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How To Regrout Tiles

Our step by step guide will show you how to re-grout your existing tiles for the perfect tile makeover

How to regrout tilesHow to regrout tiles

Overtime, grout can begin to fade, gather dirt and in some cases suffer from a bad case of mould. Give your tiles the makeover they deserve by learning how to re-grout like a professional. 

Our step-by-step guide will take you through everything you need to know. Whether it’s just a little touch up here and there or replacing some broken tiles, we’ve got you covered.

This quick and easy solution will have your room looking fresher than ever and bringing those tiles back to life. Let's get started...


What you’ll need

Follow our list of essentials you’re going to need for regrouting:


Know your grout

In case you didn’t already know, we’ve put together a list of each different type of grout available. So, you can decide which one you’ll need: 


For Wet Environments - In wet environments, grout with reduced water absorption is beneficial and is classified as CG2W. 

For instance, our Mapei Ultracolor Plus is classified as CG2WA. Making it ideal for heavy duty and wet duty environments. It also contains mould inhibitors for added protection in showers and bathrooms, as well as external facades, balconies and terraces.


For Natural Stone - Although many grouts are suitable for use with ceramic tiles, other options should be considered with natural stone. Water used in the preparation of the grout may migrate into the stone through the edges, leaving a ‘picture frame’ effect visible on the surface. 


For Industrial Environments - In industrial environments or areas where hygiene is important, an epoxy resin grout will be required to offer the necessary chemical resistance. 

For example, our Mapei Kerapoxy IEG is resistant to animal fats, oils and grease. Making it an ideal grouting choice for commercial kitchens. 


For Decorative Purposes - Our Mapei Kerapoxy Design grout is highly effective for general decorative grouting purposes. This is available in a spectrum of designer shades and if you’re feeling adventurous, you can choose to enhance it with the addition of our light gold or silver glitter. 


How do you test grout performance? BS EN 13888, a standard to test the performance of grouts, categorises cement-based grouts as CG and is a useful tool in the specification. CG2 denotes improved performance and CG2A indicates high abrasion resistance.


First, remove the old grout

To apply fresh grout, you’re going to need to remove the old stuff. You can do this by using a grout rake. These handy tools help you scrape away the existing grout but be aware, you’ll have to put some effort into it. 

Fit the rake into a line of old grout, start from in the middle of a tile. Apply some pressure and draw it along the line in a slow, steady movement. Have a few to hand, so you have plenty of spares if you’re regrouting a fairly large area.

However, if you’re lucky enough to get your hands on an electric grout remover, don’t hesitate to put it to good use. It’ll be a huge time saver!

Tip: Make sure you use the blade the correct way. Drive it in the direction of its blade hooks. Once all the grout is removed, use a damp clean sponge to help get rid of any remaining debris.


Re-apply your tile grout

Once you’ve chosen the right tile grout for you, it’s time to mix it together. 

Following the instructions, stir the grout until you reach the correct consistency. Be quick! Know the drying times of your mixture. You don’t want to waste your grout. 

Use a small trowel to apply grout along the lines you wish to fill. Using a grout float or spreader depending on the area size, you can then push it onto your surface.

Place your spreader against the tile at an angle and try to sweep it across the tile surface. This will push away the excess grout from the lines and leave a neat edge. 


Seal the grout

A chalky texture may appear over the tiles. Treat this by wiping with a damp sponge. Be sure to not wipe over the areas you have applied the grout. 

Finally, if you are replacing broken or cracked tiles you’ll need to seal them. You can do this by using our Vitrex Grout & Tile Sealer


Let it dry

Look at the recommended drying time for the grout. Once dry polish with a cloth to buff out any remaining marks. 


Need more help?

Regrouting your tiles is a simple enough task that can be carried out with some careful planning and the right equipment and supplies.

If you're still unsure and need a bit more guidance, contact our Customer Service team on 0330 053 3362 or [email protected] who'll be happy to help. 

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