General guidance, not an inspection or diagnosis. Repair advice has not been independently reviewed by a tradesperson. How these guides are prepared.
What to do now
Avoid heavily loading a visibly failing area. If the floor is rapidly collapsing or unsafe to walk on, keep clear and arrange urgent assessment.
Common causes
- Rot or moisture damage
- Termite damage
- Failed joist / bearer / support
- Foundation or stump movement
The exact cause cannot be confirmed from a symptom alone. The first professional should inspect before repair work is authorised.
What the professional may do next
- Inspect subfloor where safely accessible
- Check for moisture / termite evidence
- Assess structural members
- Repair cause and then damaged floor
What should I ask about the price?
Ask for an itemised quote covering the inspection or call-out fee, labour, materials, GST, access, disposal and any after-hours charge. Ask what happens if extra damage is found. A reliable price needs details of the actual job; this guide does not provide an estimate.
Who may be responsible?
Owner / landlord
Structural floor defects usually sit with the property owner. Tenants should report them promptly rather than attempting repairs.
Tenancy, strata, insurance and boundary responsibilities vary by circumstance and state, so confirm responsibility before non-emergency work where practical.
Questions to ask before hiring
- Are you appropriately licensed or registered for this work in my state?
- Does the quote include call-out, labour, parts/materials, GST and disposal?
- What is excluded from the quoted scope?
- If you find additional damage, will you get approval before doing extra work?
- What workmanship or product warranty applies?
Keep weight away from the soft area
Describe the affected room, visible movement and any dampness without walking on the area to test it. Do not lift flooring or crawl underneath. A floor that feels soft needs assessment before ordinary use or repair assumptions.
Ask which specialist is needed
Explain whether the issue is localised or widespread. A building assessment may identify a need for structural, carpentry, moisture or pest investigation. Ask whether the proposed work addresses the cause as well as replacing damaged finishes.
Sources and review status
Prepared for Home Triage Australia. Updated 6 November 2026. Not independently reviewed by a qualified tradesperson. This source supports general principles; it is not an assessment of your property.
Run this problem through the checker, then contact a suitable professional of your choice.
Run floor feels soft or sinking triage →