Hi I'm in the process of redesigning my coop. I'm bringing it into a section of our a utility shed. I'm trying to stay away from timber and make it as ideal to minimise pest/bacteria/viruses without jeopardising the mental welfare of my flock. Our region is built on pumice which is well draining, but probably to fine to use as flooring in the chicken coop. I currently use untreated wood shavings and I change it out weekly as I get it free. Research has told me that course,construction grade sand is a very clean media to use with poultry. My area gets frost in the mornings during autumn and winter and probably snows once a year. Would sand be too cold for the coop during these colder months? What suggestions do you have?