Brian Knight wrote:...energy performance will be better with the higher R values in the wood frame minimums....
Brian Knight wrote:A dwelling that is "traditional-natural" that uses mainstream amounts of un-renewable energy to stay comfortable, does not adhere to permaculture principles to me.
Air-leakage and fenestration being equal, a stone, adobe or rammed earth wall will lose heat roughly 11X faster than a similar thickness R50 straw bale wall.
Brian Knight wrote:Most folks measure the performance of building envelopes by air leakage, insulation and fenestration.
Brian Knight wrote:What about thermal mass walls like cob, stone, rammed earth, and logs? As my quick statistic was meant to show, they can be a huge problem when we are trying to heat or cool a home or building. The only climates where thermal mass walls have been proven as effective as walls with insulation is where there is consistent, year-round temperature swings between day and night. While this can happen in all climates during certain times of the year, its very rare for a climate to experience this most of the year especially for the diurnal swings to bracket the 70 degree human comfort zone.
It wasn't my idea to go to some crazy nightclub in the middle of nowhere. I just wanted to stay home and cuddle with this tiny ad:
Rocket Mass Heater Manual - now free for a whilehttps://permies.com/goodies/8/rmhman