Kelly and Owen,
I’d like to thank you for all of the wonderful information you have offered for free to the world! I’ve been following along for about a year now and it just keeps getting better and better.
I have a question about insulation and thermal mass. I live in Austin Texas and our summer nights are a lot of times only 20 degrees cooler than the day time high. Which that day time high can get to over 110F. If I build with only earth/adobe filled bags, I don’t think that the house would be very comfortable during the summer months. I’m planning on rebuilding a small dilapidated shed in about a year using the hyperadobe method. The shed will have plumbing and electrical. Basically I’m going to build it just like I would build a house for our family to live in full time. This is going to be a proof of concept to show my lovely wife that it’s not a bad idea and that a house built in this fashion can look professional.
So my question is, how would you go about insulating a building built with the hyperadobe method, or would you build using a different method?
Thank you for any information!
I just looked up what the year-round underground temperature is in Austin, TX, and noticed that it is 71 degrees F. You couldn’t ask for a nicer temperature to live in! A substantially bermed or underground home in that locality could easily become a zero energy home, as far as heating and cooling goes.
You are right that a solid adobe-walled home there would be too hot in the summer for sure. Yes, it can be insulated, either with exterior insulation, or by filling the bags with an insulating material, and this would help keep the interior more comfortable…but you are still going to need air conditioning most likely.
If it were me, I’d go underground!
[Owen: This can include building above grade with earth berming/earth sheltering to reduce the risk of flooding.]