All of this has raised another issue I have... The area I'm putting down the patio has a slight slope to it. I'd guess 4"-5" over the 10 foot area. The only way I know to deal with this is to put a small retaining wall on the low end and flatten it out using the dirt I dig up from the higher end. Is that correct, or are there more simple methods of doing this?
A small retaining wall will likely need a footing. The required footing would be bigger (deeper) than the raised retaining wall portion.
Technically the foundation should be below the frost line but truthfully if it were me I would dig a hole about twenty inches deep and fill it to the grade with reinforced concrete. Then set some concrete bricks or wall bricks on top of the footing with mortar. That could look pretty good actually. If there is only one row of bricks above grade I would use ceramic tile thinset mortar instead of brick mortar to set the wall bricks.
Then again I might just live with the slope.
[SIZE="1"][B][COLOR="Blue"][CENTER]Some days I aspire to becoming a missing person.[/CENTER][/COLOR][/B][/SIZE]