Our 5 Top Tips When Repairing Leaking Bathrooms

Have you discovered leaks around your bath or shower? It’s worth replacing your sealant to ensure you can prevent any further leaks and more damage from occurring. Here are our top tips for repairing leaking bathrooms.

1. Remove The Existing Sealant

Don’t be tempted to do ‘half a job’ when trying to repair leaking bathrooms. It’s important to start from scratch again and remove all the existing mastic around the bath or shower, including corner walls. You should never join old mastic to new mastic, as this won’t solve your problem or prevent leaking. This is because the adhesion of the existing sealant to the bath or shower is what counts, so no matter how much new sealant you apply on top, the leaking may still occur so it’s best to start from scratch for peace of mind.

Removing old mastic successfully can be tricky depending on what your tile surface is, for example a glazed tile with be easier to remove then a textured matt tile.

2. Ensure Grout Lines Have No Cracks

Ensure your grout lines have no cracks and that grout goes right to the bottom of the tile where it meets the bath. Cracks will allow water in and therefore lead to leaks. If there are cracks, remove the grout from the affected area and replace. Cracks can occur when because of age, inconsistent grout mix, or settlement in the structure.

3. Watch Out For Movement

It is important to ensure your bath or shower tray has zero movement when standing in it, there should be no resistance on new mastic due to movement as this will create gaps to allow leaks, and reduce the life of the mastic.

To fix this issue, you need to fix it at the source and ensure your bath or shower tray has adequate support, so it does not move. This could mean adding timber support underneath, or simply retightening the legs underneath.

4. Apply Mastic Behind The Shower Screen

Another misconception is applying mastic inside the shower screen rather that outside. Mastic should be on the outer side of the shower screen or shower frame where it meets the tray/bath. This is because any water that enters the metal channels needs to be able to escape at the bottom into the shower tray.

5. Don’t Apply Sealant Inside The Shower Screen

If sealing a shower cubical, make sure you have no sealant on the inside of the shower where it sits on the tray. Sealant should only be on the outside as sealant on the inside will block any water from escaping. If you seal inside, water will escape outside and if you seal both sides, water will build up inside and sit there.

Bonus Tip: Call A Mastic Man

Our best tip for repairing leaking bathrooms and preventing leaks occurring is hiring a professional mastic man. We can supply you with a mastic man Chelmsford and throughout Essex. We have rectified tens of thousands of baths and showers and use high quality premium sealants which is expertly prepped and applied to prevent leaks. It’s not where you mastic, its where not to mastic. To find out more or to speak to a member of the team, please call us on 01268 330054.

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