Replacing a car windscreen may seem like a daunting task, but it’s one that can be completed with patience and careful attention. Indeed, many drivers are unaware that they can save themselves a considerable amount by replacing their own windscreen. Whether you’re dealing with a minor crack or a complete shatter, this comprehensive guide will provide you with step-by-step instructions on how to replace a car windscreen. So, if you’re ready to tackle this project and save some money in the process, then let’s get started!
Before you begin, it’s important to gather all of the necessary tools and materials. You will need a new windscreen, a windscreen removal kit, adhesive primer, a sealant gun, and a utility knife. Once you have everything you need, you can start by removing the old windscreen. To do this, carefully cut around the edges of the windscreen with the utility knife. Be sure to wear gloves and eye protection while doing this. Once the windscreen is cut, you can use the windscreen removal kit to remove the old adhesive. Be sure to clean the area around the windscreen thoroughly before applying the new adhesive.
Once the old windscreen has been removed, you can begin installing the new one. First, apply a bead of adhesive primer to the area around the windscreen. Then, carefully place the new windscreen in place and press it down firmly. Be sure to use a sealant gun to apply a bead of sealant around the edges of the windscreen. Once the sealant has dried, your new windscreen will be securely in place. Replacing a car windscreen may seem like a daunting task, but it’s one that can be completed with patience and careful attention. By following the steps in this guide, you can save yourself a considerable amount by completing this project yourself.
Assessing Windscreen Damage
Windscreen damage can range from minor chips to large cracks, each requiring different repair or replacement solutions. Assessing the severity of the damage is crucial for determining the appropriate course of action.
Types of Windscreen Damage
| Damage Type | Description |
|---|---|
| Chips | Small, localized areas of damage, typically caused by stone impacts. |
| Cracks | Linear breaks in the windscreen, which can vary in size and severity. |
| Star Breaks | Multiple cracks radiating from a central point, often caused by impact. |
| Bullseyes | Circular cracks caused by blunt force impacts, often from objects such as rocks. |
| Laminate Separation | Delamination between the inner and outer layers of the windscreen, caused by moisture or temperature extremes. |
Assessing Windscreen Damage
To assess windscreen damage, follow these steps:
- Identify the type of damage (e.g., chip, crack, or other).
- Determine the size and location of the damage.
- Check if the damage is within the driver’s line of sight.
- Measure the length of any cracks (using a ruler or tape measure).
Once you have assessed the damage, you can determine if it requires repair or replacement. Minor chips and cracks may be repairable, while more severe damage typically necessitates windscreen replacement.
Determining Replacement Need
Cracks and Chips
Chips and cracks are the most common reasons to replace a windscreen. A chip is a small, round or oval-shaped mark on the windscreen. A crack is a break in the glass. Chips and cracks can be caused by stones, debris, or other objects striking the windscreen. The size and location of the crack or chip will determine whether it needs to be replaced. Small chips or cracks may be repaired, while larger ones will need to be replaced.
While it’s recommended to replace a windscreen with a crack that extends more than a dollar bill’s length or is directly in the driver’s line of sight, some states may have specific laws regarding the size and location of a crack that requires a replacement.
Other Signs of Damage
Other signs of windscreen damage that may necessitate replacement include:
- Scratches
- Clouding
- Delamination (separation of the glass layers)
- Distortion
Severity of Damage
The severity of the damage will determine whether the windscreen can be repaired or needs to be replaced. A repair is typically an option for small cracks or chips that can be filled with resin. A replacement is necessary for larger cracks, chips, or other types of damage that cannot be repaired.
It’s crucial to remember that driving with a damaged windscreen can impair visibility and compromise safety. If you notice any signs of damage, it’s advisable to have your windscreen inspected and replaced if necessary.
Gathering Necessary Tools and Materials
Replacing your car’s windshield is a straightforward task that can be completed using basic tools. Here’s a list of everything you’ll need to get started:
1. New Windshield
The first and most important thing you’ll need is a new windshield. Make sure to order the correct size and type of windshield for your car.
2. Urethane Adhesive
Urethane adhesive is the glue that will hold your new windshield in place. It’s important to use the correct type of adhesive for your car, so be sure to consult your owner’s manual or a professional.
3. Removal Tool
A removal tool is used to cut through the urethane adhesive and remove the old windshield. There are many different types of removal tools available, so you can choose the one that you’re most comfortable using. Some of the most common types of removal tools include:
- String removal tool: This tool uses a thin string to cut through the adhesive.
- Piano wire removal tool: This tool uses a thin piano wire to cut through the adhesive.
- Cold knife removal tool: This tool uses a sharp, cold knife to cut through the adhesive.
- Strip removal tool: This tool uses a thin strip of metal to cut through the adhesive.
