Do I Need to Remove Old Grout Before Covering Tiles with Resin?

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Do I Need to Remove Old Grout Before Resin?

If you’re considering refreshing tiled walls or surfaces with a resin finish, it’s common to wonder if the old grout needs to be completely removed. While a total replacement isn’t always necessary, ensuring grout lines are properly prepared is key to achieving the best result.

Checking and Preparing Existing Grout

Your grout lines should be stable, undamaged, and free of mould or residue prior to applying a resin coating. Inspect each grout line closely and address any loose, crumbling, or stained areas. Clean thoroughly to remove soap scum, grease, or mildew using an appropriate grout cleaner. Allow tiles and grout to dry fully before proceeding.

Repair any cracked or missing grout with new material and let it cure.
For persistent mould, treat with a specialist remover before rinsing and drying.
Smooth away dust or debris to support strong resin adhesion.

Applying Resin Over Tiled Surfaces

Once your tiles and grout are sound and spotless, you can move ahead with your resin project. Choose a product compatible with tiled surfaces and the intended location—for example, “Vertical Glass” Thick Resin Decorative Wall Coating for bathrooms or kitchens. This type of resin is typically applied with a spatula and does not self-level, letting you maintain the original pattern while creating a durable, moisture-resistant finish.

Work carefully to ensure even coverage across tiles and grout lines.
Follow the manufacturer’s instructions for application and curing times.

When Does Removing Grout Matter?

Grout removal or replacement is usually only necessary if the existing lines are compromised—such as being soft, cracked, or harbouring ingrained mould. Satisfactory, undamaged grout simply needs to be cleaned and left intact. This conserves time and effort while still offering a reliable foundation for resin coating.

Related guides

How To Cover Tiles With Resin

Taking care to prepare your grout and tiles properly helps ensure your resin surface is smooth, attractive, and long-lasting. For more expert guidance on transforming your tiles with resin, see our main guide on how to cover tiles with resin.