I agree completely. It is just as important to insulate for air as for heating. However as I stated the difference in temperature between the outdoors and how much we want to cool is at most... in the summer about 20°c. So the amount of energy lost is minimal compared to in Canada where the difference can be 60°+. What is more important is the sealing of drafts. Often in Canada or the states we make air tight homes and then put lots of little holes that we don't seal properly. The cost of materials here can be very prohibative. What is adobe????? wattle and daub? wood chips with clay? I have decided to sheath directly on the frame with plywood and then build a wall inwards with 2x4's. I will probably but the studs at 2' rather than 16 inches, but it does leave me an option for insulation.
Carlos
