Posted by David MacKenzie, Friday 29th May, 2026
Water leaks from a shower because a pipe, fitting, seal, or grout line is no longer keeping water where it should. This can also indicate that the waterproofing layer in the shower screen may be damaged.
A leaking shower can be obvious, such as water running onto the bathroom floor, or it can be hidden behind tiles, walls or flooring. In some cases, the shower seems to work normally, but damp carpet, swollen skirting boards, peeling paint or ceiling stains nearby reveal that water is escaping somewhere.
The hard part is working out whether the leak is coming from the plumbing, the shower screen, the silicone, the grout, the shower base or the waterproofing.
These problems can look similar from the outside, but they are not fixed the same way.
In the article below, David discusses some of the most common shower leaking issues we fix on a daily basis and what can be repaired yourself, or when its time to call a shower plumber.
What Does a Leaking Shower Look Like?
A leaking shower does not always mean water is visibly pouring out of the wall. Often, the first sign appears outside the shower area. Some of the most common signs your shower is leaking include:
- Water on the bathroom floor after showering
- Damp carpet outside the bathroom
- Swollen skirting boards or door frames
- Peeling paint near the shower wall
- Mould that keeps returning in the same spot
- Cracked grout or missing silicone
- Water marks on the ceiling below the bathroom
- Musty smells near the bathroom
- Loose tiles or soft flooring around the shower
If the leak only appears while the shower is running, that usually means water is escaping during use. If dampness remains even when the shower has not been used, the issue may be more persistent, such as a pipe leak or water already trapped behind surfaces.
Is It a Plumbing Leak or a Waterproofing Leak?
This is the key question with most leaking showers.
A plumbing leak usually comes from a pipe, fitting, mixer connection, shower arm, valve or water supply line. These leaks may happen behind the wall, under the floor or near the shower fittings.
A waterproofing or surface leak happens when water escapes through failed silicone, cracked grout, loose tiles, a leaking shower screen or a failed waterproofing membrane. The plumbing may be working, but the shower area is no longer containing water properly.
From the homeowner’s side, both can look the same. You may simply see dampness, stains or water appearing outside the shower. That is why hidden or recurring leaks should be assessed properly before assuming it is just a quick reseal.
Common Reasons Water Leaks from a Shower
Failed silicone around the shower
Silicone seals around the shower base, screen, corners and edges can deteriorate over time. Once silicone cracks, lifts or separates, water can escape through gaps and move into walls, floors or nearby rooms.
This is one of the more common visible causes of shower leaks, especially in older bathrooms or showers that have been patched several times.
Cracked or missing grout
Grout helps protect the joints between tiles, but it is not designed to act as the only waterproofing layer. When grout cracks, crumbles or falls out, water can move behind the tile surface.
Cracked grout is especially concerning if it appears with mould, loose tiles, swelling, soft surfaces or dampness outside the bathroom.
Leaking shower screen or door
Water leaking under a shower screen or door is often caused by worn seals, poor door alignment, failed silicone around the frame, blocked frame drainage channels or a showerhead spraying directly at the screen gap.
This type of leak may only happen while someone is showering, which can make it easier to miss during a quick inspection.
Hidden pipe or fitting leak
A pipe leak behind the wall is more serious because the water may be escaping into a concealed area. It may come from a split pipe, loose fitting, failed connection near the mixer, shower arm issue or internal valve problem.
Warning signs include dampness on the opposite side of the shower wall, ceiling stains below the bathroom, ongoing moisture, or water damage that does not match visible screen or seal issues.
Failed waterproofing
If the waterproofing membrane under or behind the tiles has failed, water can enter areas that should be protected. This can lead to recurring dampness, mould, swelling, loose tiles and damage below or beside the shower.
Waterproofing failures usually need more than a surface repair. Simply applying new silicone or grout may not solve the underlying issue.
Can You Fix a Leaking Shower Yourself?
You can fix minor leaks, but we strongly advise checking with a local plumber if you have any doubts. What could appear to be a minor shower leak can be a serious problem below the tiles and can lead to some very expensive repairs.
