Car thresholds Skoda Roomster - this is one of the most vulnerable elements of the body, which is exposed to aggressive environmental influences. Due to the design features and location at the bottom of the machine, this is where moisture, salt and abrasive dirt accumulate, leading to the rapid development of corrosion. Owners of this practical minivan are often faced with the need to replace or overhaul these elements already at 100โ120 thousand kilometers.
Ignoring even small spots of rust on doorsteps Skoda Roomster can lead to serious structural problems. Corrosion doesn't just spoil the appearance, it reduces the overall rigidity of the body and the safety of the car in a side impact. Timely identification of defects and a competent approach to their elimination will extend the life of your car for many years, maintaining its liquidity in the secondary market.
Design features and causes of corrosion
When designing Skoda Roomster Engineers paid attention to functionality, but protection of the underbody was not ideal. Thresholds have a complex geometry with many internal cavities where moisture enters through drainage holes or microcracks in the paintwork. In winter, when roads are actively treated with reagents, the chemical reaction accelerates significantly, corroding the metal from the inside.
The main cause of rotting is the accumulation of dirt and water at the junction of the sills with arches and bumpers. The water does not have time to evaporate, creating a permanent source of corrosion. In addition, the factory anti-gravel coating peels off over time, exposing the metal. It is important to understand that threshold corrosion often begins hidden, from the inside, and becomes noticeable only when the metal has already rotted through.
Many owners don't notice the problem until a hole appears. Regular visual inspection and probing the metal with a screwdriver are the only ways to identify the beginning of the process. If you notice swelling of the paint or the appearance of red smudges, you must take action immediately, otherwise repairs will cost many times more.
Diagnosis of the condition and choice of recovery method
Before starting repairs, it is necessary to assess the extent of the damage. To do this, you will need to remove the plastic trims and thoroughly clean the sills from dirt and old paint. Use a wire brush and rust remover to get to clean metal. If the metal is less than 30% rotten, you can limit yourself to local repairs using putty and primer.
For more serious damage, when the metal has lost its integrity, a section or the entire threshold will need to be replaced. In the case of Skoda Roomster it is often more profitable and reliable to install a ready-made welded thresholdthan trying to cut and weld pieces of metal. This provides better geometry and higher joint strength.
The method you choose also depends on your budget and equipment availability. Local repairs are available to everyone, while a complete replacement requires welding skills and special tools. You should not skimp on materials, as poor-quality work will lead to repeated rotting within six months.
Materials and tools for work
For high-quality restoration of thresholds, you will need a set of specialized tools and materials. It is necessary to have a welding machine, preferably an inverter type, which provides a stable arc. You also cannot do without a grinder, a set of stripping attachments and a drill. For anti-corrosion treatment, special compounds will be needed, such as bitumen mastic or liquid plastic.
The list of required materials includes:
- ๐ ๏ธ Welding electrodes or welding wire of the appropriate section;
- ๐ ๏ธ Rust converting primer and epoxy primer;
- ๐ ๏ธ Anti-corrosion composition for processing internal cavities;
- ๐ ๏ธ Putty (polyester or epoxy) for finishing leveling;
- ๐ ๏ธ Abrasive materials different grits for grinding.
The quality of the materials used directly affects the durability of the repair. Cheap analogues of primers and mastics often cannot withstand changes in temperature and moisture, quickly peeling off. Choose proven brands that specialize in auto chemicals to ensure maximum protection of the metal from aggressive environments.
Step-by-step instructions for replacing thresholds
The process of replacing thresholds with Skoda Roomster requires accuracy and consistency of actions. Start by removing the plastic elements of the interior and exterior decor to gain free access to fasteners and welds. Carefully remove the old threshold using a grinder, being careful not to damage adjacent body elements. The welding site must be thoroughly cleaned down to metal.
The prepared new threshold is tried on in place, after which it is fixed with clamps. It is important to maintain the correct body geometry so that the doors close tightly and the gaps are uniform. Welding thresholds is carried out using the point method to avoid overheating of the metal and deformation of the body. After welding, the seams are cleaned and treated with a rust converter.
The internal cavities of the new threshold must be treated with an anti-corrosion compound. To do this, you can use special nozzles-guns, which allow you to deliver material to hard-to-reach places. After the anticorrosive has dried, the external surfaces are puttyed and primed before painting.
โ๏ธ Checklist before welding
What to do if you donโt have a welding machine?
If you don't have access to welding, you can use special bolt-on repair plates or liquid cold metal compounds, but they are less reliable under severe loads.
