Shower screen replacement parts are the wear parts that allow you to repair a shower screen without replacing the whole thing: especially the bearings and rollers that slide the glass panels along the track, the seals and gaskets that stop water from passing through, and the profiles, stops or handles. Replacing them restores smoothness and watertightness to the screen at a fraction of the cost.
A shower screen that squeaks, slips when opening or lets a trickle of water through is rarely completely broken: almost always it is a specific part that has reached the end of its life. In this guide we explain what bearings, rollers and seals are, how to identify the one that is failing, how to replace it step by step and at what point it is no longer worth repairing. The product references and systems described are taken from the actual shower screen catalog of Merkimarket.
Key facts about shower screen replacement parts
- Common wear parts: bearings and sliding rollers, seals and watertight gaskets, stops, handles and, where applicable, profiles.
- Typical bearing symptom: the panel opens in jerks, makes noise or derails from the top profile.
- Typical seal symptom: water leaking through the sides or through the meeting point of the panels even though the glass is properly positioned.
- Common glass: 6 mm and 8 mm tempered; the thickness determines the type and size of the bearing.
- Key buying fact: you need the brand, the model or series and the glass thickness; without that data the replacement part may not fit.
- Estimated cost: a set of bearings or seals costs well below a new shower screen; always check the product page for the current price.
- Warranty: shower screens sold to consumers in Spain have a legal minimum of three years against conformity defects.
With this you already have the map; next we develop each part and the replacement process.
Bearings, rollers and seals: what each part is
Before buying anything it is advisable to call each thing by its name, because that is what they will ask you for to locate the correct replacement part.
Bearings and rollers. They are the parts that make a glass panel slide along the track. In sliding shower screens, each panel hangs or rests on two rollers (top, bottom or both) that rotate on a small bearing. When that bearing dries out, fills with limescale or wears out, the panel stops rolling smoothly: that is where the jerks and squeaks begin.
Seals and gaskets. They are the flexible profiles that seal the water. There are several types: the vertical brush or flap seal that joins two sliding panels, the bottom skirt-type seal that closes against the shower tray and the magnetic seals of the hinged doors. When they harden, crack or lose shape, water finds its way.
Stops, handles and profiles. They are secondary but frequent parts: stops that brake the panel, handles that loosen and, in cases of impact, some aluminum profile. They are replaced with basic tools.
How to know which replacement part you need
The most expensive mistake is buying by eye. Each manufacturer designs their rollers and seals with their own geometry, so a "similar" part rarely fits. To get it right, gather this data before ordering anything:
- Brand and model or series of the shower screen. It usually appears on a sticker on the profile or on the purchase invoice.
- Glass thickness (6 or 8 mm): determines the size of the bearing housing.
- Opening type: front sliding, corner, semicircular or hinged. They do not use the same parts.
- A photo of the dismantled part and, if you can, its measurements with a caliper or a ruler.
If you do not keep the documentation, first identify the type of shower screen you have; our guide on shower screen types, measurements and how to choose the correct one helps you recognize the system and describe it well when ordering the replacement part.
Types of bearings and why they fail
Not all bearings fail for the same reason. This table summarizes the most common cases and how they behave, so you know where to look.
| Part type | Where it goes | Symptom when it fails | Common cause |
|---|---|---|---|
| Top roller with bearing | Top track, supports the weight | The panel opens in jerks or derails | Accumulated limescale and bearing wear |
| Bottom guide or roller | Bottom track, guides the panel | The panel comes off the track or rubs | Dirt, impact or broken stop |
| Vertical brush seal | Meeting point between two panels | Water between panels when showering | Hardening and loss of flexibility |
| Bottom seal / skirt | Base of the panel against the tray | Puddle outside the shower tray | Cracks and deformation with use |
| Sliding stop | Ends of the track | The panel hits or does not close well | Breakage from repeated impacts |
Most of these problems share the same enemy: limescale. Hard water dries out the seals and seizes the bearings prematurely, so prevention involves both maintenance and replacement. If limescale has already wreaked havoc on the glass, you will be interested in our guide to remove limescale from the shower screen and leave it like new.
