Travis Johnson wrote:A layer of sawdust in my lambing pens will bring the temp up by 10 degrees. I would just use that and refresh as needed.
William Bronson wrote:There is a nearly ideal material, Foam glass:
( https://www.buildinggreen.com/blog/foamglas---my-new-favorite-insulation-material )
The only drawback is cost.
That could be a deal killer.
Mike Jay wrote:Seth, have you seen the greenhouse Gerome Osentowski has in Colorado at 7200 feet? His site is called CRIMPI. He uses geothermal air to maintain a tropical greenhouse year-round.