Never heard of spray foam injected into block cells though I'm sure many try it. Blocks have too much thermal bridging to get much use out of filling cells with any insulation, same is true for moisture transport. The exterior face of block wall is the best location for spray foam application, followed by other redundant water drainage practices if the block is to be backfilled.

Springtime Builders assumed you filled the cells or cores of the block with spray foam is this what was done? Also do you know if the foam was open cell or closed cell type?

Sounds like there is a dampness issue somewhere, are the blocks part of a foundation that is buried on the outside? Are the blocks painted, or sealed in any manner? A lot of questions before any definitive answers can be given.

Used to be able to purchase blocks with foam inserts pre-installed in each cell, it was discovered that as the prior posted mentioned there is way to much bridging to be effective.

I would be afraid that the expanding foam could crack a block. But if that's what they did maybe the foam is forcing ground water out of the block?

Installing spray foam insulation in the cores of concrete masonry units provides some insulation, but it doesn't waterproof the block--irrespective of whether the insulation is open cell or closed cell. The webs can still transfer moisture in the same way they act as thermal bridges transferring heat.

Waterproofing of a foundation wall is best done on the exterior side. In addition, be sure to install gutters and downspouts or a near-grade system for directing rain water away from the foundation.

Thanks for your responses. This is a home in Florida. The block is the walls of the home ( no basements in Fla) This injection spray foam is done to fill up gaps in the cinder block to increase insulation and seal up the home. What my husband and I have noticed is small areas of dampness on the interior and exterior surfaces of the cinder block and it must be coming from the insulation. Wondering if anyone has any experience in this happening to their homes/ jobs and what to do about it. Our gut feeling is that the foam mixture was not mixed properly not allowing the foam to harden.

I'm in Fl and our block is being filled with cement.

Not every cell...only around windows , doors and some areas in between.

That sounds less wasteful. Do the spots smell fishy, stinky or like chemicals?

Was the rest of your block filled with cement?

Thanks for your responses...no fishy smell, wet stains still there as of yesterday. My husband has decided to just proceed with the job. Wish us luck that there wont be any issues down the line. thanks

We had our 3000 sf shop building block walls insulated with spray-in-the-core material and I would not recommend it. There were mold problems occurred inside from the foaming operation and the thermal results were almost unnoticeable, probably due to the bridging of the block from outside to inside. In hindsight, rigid insulation outside with metal siding on top would likely have been worth the extra cost.