I recently had bark chippings standing on a brick drive. when removed the area underneath the chippings had been cleaned by a reaction with the chippings. How do I clean the rest of the drive
I use ALGON to clean my brick drive. Available from garden centres, etc, for under a fiver (depending on the size of your drive of course) and you just dilute it in a watering can and water it on, no scrubbing required. It really works.