I need to pour a small (~5' x ~5') concrete pad that will butt up against 2 basement block walls (A&B in the diagram) and my asphalt driveway (D in the diagram). I'm having some trouble figuring out how to frame it correctly as I need it to slope toward a trench drain I will be installing as well.
- From my understanding, there needs to be an expansion joint between the newly poured pad and the existing block wall. Would using something like this https://www.homedepot.com/p/SAKRETE-50-ft-Foam-Expansion-Joint-70450004/100674358 be sufficient as screeding surface to get the slope right and an expansion joint?
- What should I use to frame side D as it's not a straight line and actually has a gradual angle? Would 1x lumber or plywood be flexible enough or is there something else that I could use?
- Once the pad is poured, should I insert the expansion joint material between the pad and asphalt (D) or would some concrete caulk be sufficient?