Choosing the Right Windscreen
Selecting the right windscreen for your vehicle is paramount, as it significantly impacts safety, clarity, and vehicle aesthetics. Here are key factors to consider:
Windscreen Type
Windshields come in three main types: laminated, tempered, and acoustic. Laminated windscreens feature a durable plastic layer sandwiched between two sheets of glass, preventing shattering and providing added safety. Tempered windscreens are treated with heat and cooling processes to make them stronger than regular glass. Acoustic windscreens incorporate a layer of sound-absorbing material to reduce road and wind noise.
OEM vs. Aftermarket
Original Equipment Manufacturer (OEM) windscreens are made to meet the exact specifications of your vehicle. They guarantee the perfect fit and are often used by insurance companies and authorized repair centers. Aftermarket windscreens are made by third-party manufacturers and may vary in quality and fit. However, they often offer lower prices and additional features such as tinted glass or rain sensors.
Glass Quality
The quality of the glass used in the windscreen affects its durability, clarity, and safety. Pilkington, AGC, and Saint-Gobain are renowned glass manufacturers known for producing high-quality windscreens that meet safety standards.
| Glass Manufacturer |
|---|
| Pilkington |
| AGC |
| Saint-Gobain |
Sensors and Features
Modern windscreens may incorporate various sensors and features such as rain detectors, lane departure warning systems, and head-up displays. It’s important to ensure the new windscreen is compatible with your vehicle’s electronics.
Preparing the Vehicle
Before replacing the car’s windscreen, several key steps must be taken to prepare the vehicle properly. These steps include:
1. Remove the wiper blades. Using a screwdriver or a pair of pliers, carefully remove the wiper blades by squeezing the plastic tab or pressing down on the release button.
2. Protect the vehicle’s interior. Cover the dashboard, seats, and steering wheel with drop cloths or plastic sheeting to prevent any glass shards from damaging them during the windscreen removal process.
3. Disconnect the battery. To prevent any electrical malfunctions, disconnect the negative terminal of the battery. This step is crucial for vehicles with electronic stability control systems.
4. Remove the trim pieces. Locate and remove the plastic or rubber moldings that surround the windscreen using a pry tool or a plastic knife. Be cautious not to damage the trim pieces during removal.
5. Cut the urethane seal. Urethane is a type of adhesive used to seal the windscreen to the vehicle’s frame. To break the seal, use a sharp utility knife to carefully slice through the urethane along the edges of the windscreen. Apply firm and steady pressure to avoid damaging the frame or the new windscreen. It’s essential to wear safety glasses and gloves for this step.
| Urethane Removal Tool | Description |
|---|---|
| Urethane-Cutting Knife | A sharp utility knife with a long, thin blade specifically designed for cutting urethane sealant. |
| Urethane Removal Wire | A thin, flexible wire with a sharp tip used to slice through urethane sealant. |
| Urethane Removal Tool | A heavy-duty tool with a metal blade or wire loop used to cut and remove large sections of urethane sealant. |
Removing the Old Windscreen
Once the trim has been removed, it’s time to remove the old windscreen. This is a delicate process, so it’s important to be careful. Here’s how to do it:
1. Cut the Urethane Sealant
Use a sharp utility knife to carefully cut through the urethane sealant around the perimeter of the windscreen. Be careful not to damage the paint or the metal frame.
2. Apply Pressure
Once the sealant is cut, apply gentle pressure to the windscreen from the inside of the vehicle. This will help to break the seal and loosen the windscreen.
3. Remove the Windscreen
Once the seal is broken, carefully lift the windscreen out of the frame. Be careful not to drop it, as it can be heavy and fragile.
4. Clean the Frame
Once the windscreen is removed, clean the frame of any remaining sealant or debris. This will help to ensure that the new windscreen fits properly.
5. Inspect the Frame
Before installing the new windscreen, inspect the frame for any damage. If there is any damage, it will need to be repaired before the new windscreen can be installed.
6. Apply Primer
Once the frame is clean and undamaged, apply a primer to the surface. This will help to create a good bond between the new windscreen and the frame.
Installing the New Windscreen
1. Prepare the Vehicle: Remove any interior panels or trim that may obstruct the windscreen. Protect the surrounding areas with masking tape or a drop cloth.
2. Position the Windscreen: Carefully place the new windscreen in position, aligning it with the bodywork and existing molding.
3. Secure the Windscreen: Apply an automotive-grade adhesive to the bonding surface of the windscreen. Use a bead of adhesive around the perimeter and press the windscreen into place.
4. Use Support Blocks: Place support blocks or clamps around the windscreen to hold it securely while the adhesive sets.
5. Install the Trim: Trim the excess adhesive and reinstall any interior panels or trim that was removed.
6. Allow Curing Time: Parking the vehicle in a dry, protected area and allowing the adhesive to cure fully according to the manufacturer’s recommendations.
