Side sills: role, service and price
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Side sills: role, service and price

The rocker key designates a part of your vehicle's bodywork. In particular, it is located in its lower lateral part between the wheels. Thus, the threshold can also designate a shield located at the front or rear of the vehicle.

🚗 What role does the vehicle sill play?

Side sills: role, service and price

The windowsill plays a decisive role in aerodynamics your car. Indeed it is limit the amount of air a passageway under the vehicle so that it does not lift off the ground. The closer the sill is to the ground, the more car grip will be good and its performance will be better at high speed.

It also allows reduce air resistance and direct whatever hits the front wheels to the rear wheels. Finally, it brings protection is essential for the mechanical elements under the floor of the car, limiting protrusions and the ingress of dirt.

The window sill is not present on all vehicles. He will only be present at sports models (GT or GTI) or it can be added optional by car. In addition, it can be installed by the driver himself if he is a follower setting.

Thus, the window sill has also become an aesthetic choice as it can be personalized according to the wishes of the motorist.

It should be noted that installing a window sill with your own hands requires authorization from DREAL (Regional Office of the Environment, Planning and Housing) and you must inform the insurer in charge of insuring your car.

🛠️ How to take care of the windowsill?

Side sills: role, service and price

Due to its proximity to the ground, the windowsill is often covered with dirt or may be subject to low-intensity impacts, such as on the sidewalk. If you want to keep your windowsill, there are several ways to clean and repair it, for example:

  • Degreaser : allows you to cleanse the entire lower body with a sponge and restore its radiance;
  • Auto body wiper : it is also applied to the windowsill and you can leave it to act for one minute before rinsing with a high pressure jet;
  • Jar of white vinegar : It is also very effective for cleaning the windowsill and removing all stains and crust deposits;
  • Vaporizer WD-40 : This product is designed to remove tar marks on the underbody or bodywork;
  • Du body sealant : This will fill in irregularities on the windowsill, such as bumps, dents or even fairly deep scratches. It can be plastic, tin, fiberglass, carbon, or polyester.

Maintaining your windowsill regularly will prevent deterioration or rusting in the most severe cases.

👨‍🔧 How to straighten a window sill?

Side sills: role, service and price

After the shock, your windowsill may sink in some places. It exists 3 different methods straighten it yourself if you feel comfortable performing this maneuver. Thus, you can choose the following methods:

  • Manual recovery : This can be done with a nail puller and an inertial hammer. It is necessary to use the mastic after you have stretched the sheet to homogenize it.
  • Trepanation : it consists of cutting out the sunken area and re-welding in its original state. This method requires a welding machine and complete bodywork tools with putty and paint.
  • La suction cup for the body : can handle unevenness of various sizes, such as gravel or hail. The suction cups are shaped from 2 to 200 mm.

💸 How much does it cost to replace a window sill?

Side sills: role, service and price

If your windowsill just needs to be straightened, this intervention will cost you from 50 € and 250 € from an experienced locksmith. However, if it is necessary to replace the complete sill on both sides, it will be necessary to take into account the price of the part as well as the cost of labor.

On average, the price of a new rocker panel ranges between 30 € and 200 € depending on models and brands. Thus, if you add up the working hours, the total amount for this operation will be between 80 € and 350 €.

Previously reserved for sports cars, the thresholds were gradually democratized by sports cars. Today it can be added to any vehicle model to improve its aerodynamics and maximize its performance on the road.

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