rock chip
Rock Chip Repair Is Not a Windshield Service. Here's the Difference
8 min read
If you searched this because there's a chip in the glass on your car, I want to save you a call before you dial: I don't do vehicle glass, not cars, not trucks, nothing with a motor. What I fix is architectural glass, the windows and doors in a house, a condo, or a storefront. Rock chips and short cracks in that kind of glass are often a same-day repair, and here's exactly how I decide.
A chip smaller than a quarter, or a crack shorter than a dollar bill and out of your direct sightline, is almost always a repair, not a replacement.
Is Rock Chip Repair for a House, or Is It a Windshield Thing?
Rock chip repair exists on two completely different sides of the glass trade, and they don't overlap. One side is the glass across the front of a car, chipped by a stone kicked up on I-95 or the Turnpike. That's not a job I take, full stop. What I do is architectural glass: window panes, sliding door panels, and shower enclosures, chipped by anything from a lawn mower rock to a slammed screen door to a stray baseball off a kid's bat in the backyard.
Same phrase, same-looking damage from across the room, and a completely different material, mounting method, and repair process underneath it. If the chip is in the glass on a car, you need a mobile shop that works on vehicles, because I won't be able to help with that call. If the chip is in a window, a sliding door panel, or a shower enclosure, keep reading, because the size-and-location rule below is exactly how I decide whether it's a same-day fix or a full pane replacement.
How Do I Know If a Chip in My Window or Door Glass Is Repairable?
Most chip calls come down to two things: how big the damage is, and where it landed. My rule of thumb is a chip smaller than a quarter, or a crack shorter than a dollar bill, sitting outside your direct line of sight through the glass. Meet both of those and it's almost always a same-day resin fill instead of a full pane swap.
Here's what I'm actually checking on site:
- Size. Chip smaller than a quarter, or a crack shorter than a dollar bill.
- Location. Near the edge of the pane, where stress concentrates and a crack is far more likely to keep running.
- Sightline. Will you look straight through the repaired spot every day, or is it in a corner you'd forget about in a week?
- Glass type. Standard window glass can usually take a repair. Tempered glass cannot, no matter how small the chip is.
That last one trips up more homeowners than any other factor, which is exactly why it gets its own section next. If the check above says repair, rock chip repair on a window or door pane is exactly the job I described.
Why Can't a Chip in Tempered Glass Get the Same Repair a Window Chip Gets?
Standard window glass, sometimes called annealed glass, is a single sheet with even stress running through it, which is exactly why a resin fill on a small chip holds up over time. Tempered glass is made differently: it's heat treated so the surface sits under high compression and the core under tension, which is what makes it several times stronger under normal, everyday use. That same heat treatment is why it won't take a localized repair. Once the surface compression layer is broken by a chip or a crack, the pane's whole stress balance is compromised, and under the federal safety glazing standard, CPSC 16 CFR 1201, tempered glass is built to fail safely into small, blunt pieces all at once rather than hold a partial crack. There's nothing to fill.
Sliding door panels, shower doors, and most door glass near a walking path are commonly tempered, which is why a chipped shower door or slider panel is usually a full-pane job, not a repair, regardless of how small the chip looks sitting there.
| Laminated Glass | Tempered Glass | |
|---|---|---|
| Common use here | Impact windows, some door sidelites | Sliding doors, shower doors, most door panels |
| Chip or short-crack repair | Often yes, if size and sightline check out | No, a spot repair isn't possible |
| How it fails | Cracks, but the interlayer usually holds the pieces together | Fails all at once into small blunt pieces |
| The fix | Resin fill on the chip or crack | Full pane replacement, no partial fix exists |
If what you're looking at is already past a small chip, closer to a running crack across the pane, my repair-versus-replace rule walks through the same size-and-sightline math for deciding whether the whole pane has to come out.
What Rock Chip Calls Actually Look Like Around Palm Beach County
Most of the chip calls I get around here trace back to yard work, not storms. A mower or a weed trimmer throws a piece of shell rock or landscaping gravel into a ground-floor window or a low sliding door panel, and that's the call the next morning. Afternoon thunderstorms add a second wave: wind-driven debris tapping a chip into glass that's already under stress from a hot afternoon and a fast temperature drop when the rain finally hits.
Hurricane season runs June 1 through November 30 per the National Hurricane Center, and a chip that sits quiet in April can start running once storm season's heat cycling and wind events start working on it. I'd rather fill a repairable chip early than have a homeowner discover mid-storm-watch that it's grown into a full crack overnight. If you're in a condo, check with your association before scheduling exterior glass work of any kind. A lot of Palm Beach County boards treat exterior-facing glass as a common element, and that approval process varies building to building, so confirm it with yours rather than assuming either way. It's one of the more common calls I get out of Boca Raton and the rest of the county, especially heading into storm season.
Frequently Asked Questions
Does rock chip repair on a window mean the same thing as fixing a chip in a car window?
No. It's the same phrase used in two different trades, on two different kinds of glass. I work on architectural glass, the windows and doors in a house or a building, and I don't work on cars at all. If the chip is in a car window, you need a mobile shop that handles vehicles, not me.
Can a chip in a sliding glass door be repaired the same way a chip in a window can?
Usually not. Most sliding door panels and shower doors are tempered glass, and tempered glass can't take a localized chip repair no matter how small the damage looks. If the panel is tempered and chipped, the fix is a full pane replacement, not a resin fill. The one exception is a door built with laminated glass instead of tempered, which is worth confirming before assuming either way.
How small does a chip or crack have to be to qualify for a repair instead of a full pane replacement?
My rule of thumb is a chip smaller than a quarter, or a crack shorter than a dollar bill, sitting outside your direct line of sight through the glass. Once a crack reaches the edge of the pane or crosses somewhere you actually look through, I tell people to replace the glass instead. Size, location, and sightline decide it, not how anyone feels about the cost.
Is a rock chip repair covered by homeowners insurance?
That depends entirely on your policy and what caused the chip, so I never tell a homeowner their claim will or won't be covered. Storm-related damage tends to get more consideration than a stray rock from routine yard work. Check your specific policy, or the Florida Office of Insurance Regulation has consumer resources on how coverage generally works if you want to understand your policy before calling your carrier.
Will a repaired chip show later, or is there a chance it spreads again after the fix?
A properly cured resin fill on a chip that qualifies is close to invisible and stops that specific damage from spreading further. It doesn't make the rest of the pane immune to a brand-new chip or crack somewhere else. That's exactly why the size-and-sightline check matters up front, because it's the line between a repair that holds for good and one that's just delaying a replacement.
Get a Straight Answer on Your Chip or Crack
If you're not sure whether that chip in your window or door glass is a same-day fix or a sign the whole pane needs to come out, send me a photo and I'll tell you straight before I ever get in the truck. Get in touch and I'll walk you through it.
Owner at 24HR McGrath Glassman, working glass jobs across Palm Beach County.