How we make earth mortar


 
We've just started another natural building project using home-made clay lump blocks. Here's a short video showing how we make earth mortar .

First, we mashed up old clay lump blocks with a giant tamper, then ran the earth dust through a garden sieve. The stones were 'harvested' for another project. Earth dust was stirred 50/50 into a swidgy clay mix. Depending on how dry/wet the materials are we added more rainwater (harvested from our oak shingle roof in 500L IBC tanks).

A sloppy mix works well with the dry clay lump blocks as they absorb moisture quickly from the earth mortar.


The photo shows Gerry, Mel, Sue and Katy. Gerry told us a wonderful tale about making clay lump in Ireland in the early 60s. Fifty five years later the process is the same!
The benefits of using earth mortar are:-
  • Free 'waste' material
  • Easy to use
  • No special tools or skills needed
  • Recyclable
  • After use will return to the earth
  • Non-polluting
  How to make earth mortar