7. Detailed Steps for Using an Automotive Adhesive Gun:
| Step | Description |
|---|---|
| 1. | Load the adhesive cartridge into the gun. |
| 2. | Attach a nozzle to the cartridge and cut it to the desired bead width. |
| 3. | Hold the gun perpendicular to the bonding surface at the recommended distance. |
| 4. | Apply the adhesive smoothly and evenly, following the perimeter of the windscreen. |
| 5. | Use a beading tool to create a uniform bead shape. |
| 6. | Clean any excess adhesive from the nozzle and the bonding surface. |
Finishing the Installation
9. Fill the Gap
With the glass securely in place, you can now fill the gap between the windshield and the frame using the manufacturer-specified adhesive. Use a caulking gun to apply a continuous bead of adhesive to the entire perimeter of the windshield. Ensure the adhesive is evenly distributed and does not create any air pockets.
| Recommended Adhesive | Properties |
|---|---|
| Polyurethane-based adhesives | High strength, water-resistant, and paintable |
| Polyvinyl acetate (PVA)-based adhesives | Flexible and easy to clean up, but not as durable as polyurethane |
10. Remove Excess Adhesive
After applying the adhesive, use a clean cloth or scraper to remove any excess adhesive that has seeped out. It is important to remove as much excess adhesive as possible as it can affect the appearance and durability of the seal.
11. Install Trim and Moldings
Once the adhesive has set, you can reinstall the trim and moldings around the windshield. These components help to enhance the appearance of the vehicle and protect the windshield from the elements. Ensure that they are securely fastened and aligned correctly.
12. Clean Up
Finally, clean up any remaining adhesive residue or dirt from the windshield and vehicle exterior. Use a glass cleaner and a soft cloth to remove any smudges or streaks on the windshield. Check for any air leaks or gaps around the edges of the windshield. If any are found, seal them with additional adhesive.
Post-Installation Care
Following the installation of your new windscreen, it is crucial to follow proper care instructions to ensure its longevity and performance.
1. Avoid Car Wash for 24 Hours
Allow the adhesive to cure completely by avoiding car washes for at least 24 hours.
2. Don’t Apply Pressure
Refrain from pressing or leaning on the windscreen for the first few hours.
3. Keep It Clean
Gently clean the windscreen with a soft cloth to remove any debris or fingerprints.
4. Use Non-Abrasive Cleaners
To prevent scratches, use only non-abrasive cleaners specifically designed for automotive glass.
5. Avoid Heat Exposure
Protect the windscreen from extreme heat by parking in shaded areas or using a windshield sunshade.
6. Be Cautious After Rain
Allow the windscreen to dry thoroughly before driving at high speeds, as water on the surface can impair visibility.
7. Regular Inspections
Periodically check the windscreen for any cracks, chips, or damage, and address them promptly.
8. Touch-Ups
If minor scratches or chips occur, consider using a touch-up kit to repair them and prevent further damage.
9. Use a Rain Repellent
Apply a rain repellent to improve visibility in wet weather conditions.
10. Proper Windscreen Wiper Care
Replace windscreen wipers regularly to maintain clear visibility, and avoid using dry or damaged wipers, as they can scratch the glass. Consider using silicone-treated wipers for improved performance.
How To Replace Car Windscreen
If your car windscreen is cracked or damaged, you must replace it as soon as possible. A cracked or damaged windscreen can impair your visibility and make it dangerous to drive, increasing the risk of an accident. Replacing a car windscreen is a relatively simple process that can be completed in a few hours with the right tools and materials.
Materials You Will Need
- New car windscreen
- Windscreen removal kit
- Glass cleaner
- Rubbing alcohol
- Primer
- Urethane adhesive
- Caulking gun
- Putty knife
- Measuring tape
Instructions
- Prepare the New Windscreen
Clean the new windscreen thoroughly with glass cleaner and rubbing alcohol to remove any dirt or debris. Apply a thin layer of primer to the edges of the windscreen where the urethane adhesive will be applied.
- Remove the Old Windscreen
Use the windscreen removal kit to carefully remove the old windscreen. Be careful not to damage the frame of the car. Once the old windscreen is removed, clean the frame thoroughly with glass cleaner and rubbing alcohol.
- Apply the Urethane Adhesive
Apply a bead of urethane adhesive to the frame of the car where the new windscreen will be installed. Use a caulking gun to apply the adhesive evenly and smoothly.
- Install the New Windscreen
Carefully place the new windscreen into the frame and press it firmly into place. Use a putty knife to smooth out the edges of the adhesive.
- Allow the Adhesive to Cure
Allow the urethane adhesive to cure for at least 24 hours before driving the car. During this time, do not open or close the windows or doors.
People Also Ask
How much does it cost to replace a car windscreen?
The cost of replacing a car windscreen varies depending on the make and model of the car, the size of the windscreen, and the location of the repair. On average, you can expect to pay between $200 and $500 for a new windscreen.
Can I replace a car windscreen myself?
Yes, you can replace a car windscreen yourself, but it is important to have the right tools and materials. If you are not comfortable doing it yourself, you can take your car to a mechanic or auto glass shop.
How long does it take to replace a car windscreen?
Replacing a car windscreen typically takes between 2 and 4 hours. However, it is important to allow the urethane adhesive to cure for at least 24 hours before driving the car.
