Naturally Cool Cob Playhouse

Reader Contribution by Adam Robertson
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This article was originally posted in Instructables and is reposted with permission from Adam Robertson.

Here in central California summers are very hot and dry. Being outside can be uncomfortable, so we wanted to create a naturally cool (cool as in temperature) area for our son. Since the ground here is full of clay, we thought a cob layer on a playhouse with a living roof would provide sufficient cooling … and it works! This play area is one of the coolest spots on the property during the blistering hot summer heat. It also stays bone-dry inside during the winter.

Since I used scrap-wood and earth already available to me, I only had to purchase a few items. Total Cost: $30.00

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