these and we can usually quote it over the phone or by text, without a trip out:

• Photos: the whole window from inside, the whole window from outside, a close-up of the break, and any etched corner stamp.
• Rough measurements of the opening — width and height of the glass, plus thickness if you can see a clean edge.
• Single or dual pane, if you know. Look at the edge of the glass: two lines with a metal spacer between them means dual.
• Frame material — aluminum, vinyl, or wood.
• Where it is and how urgent: ground floor, second story, a door, a storefront, or a slider.
• Whether the window still opens and locks. If the mechanism was already stiff, say so — some of the fixes in our stuck window guide get folded into the same visit.

We don’t publish a flat price for broken glass, because size, type, thickness, and access change the number so much that any figure we posted would be wrong for most people. Our glass replacement cost guide walks through what actually drives it. Text us a photo and you’ll get a real number, not a range.

7. Should you file a claim?

This is a math question, and it’s yours to run rather than ours. A single residential pane frequently costs less than a homeowners deductible, which means filing gets you nothing and puts a claim on your record. Larger jobs — a break-in with multiple openings, a big picture window, a commercial storefront — are a different conversation, and commercial policies often treat glass separately from the main deductible.

Practical approach: get the repair quote first, then compare it to your deductible before you call the carrier. We’re happy to write the quote up in whatever form your adjuster wants. We’re not insurance advisors, so check your own policy or ask your agent about the specifics.

8. The one question worth asking while it’s open

An empty frame is the cheapest moment you will ever have to change what goes in it, because the labor is already happening. Worth a thought:

• Was it a single pane? If it broke, it’s a candidate for a single-pane to dual-pane conversion instead of a like-for-like swap.
• Is it a hazardous location? Glass near doors, in bathrooms, at floor level, or beside stairs is where building code can require safety glazing — your city’s plan checker has the final word, but we’ll flag it.
• Was it a break-in? That’s the moment to look at security screens, which stop the entry attempt rather than replacing the glass afterward.
• Was the window already on its way out? If it was fogging, sticking, or drafty before the break, run through the signs you need new windows before spending money on glass alone.
• Is it a road-facing room? Thicker or laminated glass buys some quiet as a side effect — the honest version is in our piece on noise reduction windows.

None of that is a reason to spend more. It’s a reason to spend once.

The bottom line

Safety, then photos, then cleanup, then a cover that keeps weather out without trapping it in. Do those four in that order and the actual broken window repair is the easy part — usually one visit, often faster than people expect.

We handle glass replacement, window repair, and commercial board-ups and storefront glass for Glendora, La Verne, San Dimas, Claremont, Covina, Azusa, Pomona, and Upland. Send a photo to (626) 335-2900 or request a free estimate and we’ll tell you what it takes.