The concrete mix had to be just right —wet enough so that the cement would cure properly yet not so wet that the blocks would collapse when lifted from the mold.
These habitat types can be broadly categorized into: arid zone with <1,000 mm (39 in) rainfall; dry zone with 1,000–2,000 mm (39–79 in) rainfall; wet zone with >2,000 mm (79 in) rainfall.