Fixing Leaks to Stop Ant Trails: A Plumbing and Sealing Checklist

Many ant problems are really water problems. A slow leak under the sink, a damp wall or a dripping tap gives ants moisture, shelter and a reason to stay, and the pipes and cracks provide the routes they use. Fixing the plumbing and sealing the gaps can do more than any spray.

This checklist shows what to look for. Plumbing and electrical repairs should be done by qualified people.

The short answer

Ants follow water, so find and repair leaks and damp, keep sinks, bathrooms and balconies dry, clean drains, and seal the gaps around pipes, tiles, windows, doors and skirting that ants use as routes. Work through the kitchen, bathrooms, balcony and exterior systematically, using a torch, checking with a dry tissue for dampness, and fixing the cause rather than just wiping away trails. Combine with bait for existing colonies and keep food sealed. A dry, sealed home is far less attractive to ants.

Kitchen checklist

1. Look under the sink for drips, damp, stains and soft cabinet bases.
2. Check supply and waste pipe joints and the trap.
3. Run water and look for leaks at the tap, basin and drain.
4. Check the dishwasher, washing machine and water purifier connections.
5. Look for damp behind the fridge, especially if it has a water line.
6. Check the gap around pipes where they pass through walls and floors.
7. Wipe the sink dry at night.

Bathroom checklist

1. Check taps, shower heads, cisterns and flush mechanisms for drips.
2. Inspect pipe joints, the toilet base and the basin.
3. Look at tile joints and grout for cracks and damp.
4. Check the floor drain and the gaps around it.
5. Ventilate and wipe wet surfaces.
6. Check walls shared with the kitchen or neighbouring flats for damp patches.

Balcony and utility area

• Clear balcony drains and gutters.
• Check for puddles and water collecting near doors and plants.
• Check AC drain pipes and cooler trays.
• Look at washing machine hoses and taps.

Walls, ceilings and structure

• Look for damp patches, peeling paint and stains on walls and ceilings.
• Check below bathrooms and kitchens in multi-storey buildings for seepage.
• Inspect window frames, sills and external walls for rain ingress.

Sealing checklist

1. Gaps around pipes and cables where they pass through walls and floors.
2. Cracks in walls, skirting and the floor-wall joint.
3. Gaps around window and door frames.
4. Tile and grout joints in wet areas.
5. Gaps around sockets and switchboards, with an electrician's guidance.
6. AC pipe holes.

Use suitable sealants and fillers. Seal after ants have been treated, so they are not trapped inside.

Repairs

• Call a plumber for leaks and damaged pipes.
• Call a mason or contractor for waterproofing and seepage.
• Let damp areas dry fully before sealing and painting.

Keep it dry

• Wipe sinks, counters and floors after use.
• Do not leave wet cloths or sponges in cupboards.
• Empty plant saucers and pet bowls at night.
• Ventilate bathrooms and kitchens.

Combine with ant control

• Use bait on active trails.
• Remove food sources and store food sealed.
• Avoid heavy spraying.

When to call a professional

If ants persist after the leaks are fixed, call a pest controller to find the nest. For seepage and hidden leaks, involve a plumber or waterproofing expert.

Frequently asked questions

Do ants really follow leaks?

Yes. Moisture is a strong attractant, particularly in dry weather.

Will sealing alone stop ants?

It helps, but treat existing colonies with bait.

How do I find a hidden leak?

Look for damp, stains and musty smells. A plumber can help.

When should I seal cracks?

After the ants have been dealt with.

This guide is part of IPest's complete resource on ant control. For identification help, prevention and treatment options, see our full ant control guide for Bangalore.