Check for hidden pipes, cables, damp and structural movement before drilling, lifting or cutting flooring
Wear suitable eye and dust protection. Stop if the floor is unstable, heavily damp, contains suspect asbestos materials or shows significant movement.
MOST LIKELY CAUSES
Start with these
Local subfloor dip
The finish follows a low area beneath.
Raised joint or fixing
A board edge or screw may sit proud.
Failed levelling compound
A previous patch may have broken down.
Movement or moisture
Swelling and deflection can change floor level.
Symptom variations Match the exact movement, noise or finish defect. ⌄
- Furniture rocks
- Small dip under flooring
- Raised ridge
- Floor covering wears locally
- Area moves under load
Quick checks Simple checks before lifting or drilling. ⌄
- Identify the flooring and subfloor type.
- Check for damp or leaks.
- Mark the exact high, low or loose area.
- Check hidden service zones.
- Choose repair materials for the substrate.
Step 1 — Identify whether it is high or low Check for hidden pipes, cables, moisture and structural movement before drilling or lifting flooring. ⌄
Use a straightedge across the affected area.
Step 2 — Check for movement or damp Check for hidden pipes, cables, moisture and structural movement before drilling or lifting flooring. ⌄
Do not level over an active fault.
Step 3 — Repair the substrate Check for hidden pipes, cables, moisture and structural movement before drilling or lifting flooring. ⌄
Use sanding, packing or suitable levelling compound as appropriate.
Common causes explained Why floor and skirting defects develop. ⌄
A small uneven patch may come from a local dip, raised joint, failed underlay, damaged screed or movement in timber flooring.
Advanced diagnostics Further checks for recurring or serious defects. ⌄
- Measure deviation over distance.
- Check joist deflection.
- Test moisture.
- Confirm compound compatibility.
- Assess whether the whole floor needs correction.
Parts and materials needed Common materials linked to this repair. ⌄
- Straightedge
- Levelling compound
- Primer
- Timber packers
- Replacement underlay
When to call a professional Conditions that should end basic DIY work. ⌄
- The floor is structurally unstable.
- There is significant damp or mould.
- Hidden services may be at risk.
- Several tiles or boards are moving.
- The defect keeps returning after repair.
Frequently asked questions Common floor and skirting questions. ⌄
Can I screw straight through a squeaking board?
Only after checking joist position and hidden pipes or cables.
Should I fill gaps under skirting with rigid filler?
Usually not. Flexible filler or trim copes better with movement.