What mould treatment for Travertine pavers?

geoffr

We've recently had laid travertine pavers in a courtyard that I plan to seal (as soon as I finish filling all the holes with mortar to prevent water seeping through them). In the meantime, with all the rain, some pavers are getting patches of back mould. I've heard travertine is quite porous and harsh chemicals and scourers should be avoided. What product / procedure can you recommend to clean the pavers prior to sealing them?

Also, I've left a thin residue of the dry mortar over some pavers -- best way to remove that?

Thanks,

Geoff

JacobZ

Hi @geoffr, 

You're absolutely right to be cautious, travertine is a beautiful but porous stone that needs gentle care, especially before sealing.

Harsh acidic cleaners should be avoided, but this 30 Seconds Outdoor Cleaner Concentrate shouldn't cause any harm. It is a bleach-based cleaner that will neutralise the mould effectively. Give the mould a clean with this, then follow up with a pressure washer with the nozzle held a good distance away from your pavers.

This same procedure should do the trick removing the mortar as well.

Let me know how you go and if you require further assistance, don't hesitate to reach out.

Jacob