My husband and I want to build a concrete wall (and finish it with stucco) on the windy side of a concrete slab which we intend to make a patio. The wall will be 20' in length by ~5 ft tall. Have a number of questions to which we could not find answers on the web or in literature:
- do we need rebar in a 5 ft high wall?
- how do we attach the wall to the house?
- can we just start laying block on the slab or do we need to put some kind of footing in?
- the cement slab has a crack in it cause by a tree root nearby (we think), will this cause the wall to shift or crack, could we span the crack by say laying every other block on the bottom row?
- we live in central WA where the temp ranges from -20 to 106 (last week), do we need to use special mortar or do anything special because of the temp fluctuations?
- any other advice? Thanks in advance.