# QR codes for car washes

> A car wash is an unattended site: payment and membership codes must work from the driver's seat. Mount codes at 1.0–1.3 m so they sit level with a car window, size them 5–10 cm for a half-metre-to-metre scan, and print on laminated aluminium composite: paper does not survive a wash bay.

Source: https://useqr.app/qr-codes-for/car-washes · Last reviewed 2026-08-21 · UseQR is free forever, no signup.

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## Unattended means the code is the staff

At a self-service or automatic wash there is nobody to ask, so the codes carry the whole
customer interaction:

| Code | Where | Why |
|---|---|---|
| Payment or top-up | Bay entrance sign, at window height | The machine takes the money; the code handles app payment and top-up |
| Membership / unlimited plan | Same sign, and exit signage | The buyer is someone mid-wash discovering they will come back |
| [Feedback and damage claims](/feedback-qr-code) | Exit lane sign | A claim route that exists beats a one-star review that mentions it |
| [Offer](/coupon-qr-code) | Street-facing sign | Off-peak discounts changed without reprinting the sign |

## The geometry of scanning from a driver's seat

The defining constraint is that the customer is seated in a car:

- **Mounting height 1.0–1.3 m**, level with a lowered driver's window on everything
  from a hatchback to an SUV. Signs at pedestrian eye height (1.6 m+) force drivers to
  lean out or get out.
- **Scan distance 0.5–1 m** from window to sign → **5–10 cm** code by the
  [distance rule](/docs/reference/qr-code-size-by-distance-table).
- Angle the sign a few degrees toward the driver's position rather than square to the
  lane, reducing skew at the camera.
- Never expect a scan **through** a closed windscreen: tint, rake and reflections
  defeat it. The design assumption is an open side window.

## Materials: a wash bay is a torture test

High-pressure spray, detergent, wax mist and sun. Paper and standard vinyl fail in
weeks. Use [weatherproof laminated stickers](/docs/print/weatherproof-qr-code-stickers)
on aluminium composite board, matt-laminated, a wet gloss panel under floodlighting is
pure [glare](/docs/print/qr-codes-on-glossy-surfaces-and-glare). The
[outdoor durability guide](/docs/print/qr-codes-outdoors-durability) covers UV fade;
budget to replace bay signage yearly rather than discovering the fade when scans stop.

## What goes wrong

- Codes mounted at walking-eye height, unreachable from a car seat.
- Gloss signs that scan fine dry and mirror the floodlights the moment they are wet.
- A damage-claim code that opens a generic contact page: claims need a form that
  captures bay number, time and photos, or the one-star review does it instead.

## FAQ

### What height should a QR code be for drivers?

Between 1.0 and 1.3 m from the ground (window height for most cars) angled slightly
toward the driver. Size it 5–10 cm for the 0.5–1 m gap between a side window and the
sign, and assume the window is open, not closed.

### What material survives QR signage in a car wash?

Matt-laminated print on aluminium composite. Paper and unlaminated vinyl fail within
weeks under pressure spray and detergent, and gloss finishes glare when wet. Expect UV
to erode contrast; plan yearly replacement of bay signs.

### Do car washes need dynamic QR codes?

Not usually. Payment, membership and claim URLs are stable, so static codes pointing at
pages you update work indefinitely. If you want per-bay scan analytics, that is a
tracking question (see how-to-track guidance), not a reason to rent your URLs.

## Try it

- https://useqr.app/url
- https://useqr.app/coupon
- https://useqr.app/feedback