How to change the bearings of a sliding shower screen step by step
Replacing the rollers of a sliding panel is a repair that can be done with basic tools (a screwdriver and little more). Work slowly and with the panel well secured, because tempered glass is heavy.
- Empty and protect the area. Place a towel or cardboard on the shower tray to support the glass and avoid impacts.
- Locate the bearing screws. They are usually on the top and bottom edge of the panel, sometimes under a snap-on trim.
- Dismantle the panel. Loosen the bottom bearings, lift the panel to release it from the top track and carefully pull it towards you. Do it with two people if it is large.
- Remove the old rollers. Unscrew each roller noting its position and orientation; not all are interchangeable between top and bottom.
- Install the new bearings. Place the identical replacements in the same position and tighten without forcing: excessive torque can break the support.
- Replace the panel. First fit the top rollers into their track and then seat the bottom ones. Check that it rolls smoothly throughout the entire range.
- Adjust the height and watertightness. Many bearings allow you to adjust the height with an eccentric screw; adjust it until the panel closes plumb against the vertical seal.
If water still gets in after finishing, the problem was not the roller but the seal: replace it following the same criterion of an identical part.
Maintenance to make replacement parts last longer
A little routine extends the life of bearings and seals by years. Wipe with a cloth after showering to remove limescale before it dries, clean the bottom track with a small brush so that dirt does not accumulate and seize the rollers, and check once or twice a year that the bearing screws have not loosened. Avoid abrasive products on the seals: they dry out the rubber and speed up their replacement. In areas with very hard water, an anti-limescale finish on the glass —like the EnduroShield treatment installed on many screens in the catalog— reduces the limescale that reaches the moving parts.
When to repair and when to replace the shower screen
Repairing almost always pays off: a set of bearings or seals costs a small part of what a new shower screen is worth, and restores the original sliding and watertightness. The repair stops making sense in three cases: when the glass is damaged (a chipped or impacted tempered glass cannot be repaired for safety reasons), when the aluminum profiles are corroded or deformed, or when the model is so old that its replacement parts are no longer manufactured and no part fits.
In those scenarios, replacing the whole shower screen is more cost-effective than insisting. If this is your case, look at current adjustable and reversible models in the shower screen collection; two reference examples are the BASIC sliding shower screen with adjustable 6 mm glass, designed for standard openings, and the custom AKTUAL front shower screen with EnduroShield anti-limescale treatment, when the opening is not exact. And if you are unsure between opening systems, our comparison of sliding, folding or fixed shower screens will guide you.
Frequently asked questions about shower screen replacement parts
Can the bearings of a shower screen be replaced without replacing the whole thing?
Yes. The bearings and rollers are wear parts designed to be replaced. By dismantling the sliding panel and replacing the rollers with identical ones, the shower screen regains its sliding without the need to replace the glass or the profiles.
How do I know which bearing or roller I need?
You need the brand and the model or series of the shower screen, the glass thickness (6 or 8 mm) and the opening type. Ideally, dismantle the part, photograph it and measure it, because each manufacturer uses their own geometry and a "similar" roller usually does not fit.
Why does my sliding shower screen move in jerks or derail?
It is almost always accumulated limescale or wear in the top bearings, or dirt and a broken stop in the bottom track. Clean the guide first; if the jerking persists, it is time to replace the rollers.
When is it not worth repairing and is it better to replace the shower screen?
When the tempered glass is chipped or impacted, when the aluminum profiles are corroded or deformed, or when the model is so old that compatible replacement parts no longer exist. In those cases, a new shower screen is more profitable and safer.
Article written by the Merkimarket editorial team. The systems and features (glass thicknesses, profiles, anti-limescale treatments) are taken from the product pages of the Merkimarket shower screen catalog. The availability and prices of replacement parts may vary; consult each product page for the current information in Spain.
