I’ve seen some photos lately of structures with ‘thin bags’ where the earthbags were not filled all the way. My recommendation is to tamp the contents lightly as the bag is being filled. This just takes seconds and ensures the bag is filled to capacity so you need fewer bags.
Here’s the process:
1. Fill the bag about half way, fold over the bag (pull the top to one side) and tamp the contents lightly about 2-3 times.
2. Repeat the tamping after you’ve filled the bag to the desired level (experiment until you get find what works best). I fill each bag with the same number of buckets so each completed bag is the same size. This helps maintain level and an even running bond.
At this point you’ll have fat bags stuffed to capacity. The bag has been filled in place on the wall so now all you have to do is tilt it down in place, tight against the previous bag. Do not flatten the bags yet. Wait until the whole course is complete, then tamp. Depending on the size of the bag, each course will be about 5-1/2″ high after tamping, using this process.