Take the tour ×  I want to build a concrete slab (upon which a
deck will be build later) at the foot of a brick wall (by foot I
don't mean the foundation foot, I just mean where the brick
meets the grade level). I hear that you can't make concrete and
brick stick together. How do I deal with it? Do I leave a gap?
What about water in that gap? Do I put some flashing?  Edit:
There are also some practices about joints:   This means have a
joint but seal it, basically. What do you think?  Note that I'll
have a slight slope from the wall. I'm still puzzled what to do.
share|improve this question add comment  2 Answers  up vote 4
down vote accepted  You can leave a gap of a about 3-4 inches
(70-100 mm).  Fill the gap with gravel - you can go from coarse
to fine as you go. This will ensure that there is a route for
any water to drain away. If there is a lot of water you may want
to go as far as installing a French Drain which has a pipe for
removing the water rather than relying on percolation.  Another
route is to