At DMACK Plumbing, we treat any water showing up where it clearly shouldn’t be as a warning sign that needs to be taken seriously.
Things you can safely check include:
- Whether water is escaping under the shower screen or door
- Whether silicone is cracked, missing or lifting
- Whether grout is visibly cracked or missing
- Whether the showerhead is aimed directly at a screen gap
- Whether water appears only while the shower is running
- Whether there are damp areas outside the bathroom
If the issue is clearly a worn screen seal or an obvious external gap, the fix may be relatively straightforward. But if there is dampness outside the shower, swelling, mould, ceiling stains, musty smells, loose tiles or damage to surrounding materials, do not treat it as a simple cosmetic problem.
A visible leak can be the first sign of a hidden moisture issue.
When Should You Call a Plumber?
Call a local plumber if the source of the leak is unclear, the leak keeps coming back, or there are signs of water damage outside the shower.
You should also get help if:
- Water appears on the ceiling below the bathroom
- Carpet or flooring near the bathroom is damp
- Skirting boards, door frames or cabinetry are swelling
- The wall behind or beside the shower feels damp
- Mould keeps returning in the same area
- Tiles are loose, cracked or drummy
- Water appears even when the shower screen looks fine
- The leak may be coming from the mixer, valve or pipework
A plumber can help identify whether the issue is plumbing-related or whether another trade may be needed for waterproofing, tiling, shower screen repairs or building damage.
How Much Does It Cost to Fix a Leaking Shower?
The cost to fix a leaking shower depends on where the water is escaping from and whether the issue is limited to a visible seal or involves plumbing, tiles, waterproofing or hidden water damage.
For standard plumbing attendance in Melbourne, call-out fees are commonly around $80–$250, with standard hourly rates often around $100–$180 per hour. For shower regrouting and leak repairs in Victoria, published 2026 pricing guides place minor silicone replacement from around $150, with waterproofing membrane repairs requiring tile removal reaching $2,500+.
| Leaking shower repair | Estimated cost |
|---|---|
| Basic plumber inspection or leak assessment | $150 – $300 |
| Minor silicone repair or resealing | $150 – $400 |
| Shower screen seal or minor frame-related repair | $150 – $450 |
| Leak detection if the source is unclear | $250 – $600+ |
| Regrouting a standard shower | $300 – $800 |
| Waterproofing or membrane-related repair | $1,000 – $2,500+ |
| Major water damage repairs involving walls, floors or tiles | $2,500 – $5,000+, depending on the extent of damage |
The lower end usually applies when the leak is recent, visible and external, such as a failed silicone joint or shower screen seal. Costs rise when the leak is hidden, recurring, behind tiles, below the shower base or causing damage to plaster, timber, flooring or the ceiling below.
What Happens If You Ignore a Leaking Shower?
A leaking shower can cause more damage over time, even if the leak seems small.
Water can move into wall cavities, timber framing, flooring, plaster, cabinetry and rooms beside or below the bathroom. Over time, that can lead to mould, rot, swelling, stains, loose tiles and expensive repairs.
The longer the source is left unresolved, the harder it can be to separate the original plumbing or seal problem from the damage caused by ongoing moisture.
Related Shower Problems
A leaking shower often overlaps with other common bathroom issues.
If water is escaping near the screen or door, read:
Why Is Water Leaking Under My Shower Screen or Door?
If the visible issue is cracked silicone, missing grout or failed seals, read:
Why Is My Shower Silicone or Grout Failing?
If mould keeps returning in the same area, read:
Why Does Mould Keep Coming Back in My Shower?
If your shower is also draining slowly, read:
Why Is My Shower Drain Blocked or Draining Slowly?
Need Help with a Leaking Shower in Melbourne?
If water is leaking from your shower, Dmac Plumbing can help inspect the issue and work out whether the problem is coming from the plumbing, fittings, seals, shower screen or a hidden leak.
Whether you have damp carpet, water marks, mould, a leaking screen, cracked silicone or signs of a concealed leak, our team can help identify the likely cause and recommend the right next step.
If you have a leaking shower in Pakenham or surrounding areas, call DMACK today!
