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How to check for bathroom leaks

Usually the first sign of a plumbing leak in your bathroom will be water stains on the ceiling of the room directly below.

This is usually a sign that the leak has caused expensive damage to hidden areas and you’ll need to call out a plumber to take a close look and repair the leak.

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ceiling leak

Most plumbing leaks originate near plumbing fixtures like bath tubs, shower enclosures, sinks and toilets.

By taking the time to look out for some tell-tale signs that your bathroom could have a leak you could save yourself a headache and expensive future repair bill.

Shower leaks

It’s a good idea to check the seals around your shower from time to time as this is somewhere where an undetected leak can lead to a more serious plumbing problem.

Major damage can be caused if water is constantly leaking and coming into contact with the surrounding wall or floor.

peeling paintwork

If left the problem could soon become and expensive plumbing repair because extensive renovation work might also be required.

Wooden floorboards and joists are prone to swelling and eventually rot which can result in an expensive replacement project where your shower tray, or enclosure may have to be removed so that work can begin on the damaged area below.

Things to look out for include peeling paintwork and rotting flooring. If you have vinyl flooring this is more of a problem as water puddles can cause the flooring to curl and deteriorate to such a level where it will allow water to come into contact with whatever is underneath – usually wood.

Shower curtains should be kept inside the bath tub when taking a shower to minimise the risk of puddles of water on your flooring. Mould spots on silicone and seals are another trouble sign. This can often indicate that there are gaps in any silicone that should be repaired.

mouldy silicone

Check shower doors, check the condition of the rubber seals, check for gaps where the shower tray meets the floor. Sometimes sealant is used. If it’s rotten and has gaps scrape it out and apply a new lot. Remember to make sure its completely dry before testing or using your shower.

Bathtub leaks

The same applies to shower enclosure leaks. Check all areas and seals for gaps. It can be difficult to spot some leaks as water tend to disperse very slowly.

Leaks from pipes can be difficult to detect because the pipe is often hidden behind bathroom panelling and walls. In such cases your first notion of a leak will be water stains on the ceiling of the room below.

Bathroom floor leaks

Vinyl flooring is prone to rot and will often curl at edges from prolonged exposure to water.

Tiled floors can leak through cracked tiles or problems with the grouting. Make sure you use a plumber with insurance for bathroom renovations and tiling work as problems in this area can cause major damage.

Bath drain leaks

Leaks around plugs and drains are one of the most common places where a leak can form in a bathroom .

bathroom drain

More often than not the water will leak slowly so it can be difficult to detect. The easiest way to test for a leaking drain or bath plug is to plug the hole and fill the bath tub with a little water. Check back after an hour to see if the water level has dropped. If it has it’s a obvious sign of a leak – although it could also be the seal of the plug stopper so be sure to check this too. It’s a lot cheaper than ripping a bath tub only to find that there isn’t any damage below.

Drain leaks are more common with plastic and fibreglass bathtubs. The same is true of shower enclosures and shower trays. The material is softer than a ceramic so can move slightly as you manoeuvre on top of them. This can sometimes break the seal around the drain or plug hole which can allow water to escape onto the area below.

Tiling leaks

tiles can leak by allowing water to escape through damaged silicone or grouting.

gap in tiling

Escaped water can easily manifest behind walls or drip down onto the floor area, and cause damage. Mouldy tiles are a warning sign that there may be gaps in your grouting or silicon. Often tiles will come loose or fall off as a result.

Toilet leaks

Most leaks that originate from a toilet are caused by a leak between the toilet and the waste pipe. This means that every time your toilet is flushed water will leak. Because your toilet is probably used more often than shower damage to floors can escalate quickly to become expensive plumbing repair jobs.

toilet caulk

If your toilet moves when you sit on it its a sign that you could be in trouble as over time the rocking could potentially break the flange seal and lead to a leak. Check the seals round the bottom of the toilet, where it meets the floor, to make sure that the toilet is secure.

Tap leaks

Leaks around taps will often lead to an area that is hidden so detecting a leak can be difficult.

tap deterioration

Damaged seals and deteriorating silicone areas around taps and faucets can allow water to seep through and damage the area below.

On sinks and basins its usually easier to get a clear view of exactly whats going on underneath the sink so pouring excess water around the top of the tap area and checking the area below is the easiest way to detect a leak here.

Sink leaks

Sink leaks can also occur at pipe joints and in some cases the pipes themselves. It’s always a good idea to check thoroughly at regular intervals. Water running down a pipe and onto the floorboards below can cause them to become swollen and go rotten over time.

hidden piping

Sink drain leaks

Sinks drains can leak in the same ways as bath drains so the same type of checks should be carried out. Puddles and excess water at the base of the basin on the floor are obvious signs that there is a leak.

Call My Plumber if you have a hidden leak

If the leak is hidden the best thing to do is turn off all the water in the house, go out for the day (or at least a couple of hours). When you get home check the water metre. If it’s lower then it’s likely that you have a hidden leak in your plumbing system and you’ll need to call us to come and take a look.

Call us now 020 3078 5920

Disclaimer: The information on this web page is presented for general guidance purposes only and is supplied without liability. Such information is provided in good faith. Whilst every care has been taken in its preparation, no responsibility is accepted for any errors or omissions which it may contain. The information on this may be updated or changed at any time without warning.

How to check for bathroom leaks

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