From the ground up, the new stack-up is:
-Creek rock gravel for drainage and a stable base
-Rubberized sheet membrane thermal barrier
-Coco coir + cement insulating layer, thermal buffer
-High-strength concrete slab, gently sloped toward a center drain for easy wash-down and water management
-Concrete liquid sealer to protect and finish the slab
This configuration turns the concrete slab into a true heat capture slab instead of a heat waster. The slab becomes the main thermal mass inside the greenhouse, while the insulated layer and membrane below it slow heat loss into the earth. The result is a tougher, drier, and far more heat-efficient floor, purpose designed and built for the Bitcoin HeatHarvest greenhouse.
The images above of the cement and coco-coir “concrete burritos” are sample sections we made to test different mixtures.
Wish we could’ve finished it with tile and grout this year, it will definitely be a project for next HeatHarvest season.
