How to replace paving grout?

I have two areas of paving , one top section about 8m2 and the lower about 5. I recently used Polymer paving sand on the top section. Looked good after light spray and sponging, however it rained heavily and a lot was washed out! I cleaned out all joints to start again, but I realise I need some expert advice before I use either Polymer or sand and cement.

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MitchellMc

Welcome to the Bunnings Workshop community @Bebe__. It's sensational to have you join us, and many thanks for your question about filling gaps between pavers.

How long after you applied the polymeric sand did the rain hit? If it rained too soon and the sand hadn't had time to fully cure, that would almost certainly explain why it washed out. These products really need a dry window—ideally 24 hours without rain—to set properly, so I’d definitely suggest holding off and trying again when there's a clearer forecast.

You could try a sand and cement mix instead, but it’s worth noting that this approach doesn’t have the flexibility of polymeric sand. If there’s any movement in your pavers over time, it can lead to cracking. That’s why many people still prefer polymeric sand for areas that might shift slightly with weather or foot traffic.

Please let me know if you have any questions.

Mitchell

Bebe__

Thanks Mitchell for your reply! I guess I did the pavers with sand and cement 15 years ago and only recently noticed the cracks! I guess the risk of hazing is higher with using sand and cement but as I remember it sets quicker and the residue is much harder to get off.

When I'd finished the top level the day was naturally warm and sunny. I finished about midday and about 5 it came down! So yes it was too soon!!

I don't know how to remove hazing and last time I kept damp sponging and got

it all off but with sand and cement it was definitely more labour intensive!

Do you have any trade secrets about removing residue with each product??

MitchellMc

https://www.workshop.bunnings.com.au/discussion/comment/52155#Comment_52155

No, that’s about it @Bebe__. Keeping some damp rags or sponges handy and wiping as you go is the best way to stay on top of it. Sand and cement can definitely be more stubborn, so a bit of elbow grease is often needed. If any haze does dry on, sometimes a light vinegar solution can help loosen it, but you want to be careful not to damage the paver surface, especially with more porous materials.

Mitchell

Bebe__

Thanks Mitchell you've been very helpful!

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