How do I know if hollow timber floors are from termites or just a loose board?

Loose boards typically move or flex visibly when walked on, and the sound occurs at the same specific location. Termite damage produces a hollow, papery resonance across a broader area, and the surface may have a slight depression or dimple. Professional inspection is the only reliable diagnostic.

Can termites damage a concrete slab home?

Yes — even homes built on concrete slabs can have termite entry through expansion joints, penetration gaps, and areas where timber elements contact soil. Termites can access structural wall framing, roof trusses, and flooring through these entry points.

Homeowner symptom guide · Melbourne

Hollow Sounding Timber Floors: Could It Be Termites?

Timber floors that produce a hollow, papery, or drum-like sound when walked on or tapped are a common and well-known warning sign of termite damage in Melbourne homes with subfloor construction. However, hollow-sounding timber can also result from non-termite causes — here's how to distinguish between them and what to do.

Common Causes

• Termite damage: subterranean termites consume the internal cellulose of timber, leaving only a thin shell. Tapping reveals a hollow, papery sound because the structural material has been removed from the inside.
• Failed adhesive bond (timber flooring): in engineered or solid timber strip flooring installed with adhesive, bond failure causes the floor to separate from the subfloor — producing a hollow sound when walked on but without structural damage to the timber.
• Subfloor void: in some homes, particularly older Melbourne homes with suspended timber floors, gaps between the flooring and the bearer/joist system naturally produce a hollow resonance that is not indicative of damage.
• Rot or fungal decay: repeated moisture exposure can cause timber rot that hollows out the internal structure — producing similar sounds to termite damage but through a different mechanism.

When to Be Concerned

⚠ Hollow sounds that were not previously present and have appeared or worsened over weeks/months
⚠ Soft or spongy feel when pressing on the floor surface
⚠ Visible discolouration, paint bubbling, or small holes in skirting boards near hollow areas
⚠ Any other termite indicators (mud tubes, discarded wings, frass) elsewhere in the home

What to Do

1 Do not use power tools or heavy equipment to investigate suspected termite damage — disturbance can cause the colony to relocate, making treatment harder.
2 Call a licensed pest inspector for a professional inspection including the subfloor — this is the only way to confirm termites versus adhesive failure versus rot.
3 Check the subfloor if accessible via an inspection hatch — look for mud tubes, damaged timber, or the papery texture of termite-consumed wood.

Frequently Asked Questions

How do I know if hollow timber floors are from termites or just a loose board?

Loose boards typically move or flex visibly when walked on, and the sound occurs at the same specific location. Termite damage produces a hollow, papery resonance across a broader area, and the surface may have a slight depression or dimple. Professional inspection is the only reliable diagnostic.
Can termites damage a concrete slab home?

Yes — even homes built on concrete slabs can have termite entry through expansion joints, penetration gaps, and areas where timber elements contact soil. Termites can access structural wall framing, roof trusses, and flooring through these entry points.

See how your whole home scores — free

Answer 32 plain-English questions about your home and get an instant risk score across 8 categories.

Start the free home check →