Lime can be considered a sustainable alternative to concrete. Lime is a little softer and more flexible than concrete. It is a strong and durable material which also has antimicrobial properties. Lime mortar is inherently fire-resistant and has the capacity to absorb and release moisture.

Lime requires less energy to produce than cement. Moreover, lime mortar is a carbon sink which means that it absorbs CO2 from the atmosphere as it hardens and sets. However, it requires some precaution to work with: make sure to wear gloves and glasses, and work in a well ventilated space to protect your respiratory system and eyes.

Lime is not renewable. Nevertheless, limestone is yet an abundant material. Besides, lime also has the potential to be recycled or reused.