Any suggestions how I should clean black discoloration off concrete ? Is it mould ? mildew ? algae ? Thank you
Welcome to the community @Concrete1, we're pleased to have you join us and trust that you'll get loads of helpful information, advice and inspiration for all your projects around the house and garden from our amazing members.
Can I please suggest that you start by reading a few previous discussions on the site in which members shared their tips for removing stains from concrete? I hope you will get some useful tips from them:
I will hand over to community members now to share their advice.
Thanks,
Jason
