Some foundation questions.

[Stain]

1. What is the acceptable out of plumb limit for a block wall?
2. Is mortar acceptable for leveling out a block wall if the concrete foundation slopes downward?

 

[ddawg16]

That is a good question.....and considering the responses....or lack there of....I think the rest of us are waiting for someone to chime in....

First, you have to take into account how far of a distance....if you were off 1" in 10'....that would be a lot....but 1" in 100' is not much....

For a comparison...I just built a 20'x25' garage....I'm off about 1/4" from one end to the other....considering how much wood can move, that is not much....but you do see the difference where the corner floor joist sets next to the wall cap....Once I dry wall, the small gap won't show....

So, I would say, anything less than 1/4" per 10' is liveable....

And, yes, you can use motor and cinder block to level things up....run a plumb line on each layer and bump up the low side a bit at a time....

Simple math...say you are off 2"....and your using 8" high blocks...if you adjust each row 1/8" at a time......it will take 16 rows to get plumb....which will put you up a little over 10'.

 

[Identaltech]

I'm with Ddawg 16
as for plumb I would rather have the wall lean back than in.
if I put a 6 foot level on it and the bubble is in the line I would say it looked good from my house. any more than that I would worry

 

[FunfDreisig]

1. What is the acceptable out of plumb limit for a block wall?
2. Is mortar acceptable for leveling out a block wall if the concrete foundation slopes downward?

I don't know the answers to your questions. But here is what I did....

Despite my best efforts to monitor the placement of my 25x42 ft slab, the left rear corner ended up nearly 3/4" higher than the rest of the slab. And, of course, the back of my garage and part of two sides needed a 4ft high block stem wall I took up the whole 3/4" elevation error (over 42'along the back and 15 feet along one side) in the first course of blocks by thickening the mortar bed from 1/4" at one end to 1" and the other. FWIW EVERY core was filled with cement w/ a 4ft stick of 1/2" rebar in the center. Every other stick of rebar is tied to a 6" high 1/2" rebar stub set in the slab. The result is that I can slowly spin a 5 point laser on a god tripod and have the perpendicular lasers just touch the top of every block

Funf Dreisig