Will this work?

[Ol'WhiteCap]

The house that we purchased a year ago has a concrete pad on the side of the house. I'm guessing it was professionally done, from the finish and the saw cuts.
The concrete against the house is fine. But the slabs on the outside of the cut have moved about an inch or a little more.
My question is: can I cut holes in the slabs, fill with concrete, and stop the movement so that I can build a pergolas or car port type structure or will I need to remove and replace the concrete? I'm thinking of attaching it to the house.
A previous owner tried filling the gap with something that looks like concrete. But it didn't last a year before it broke up and is in need to be re done with a different crack filler.

 

[oldironfarmer]

The house that we purchased a year ago has a concrete pad on the side of the house. I'm guessing it was professionally done, from the finish and the saw cuts.
The concrete against the house is fine. But the slabs on the outside of the cut have moved about an inch or a little more.
My question is: can I cut holes in the slabs, fill with concrete, and stop the movement so that I can build a pergolas or car port type structure or will I need to remove and replace the concrete? I'm thinking of attaching it to the house.
A previous owner tried filling the gap with something that looks like concrete. But it didn't last a year before it broke up and is in need to be re done with a different crack filler.

Pictures would be nice!

Concrete does not move unless there is something wrong underneath. Usually the fix is not easy, but some pictures of the installation and surrounds might help folks here give you an idea of what might be possible. Likely the concrete is not only moving but also rotating. A string line all the way across can give you an indication.

 

[Bib Overalls]

If large sections of the slab have broken on the saw cuts and moved I would suspect inadequate compaction of the base material under the slab. Freeze and thaw could also be responsible.

If you decide to build your pergola or car port type structure do not tie it to the slab. Instead, build on footings below the frost line.

 

[PelicanPines]

If large sections of the slab have broken on the saw cuts and moved I would suspect inadequate compaction of the base material under the slab. Freeze and thaw could also be responsible.

If you decide to build your pergola or car port type structure do not tie it to the slab. Instead, build on footings below the frost line.

^^^ --- exactly that... Build independent to the slab, it is not a suitable foundation for a structure based on your description.

You can still have the slab as the floor...

 

[Ol'WhiteCap]

Oldironfarmer, I'll post a picture next week when I get home from a family ski trip.
I failed to mention, the slab is on what I believe is the dirt from digging the basement.
The only saving maybe that there is additional cement work on the outside slope to help hold it in place.

 

[wasfast]

How big is the slab (width x length)? Given the "fixes" that have been done, the likely hood that the dirt underneath wasn't compacted properly, I'd be inclined to just bust it up and start fresh. What use are you wanting for the slab?

 

[Ol'WhiteCap]

Thanks for all of the replys.
The slab is about 14' x 60' with saw cuts about every 10'. I'm wanting the pergola for shade. Eventually putting a roof on it be a carport for a motorhome.
I haven't seen any movement sense I purchased the place and the previous owner "claims" that it didn't move the previous 8 years.
The biggest issue is, im cheap, and not wanting to spend more than I have to. As I'm not planning to stay here more than 5 years. ( the last 5 year house, I lived in for 24 years)