Can foam sealer be used to seal the spaces in concrete block?
I have an old, small 800 sq ft concrete block home on 4 acres in the Tampa Bay area. It used to be the caretaker's home for a chicken farm on the property. Planning to live in it for a few years until we build a new home.
It is constructed from plain hollow block, no drywall, and there is no insulation in the cavities in the block. One westward-facing wall in particular gets a lot of sun and heat in the afternoon, and I considered having insulation installed in the block. Companies want $800-$1,000 and I hate to spend that much on a temporary home.
So, I was wondering if I could use canned foam insulation like Great Stuff to apply in each hollow wall cavity to provide better insulation at least on that one wall. I could drill small holes in the top and bottom of each vertical wall cavity line, squirt it at the bottom and allow any over-expansion to come out the top hole.
I've looked around and can't find any information on using this type of canned foam as insulation as opposed to something that just seals space. Not sure if this type of use would be appropriate and if the resulting insulative value would be worth the effort.
Any advice or information would be appreciated.