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—Renovation and tiling

Replacing pool coping

Loose coping is a trip hazard and lets water behind the pool wall. Re-laying or replacing it restores a safe, sealed edge.

Coping stones are bedded on mortar along the top of the pool wall. Heat cycles, ground movement and missing movement joints can loosen or crack them, and water can then reach the bond beam and the back of the tiles. Rocking stones, open joints and cracked pieces are the usual signs.

Renovation guides cover work on a pool that already exists: its surface, its waterproofing and sometimes its structure.

If the stones are sound, they can be lifted, cleaned and re-laid on new bedding with proper joints. If they are cracked, worn or dated, new coping is fitted. Because the coping meets the waterline tiles and the deck, replacing it can involve adjusting both. Movement joints between coping and deck let the materials expand without cracking.

01Summary

What matters most here

  • Re-lay if sound

    Lift, clean and rebed good stones.

  • Replace if damaged

    Cracked or worn stones renewed.

  • Include movement joints

    To prevent future cracking.

02Detail

What the work involves

  • Lifting

    Stones removed carefully to avoid damaging tiles below.

  • Bedding

    New mortar bed suited to outdoor and pool use.

  • Joints

    Sealed joints and movement joints at intervals.

  • Interfaces

    Waterline tiles and deck edges made good.

  • Materials

    Matching existing stone or choosing a new coping.

03Before you start

Before work

  • Mark loose stones

    And keep people off them.

  • Decide re-lay or replace

    Based on condition.

  • Check the waterline tiles

    They may need attention too.

—In practice

How to use this

Check whether the existing stones are sound enough to lift, clean and re-lay, or need replacing. Ask how they will be bedded, how movement joints will be included, and how the joint between coping and tiles will be sealed against water. If replacing, test samples in the sun on site for heat underfoot and for slip when wet.

Mistakes worth avoiding

Re-laying without movement joints
Coping laid again without allowance for heat movement will crack and loosen in the same way as before.
Ignoring water getting behind
Open joints let water reach the bond beam and the back of the tiles. Sealing that joint is part of the job.

04FAQ

Common questions about this

Why does coping come loose?
Failed bedding, heat movement and missing joints are common causes.
Can I reuse my coping?
If the stones are sound, re-laying them is often possible.
Does the pool need draining?
Usually lowered a little, so the top of the wall is dry.
Can coping be changed to a cooler material?
Yes, replacement is a chance to choose a heat-reflective stone.

05Read next

More pool guides on this

Filed under pool renovation & tile replacement. Every pool guide is listed on the pool guides page.

—NEXT

Coping coming loose?

Send photos of the edge. We will suggest re-laying or replacement.

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