Protecting Brick Wall From Wet Decking With no Slope All manner of questions and solutions to problems and issues surrounding the subject of brickwork, blockwork and stonework

[Iron_man]

Any advice would be appreciated please.
Decking built last year but no slope, hence rainwater can reach the brick wall. Worried about potential damp. Can I put something between decking and brick wall to protect the wall or should I be treating the wall with a product?
Thanks