An architect specified another insulated block and NRG block as an alternate on a project with 75,000 sq ft of wall.
The other insulated block (top left and top right pictures) would deliver over 150,000 thermal bridges (two bridges per block) on the project.
NRG (bottom left and bottom right pictures) on the same project would deliver zero thermal bridges.
That's an enormous difference.
The problem? When masons bid on two alternate materials, they just bid the lowest price material, not the most valuable.
In this case, the mason bid the other block, which was about a dollar less than NRG.
Yet, NRG would provide more payback to the building owner over the life of the building.
Question: Did the owner know this?
The end result? 150,000 spots where money and energy are wasted, instead of zero.
The owner loses, and the environment loses, for the life of the building.
Solution: Architects and engineers can educate owners and developers.
Protect the NRG spec with the words: "continuously insulated concrete block with zero thermal bridges".