Drainage Against a House Wall: Gravel, Channel and French Drains
Every question I get about drainage at the base of a house wall comes down to the same job: get water away from the brickwork and stop the ground holding it wet. Gravel margins, channel drains and French drains aren't three unrelated products; they're three ways of doing that same job on different sites.
I've written before about why paving shouldn't sit hard against a wall, about getting the finished level right, and about the breathing room an air brick needs. This is the piece underneath all of that: what actually goes in the gap once paving can't simply run up to the house.
After decades designing gardens across Kent and East Sussex, this is the detail I see skipped, or done wrong, more often than any other part of a garden near a house. Below, I'll cover the three tools I use, their honest weaknesses, the question almost nobody asks, why Kent clay makes this harder, and the maintenance that decides whether any of it still works.











































































































