Only very small amounts of energy are required during the manufacturing of sand-lime bricks. The two principal types of energy involved in the process are the stored energy of the raw materials and the energy needed for producing steam, almost half of which is used in preparing the lime. Sand-lime brick itself has a primary energy content of 190,6 kWh/t.

Other than the production of steam, which is used to harden the brick green body, there are no gaseous emissions involved. No waste materials are produced either, since any brick body that may become damaged along the way can be reintroduced into the manufacturing process.