Although hemp bales are to be found in ireland they are all imported from europe and the uk, prices per bale have varied from 16 euro to 22 euro and while it is legally possible to grow a hemp crop here ,the terms and conditions imposed are hard to meet ,then as far as i can establish there is no processing plant to remove the fiber layer. The shed i want to insulate is timber framed --untreated -- and has a corrugated sheet iron skin , by my rough calculations i would need to use 400 bales so costs for using hemp soon put this project down as a dream. Then after speaking to a few people with hempcrete experience i was advised not to try and use anything else as a substitute , but all of this well meaning and help full advise centers around hemp shiv as the only plant based material with a very high silica content , this element is reported to be responsible for the lime binder being able to react and start its set up process. Lots of reading later and some of this information that is reported as fact seems to be a little mis- understood well by me at least, hemp plant does not have the highest silica percentage content, that first prize goes to most of the cerial based stalk type plants with rice hull/husks being the highest. Some further reading and sifting out of facts later and i purchased 10 bales of miscanthus grass to do my own test batches and blocks of m/crete , settling on a recipe or formula was not easy as each internet sourced formula and mix was different , but a study done in sweden on hemp binder and ratios gave me a starting point .I first mixed up each batch by hand and found the easier way was to use a pitchfork and an old bathtub , not as heavy on the back as trying to do this with a shovel and the plug hole meant if i had to much water some could be leaked out.