Do not forget about safety precautions when working with metal and chemicals. Use safety glasses, a respirator and gloves. Ventilation in the room must be good to avoid the accumulation of harmful fumes. Safety during repairs is a priority that cannot be ignored.
- Local repair
- Replacing a welded threshold
- Buying a used part
- Contact service
Anti-corrosion treatment and protection
After completion of the main repair, the most important stage begins - anti-corrosion treatment. This will prevent rust from reappearing. Treating internal cavities with special oils or wax-based compounds is critical to the longevity of the repair. These materials create a hydrophobic film that repels moisture and prevents metal from contacting air.
For external surfaces, use a multi-layer protection system: epoxy primer, putty (if necessary), acrylic primer and paint. Each layer must dry completely before applying the next. Pay special attention to the joints and welds, as this is where problems most often begin.
Regular washing and application of protective waxes will help extend the life of the repair. In winter, try to wash your car more often, washing off reagents and salt. Ignoring this rule will negate all your efforts to restore the thresholds.
โ ๏ธ Attention! Never apply putty to rust or uncleaned metal. This will lead to rapid destruction of the coating and the reappearance of corrosion under the paint layer.
Repair costs and alternatives
The cost of restoring thresholds may vary depending on the method chosen and region. Replacing it yourself will cost less, but will require time and effort. The services of specialized service stations will cost more, but you will receive a guarantee for work and quality materials. The average price for replacing one threshold with painting is a significant amount, but it is an investment in the safety and liquidity of the car.
Consider purchasing used thresholds from salvage yards. This can be beneficial if you find a part in good condition from a lower mileage vehicle. However, when purchasing used spare parts, always check them carefully for hidden defects and signs of corrosion. Checking used parts must be careful not to buy a problem instead of a solution.
Comparing renovation options will help you choose the best solution for your budget. You should not chase the lowest price, since poor-quality repairs will have to be redone, which will ultimately cost more.
| Repair option | Approximate cost (materials) | Labor costs | Durability |
|---|---|---|---|
| Local repair (putty) | Low | Average | Low |
| Replacing a welded threshold | Average | High | High |
| Buying a used threshold | Low/Medium | Average | Depends on condition |
| Installation in turnkey service | High | No | Guaranteed |
Before starting work, take photographs of the car from all angles and write down the current condition of the thresholds. This will help control the process and avoid mistakes when assembling the interior.
Safety precautions and expert recommendations
Working with body parts requires compliance with strict safety rules. Welding, cutting metal, and using chemicals pose an increased risk of injury. Always use personal protective equipment: goggles, mask, gloves and fire-resistant clothing. Make sure there are no flammable items in the room and exhaust ventilation is working.
Experts recommend repairing thresholds during the warm season, when temperature and humidity are optimal for drying materials. Winter repairs are possible, but require the creation of special conditions in a heated box. Quality of working conditions directly affects the result. Do not save time on preparing and drying layers.
Remember that the sills are a load-bearing element of the body. Their restoration must be carried out in compliance with all technological standards. Any deviations can lead to loss of body rigidity and handling problems. Entrust complex work to professionals if you are not confident in your abilities.
โ ๏ธ Attention! When using a welder, make sure the car battery is disconnected to avoid damage to electronics and short circuits.
FAQ: Frequently asked questions from owners
Is it possible to weld small holes in thresholds without replacement?
Yes, if the hole is small and the metal around it is strong, you can weld the hole and treat it with an anti-corrosion compound. However, in case of extensive damage, replacing a section or the entire threshold will be more reliable.
How long does it take to replace thresholds on a Skoda Roomster?
The process of replacing one threshold takes from 1 to 2 days, taking into account the time for preparation, welding, priming and painting. Complete replacement of both thresholds can take up to 3-4 days, depending on the complexity of the work and drying conditions.
Do I need to remove the interior to replace the thresholds?
Yes, for good access to fasteners and welds, it is recommended to remove the seats, plastic trims and part of the floor upholstery. This will avoid damage to the interior and ensure proper access to the repair site.
Which anticorrosive agent is best to use for thresholds?
For Skoda Roomster thresholds, wax or bitumen-based compounds are best suited, as they penetrate deeply into the pores and create a long-lasting protective film. Avoid cheap oils that leak quickly and do not protect the metal.
Regular inspection and timely anti-corrosion treatment of thresholds is the key to the long life of the Skoda Roomster body and maintaining its value.