May- 2025
Addendum to bonding mortar
Mortar was poorly bonded to these blocks. Some uninformed ingrate coated the blocks with a whitish bonding agent before applying the parging. Also, like a lot of parging, the mortar was too sandy and crumbly. Mortar on blocks should be so hard and well bonded it takes off part of the block when the mortar is torn off. Blocks were made for a plaster base. These watery bonding agents cause mortar to fail.
Stucco is falling off concrete in Clearwater, Florida.
Here's a link to the article from Channel 10 in Tampa Bay, Florida...
This is a result of bonding agent failure, or no bonding agent or admixture at all. This type of workmanship can be fatal.
Stucco falling off concrete is a big problem in Clearwater, Florida. This screenshot is from the same video from channel 10 news in Tampa Bay.
How we stucco on concrete: Concrete is chipped about every 4 inches or so with an electric chipping hammer. A hachet or a brick hammer works for chipping, too.
