Skip to navigation Skip to content

Why is My Shower Leaking?

Leaking showers are a very common occurrence. Even so, this doesn’t make them any more pleasant, or any easier to resolve. Sometimes the hardest part of dealing with a leaking shower is identifying where it's even coming from, whether it's your screen, tray or even your shower mixer taps, is the first step before tackling the damage and preventing shower leaks in the future.

This article has put together some tips on how to find a shower leak and work out why your shower is leaking in the first place, and how to seal the leak.

Indications That You Have a Shower Leak

Look for the following signs:

  • Presence of mould or mildew in the bathroom, especially around the shower

  • Water stains on the ceiling directly below the shower

  • Paint that is peeling or flaking

These are all tell-tale signs that there is a leak that needs to be fixed and is when it's vital to find out where your shower is leaking from. It could be a really straightforward issue, such as shower doors not being closed in the correct manner, so when you are looking for reasons for your leaking shower, it’s best to start with the basics. Things like damp and mould can often be helped by a simple, but efficient bathroom extractor fan.

First Steps to Take

It's essential to make sure that your shower door is closed correctly, or that there is an ill-fitting shower curtain or shower screen, as both of these can be the cause of water related problems.

To Check This:

  • Splash water against the closed glass, or the drawn curtain, and check to see if any water shows up outside the shower. If your shower curtain is not doing the job it should, you may want to think about fitting a shower or bath screen

  • If you have rubber edgings on your shower screen or doors then any wearing can lead to gaps appearing, so you should check to see if any water is present outside the shower in this area

  • Check any areas of caulking around the bottom of the shower where it is attached to the wall. It is possible that the caulking can break and crack with age, causing leaks

If either the rubber on your shower doors or the caulking is causing the problem, you can easily replace the rubber shower seal at the bottom of the glass with a new one. If however, after splashing water in the shower you cannot identify any obvious leak, you will need to take further action in these next couple of steps.

Spray Water Around the Shower

In order to check the entire shower area for obvious signs of leaking, you should stand inside the shower and spray your shower handset around the cubicle. Begin by spraying at the bottom, where the panelling meets the shower tray, and work your way up the walls, checking for any water exiting the shower as you go.

One common problem that you may identify is the hollow shower profile filling up with water. This usually happens because the area around the shower screen has been sealed which means that the profile or frame is unable to leak into the shower tray as it fills up, and it simply overflows.

The solution to this is to unseal around the screen so that the water can leak into the shower tray. If spraying the water around the shower does not reveal any obvious leaks, you should check the shower tray in more detail.

Testing the Shower Tray

Tom Drake, bathroom expert at Tap Warehouse advises "the most common cause of a shower leakage is having an ill fitted shower tray. It’s possible that there may be crack in the grouting, an unintentional gap between the shower tray and the wall, or a problem with sloping."

If the leak is in the shower tray then it saves you taking time testing the drain, so checking the shower tray first makes good sense. You need time to thoroughly check the shower tray, so you need to choose a day when you are going to be in the house the whole time. Then you need to follow these steps.

  • Make sure the shower drain is completely water tight. You can do this using plenty of duct tape.
  • Use a bucket or other method to fill the shower pan from a source other than the shower head. Obviously, if you use the shower head this negates your ability to isolate the shower tray as a potential leak location.
  • Once the shower tray contains approximately one inch of water you will need to watch for signs of water around the shower.

It’s important to note that if the leak is relatively small it may take several hours for any signs of water to become visible. This is why you need to give yourself plenty of time in the house to check for the leak.

If water becomes visible, and it is evident the problem is with the shower tray, you can take temporary measures by applying some masonry sealant around the tray. It should be noted though that this is not guaranteed to be successful, and in the long run you will probably need to call in a plumber to successfully re-fit the shower tray.

Wet shower tray with a possible leak

Testing the Shower Drain

Leaks can occur around the shower drain, and is especially likely if you have a plastic of fibreglass shower, as when you put pressure on the shower by standing in it, you can break the seal around the drain.

There are a couple of ways you can check your shower drain to identify if a leak is present.

  • If you have access to the underneath of the shower drain then you should plug the drain completely with a rag and switch on the water. Watch the underside of the drain and see if any water is coming though. If it is then you know that there is a leak around the drain.
  • If you don’t have access to the underside of the shower drain then you need to use the same method, but slightly differently. Again you need to plug the drain with a rag, and switch on the water. This time you should let a puddle form in the shower tray and mark the edge of it with a bottle of shower gel, or another available item. Watch to see if the puddle diminishes in size. If it does then you know there is a leak around the drain.

Fixing a drain leak can be simple if you have access to the area underneath the shower, you may just have to tighten the nut that locks the drain in place. If this doesn’t work then you will probably have to replace the drain assembly. If you do not have any access to the underside of the shower via a panel, you may have to gain access through the ceiling below. This is a more complicated task, and you may want to hire a professional pair of hands.

We hope you found this guide helpful in helping you discover where your shower is leaking from. If you have any feedback or questions, please contact our friendly team via live chat or email.

You might also like

Back to top