How to Replace Moldy Grout

When grout becomes discolored, cracked and chipped, it’s time to replace it. To grout it yourself, follow these step-by-step instructions.

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Photo By: Lee Rogers / iStock

Sick of Moldy Grout?

Here’s what you need to fix it: 1. Grout saw 2. Vacuum or soft brush 3. Abrasive cleaner 4. Rags 5. Grout (non-sanded for joints smaller than 1/8-inch, sanded for 1/8 or bigger) 6. Float 7. Citrus-based cleaner 8 Grout Sealer

 

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Photo: Konstik / istock

Saw Out the Mold

Working in one 2-by-2-foot area at a time, run the saw up and down the grout line.

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Photo: Yunava1 / iStock

Vacuum Loose Residue

Vacuum out flaked residue, or use a soft brush to remove the grout pieces.

 

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Photo: FotoDuets / iStock

Clean Grout Joints

Put some abrasive cleaner on a wet rag and rub the joint to remove any remaining residue.

 

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Photo: John Loo via Flickr Creative Commons 2.0

Mix the Grout

Carefully follow the directions regarding the proportions of water and dry ingredients because grout won’t last if it’s too wet when mixed.

 

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