Shower leak solutions
Q: My home has a leaking shower. How can I fix it?
About 95 per cent of all shower waterproofing problems involve a leaking shower base or leaking through the shower hob.
They can be very annoying and time-consuming to fix. You will first need to check the condition of the tiles.
Are any of the tiles drummy or cracked? What is the condition of the tile grout and/or sealant?
Next, examine if the shower, shower screen or adjacent plumbing or drainage system is leaking.
The shower screen may not be properly installed and sealed.
All plumbing fittings should be checked and plumbing pressure tests may be necessary.
Also check roof drainage connections for signs of leaks, particularly after heavy rain.
A damaged or incomplete shower tray may be the problem if the shower is in an older home.
This can be tested by plugging the waste drain, filling the shower with water up to 25mm from top of hob or 10mm from top of step down.
Check for leaks over a 12-hour period.
If the shower tray has failed, the entire shower base and bottom wall tiles may need to be removed, checked, waterproofed and retiled.
Another thought is that the leak could be coming from the top of the hob if the seal between the screen and tray is incomplete.
The shower screen and tiles on top of the hob should be removed and leaks checked.
If your shower is all tile on a concrete base with a waterproof membrane on the walls, a re-grouting job at various joints may be all that is necessary.
Some tiles may need to be removed and the shower resealed with waterproof membrane and retiled.
Remember to make sure that you have enough tiles to do this task before you start.
Leaking shower bases or hobs are the culprits in most cases of waterproofing problems.