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FLOORS & SKIRTING

Gap Between Skirting and Floor

Gaps beneath skirting may be caused by uneven floors, shrinkage, poor fitting or replacement flooring with a different thickness.

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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

Uneven floor The skirting runs straight while the floor rises and falls.
Flooring thickness changed New flooring may sit lower than the previous finish.
Shrinkage or movement Timber and flooring can move over time.
Poor original fitting The skirting may have been fixed too high.
◫ Symptom variations Match the exact movement, noise or finish defect. ⌄
  • Small uniform gap
  • Large gap in one section
  • Draught from edge
  • Gap after floor replacement
  • Skirting loose as well
✓ Quick checks Simple checks before lifting or drilling. ⌄
  1. Identify the flooring and subfloor type.
  2. Check for damp or leaks.
  3. Mark the exact high, low or loose area.
  4. Check hidden service zones.
  5. Choose repair materials for the substrate.
1 Step 1 — Measure the gap Check for hidden pipes, cables, moisture and structural movement before drilling or lifting flooring. ⌄

Check whether it is consistent or caused by a local floor dip.

2 Step 2 — Choose the right finish Check for hidden pipes, cables, moisture and structural movement before drilling or lifting flooring. ⌄

Use flexible filler for small gaps or trim for larger ones.

3 Step 3 — Refit if necessary Check for hidden pipes, cables, moisture and structural movement before drilling or lifting flooring. ⌄

Remove and lower the skirting where the gap is too large to hide neatly.

⌁ Common causes explained Why floor and skirting defects develop. ⌄

Gaps beneath skirting may be caused by uneven floors, shrinkage, poor fitting or replacement flooring with a different thickness.

⌘ Advanced diagnostics Further checks for recurring or serious defects. ⌄
  • Check floor level.
  • Inspect for subfloor movement.
  • Use scribed skirting where needed.
  • Avoid rigid filler across moving joints.
  • Seal draught paths separately.
▣ Parts and materials needed Common materials linked to this repair. ⌄
  • Decorators caulk
  • Flexible sealant
  • Scotia or trim
  • Fixings
  • Touch-up paint
! 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.