When a Windshield Needs to Be Replaced
A windshield does more than keep out wind and rain. It supports the roof in a rollover, helps the passenger-side airbag deploy correctly, and gives you a clear view of the road. Replacement is usually recommended when repair cannot restore the glass safely. Common reasons include a long crack, damage at the edge, damage in the driver's line of sight, many chips, or glass that is pitted or hazy.
- Most replacements take about one to two hours, plus time for the adhesive to cure.
- The vehicle is typically not safe to drive until the adhesive has set. Ask the installer how long.
- Newer vehicles with forward cameras may need calibration afterward.
- Many installers will do the work at your home or workplace.
How Windshield Replacement Is Done
- Protect the vehicle. The installer covers the hood, dash, and seats.
- Remove trim and the old glass. The adhesive bead is cut and the damaged windshield is lifted out.
- Prepare the frame. The metal edge is cleaned and a thin layer of the old adhesive is left, or trimmed, for a clean bond. Any rust is treated.
- Apply primer and urethane adhesive. A new bead of adhesive is laid around the frame.
- Set the new glass. The windshield is placed carefully into position.
- Reinstall trim, sensors, and mirrors that were removed.
- Cure. The adhesive needs time to harden. Drive-away time depends on the adhesive, temperature, and humidity.
How Long Before I Can Drive?
The adhesive is what holds the windshield in place and what keeps the airbag working correctly, so installers specify a safe drive-away time. This is commonly somewhere between 30 minutes and a few hours, depending on the product and the weather. Humid Gulf Coast conditions can affect cure time. Follow the installer's instructions, and ask exactly how long to wait.
After You Get a New Windshield
- Leave the retention tape on for as long as the installer says.
- Avoid slamming doors for the first day. A sudden pressure change inside the car can disturb a fresh seal.
- Keep the vehicle out of a car wash with high-pressure water for a short period, as advised.
- Check for leaks or wind noise in the first few days. A reputable installer will fix them.
Types of Windshield Glass
| Type | What it means |
|---|---|
| OEM | Made by or for the vehicle maker, the same as the original glass. |
| OEE (original equipment equivalent) | Made to the same specifications by another manufacturer. |
| Aftermarket | Made by third-party manufacturers. Quality and fit vary, and some cost less. |
Ask which type is quoted. Vehicles with cameras or sensors in the windshield can be sensitive to glass quality and clarity. See ADAS camera calibration.
Replacement vs. Repair
If the damage is small, repair is usually faster and less expensive. See the guide to chip and crack repair for how to tell the difference. When replacement is needed, a cracked windshield should not be put off, as it can fail an inspection, obstruct your view, and weaken the vehicle's structure.
Questions to Ask Before You Hire an Installer
- Is the quote for OEM, OEE, or aftermarket glass?
- What adhesive do you use, and what is the safe drive-away time?
- Does my vehicle need ADAS calibration, and is it included?
- Do you offer mobile service, and is there an extra charge?
- What does the warranty cover, such as leaks and defects, and for how long?
- Are you licensed and insured, and will you work with my insurance?
Frequently Asked Questions
How long does windshield replacement take?
The installation often takes about one to two hours. After that, the adhesive needs time to cure before it is safe to drive. The installer will tell you how long.
How long before I can drive after a windshield replacement?
Commonly from about 30 minutes to a few hours, depending on the adhesive and weather. Always follow the installer's guidance.
Do I need ADAS calibration after a new windshield?
Many newer vehicles with forward-facing cameras or sensors need calibration after the windshield is replaced. Check your vehicle and ask the installer.
Is OEM glass better than aftermarket?
OEM glass matches the original. Aftermarket glass can be less expensive, but fit and clarity vary. For vehicles with cameras, ask what the installer recommends.
Can a windshield be replaced at my house?
Many installers offer mobile replacement. Conditions such as rain can affect whether the work can be done outdoors.
Can I drive with a cracked windshield?
It depends on the crack, but a cracked windshield can weaken the glass, block your view, and may lead to a citation. Get it looked at promptly.
See also: chip and crack repair, ADAS calibration, cost guide.