Your downstairs neighbour is complaining about water marks on their ceiling. Your builder says the only solution is to demolish your entire bathroom, re-do the waterproofing, and re-tile everything. That means ₹50,000-₹80,000, 2-3 weeks of disruption, and a bathroom that never quite matches the original tiles.
Here's the good news: in most cases, you don't need to break a single tile.
The Modern Solution: Injection Grouting
Injection grouting (also called chemical grouting) is a non-destructive waterproofing technique that seals bathroom leaks from above — without demolishing tiles, hacking walls, or creating weeks of dust and mess.
How It Works
The process involves drilling tiny 6mm holes at specific points in your bathroom floor and walls (typically along joints and suspected leak paths). Then specialised epoxy or polyurethane grout is injected under controlled pressure through these holes. The grout flows into the cracks, voids, and gaps in the waterproof membrane below the tiles. Once cured, it creates a continuous waterproof barrier. The drill holes are sealed with colour-matched grout, becoming nearly invisible.
Cost Comparison
| Method | Cost | Duration | Disruption |
|---|---|---|---|
| Full demolition + re-tiling | ₹50,000–₹80,000 | 2-3 weeks | Very high |
| Injection grouting | ₹8,000–₹25,000 | 4-6 hours | Minimal |
That's a 60-70% cost saving and 95% less disruption to your daily life.
When Does It Work?
Injection grouting works perfectly for leaks between tiles and joints, seepage through floor-wall junctions, water marks on the ceiling below your bathroom, dampness on shared walls, and most residential bathroom leak scenarios in apartments.
When It Doesn't Work
In rare cases, if the original waterproofing membrane has completely disintegrated, or if there are large structural cracks, full renovation may still be needed. A good contractor will honestly tell you during inspection.
Warranty
At LoklFix, all injection grouting work comes with a 5-year written warranty. If any leak recurs within the warranty period, we fix it at zero cost.
Book a Free Inspection
Not sure if injection grouting will work for your bathroom? Call us for a free inspection. We'll diagnose the problem and give you an honest recommendation — even if that means telling you injection grouting isn't the right solution for your case.