Anti-Termite Treatment for New Construction: Step-by-Step Guide

The best time to protect a building from termites is before it is finished. Pre-construction anti-termite treatment places a chemical barrier in the soil and around the foundation, where subterranean termites would otherwise enter. Done well, it protects the building for years. Done badly, it leaves hidden gaps that are expensive to fix later.

This guide walks through the stages and the points owners should verify.

The short answer

Pre-construction anti-termite treatment is carried out at several stages of building: treating the soil in the excavated foundation and trenches, the plinth and backfill, the soil under floors, and the perimeter and junctions around the building, using an approved termiticide applied at specified rates. Indian Standard IS 6313 covers anti-termite measures in buildings. Owners should check that treatment is done at each stage, with records, and that the provider issues a certificate and warranty.

Stages of treatment

1. Site preparation: Remove tree roots, stumps and wood debris from the site and foundation area.
2. Foundation trenches and pits: Treat the bottom and sides of excavations before concrete is laid.
3. Plinth and backfill: Treat the soil that backfills around the foundation and plinth beams.
4. Soil under floors: Treat the area below the floor slab before it is cast.
5. Junctions and service entries: Treat where walls meet floors and around pipe and conduit entries.
6. Perimeter: Treat soil around the outer edge of the building after construction, where applicable.

What to verify

• The treatment is done by a licensed provider, at the right stage, before concrete is poured.
• The chemical and its concentration are stated and appropriate.
• Quantities and coverage are recorded for each stage.
• Photos or site records are kept.
• A treatment certificate and warranty are issued.
• The treated soil barrier is not disturbed by later work.

Common mistakes

1. Treating after the slab is poured.
2. Skipping stages to save time.
3. Diluting the chemical too far.
4. Leaving timber, formwork and wood waste buried in the soil.
5. Failing to treat around pipes and service entries.
6. Disturbing the barrier with later digging or landscaping.

Beyond soil treatment

Use treated or termite-resistant timber where possible, keep soil levels below the damp-proof course, ensure good drainage and avoid wood-to-soil contact. Seal expansion joints and service gaps.

After completion

Keep the certificate safely. Inspect the home periodically for mud tubes and damage, especially in the first few years, and consider periodic inspections from a professional.

When to call a professional

Hire a licensed anti-termite contractor early, before foundation work begins. Ask them to explain each stage, the chemical, the coverage and the warranty terms.

Frequently asked questions

Is pre-construction treatment enough forever?

No. Barriers can degrade or be disturbed, and no treatment lasts forever. Regular inspection remains important.

Can I treat after the building is complete?

Yes, through post-construction methods such as drilling and injecting, but pre-construction treatment is generally easier and more thorough.

Who should pay for it?

This is usually part of the construction cost. Confirm in the contract.

What certificate should I get?

A treatment certificate with dates, chemical, area and warranty terms.

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