Due to time and lack of gutters(22 years), the swing in garage needs lifting. The wall farthest from the house is down about 2 inches. This doesn't affect the main structure. The structural engineer will be coming by to confirm the plan of 8 piers. One every 6 feet along the two exterior walls. The walls connected to the main structure and the garage door are not affected yet.

Due to the same issues the driveway also needs lifting. Two separate companies will be doing the work.

While discussing the polylift(foam) driveway repair I mentioned the garage would be getting repaired. The rep brought up that due to the foundation lift there would be a sizeable void under the garage. The garage is 27x25 IIRC. His suggestion is to have that void filled with foam after the foundation work has been completed. He also commented that it would not be a big additional expense.

My thoughts are: would there be a warranty issue with the foundation work? Is this a belt and suspenders approach that is a good use of money? I'll ask the engineer next week. But would like to know if there is anything else to consider.

Thanks in advance.
-TVz

You need to discuss warranty with those providing the warranty.

Can't say as to the warranty, however we have used both the foam and gunite type methods to lift a couple of sections of sagging pool deck.

Both have held up well, the foam is of course lighter and filled the area easy, we've had no issues with the areas that were repaired.

The foam is used to life driveways, decks, all kinds of surfaces, if anything it should fix the void areas and better secure the floor.

You guys have that brown dirt up there like we do in Temple? I see huge cracks in the dirt around here as the summer wanes on, creating gaps. A man who watched our dog keeps his sprinklers on around the house just to keep the foundation slab from cracking or sagging.

I would think having a void under the garage slab after the foundation repair would cause problems in the slab.

A couple of other questions.
Does the slab have anything tying it to the foundation or is there an expansion joint between them?
Also, is the soil under the slab also slowly compacting allowing the slab to settle along with the foundation?

Surprised if the foundation repair contractor wouldn't mention that.

I agree with 220-9er. If there's a void under the slab, the slab will be sinking along with the foundation. Not saying there's not a void but it's odd that the slab isn't moving if the foundation is.

I've put a pier under our old home between the 2 garage doors. And it was holding up a bedroom over the garage. It was 1 pier so it seems odd to me that you need 8.

No indication of an existing void. The void would be a result of lifting the garage foundation. Filling it with foam is supposed to support the garage floor since it carries a heavy load as the suv goes in and out.

Thanks for the responses.
-TVz