[leobg]

Exactly. Talking about thermal mass!

There’s also the movement of underground houses. They use the ground for cooling in summer and for insulation in winter. Also it apparently makes for great noise reduction, in spite of having lots of windows, light and views.

See the book “Recovering America: A More Gentle Way to Build”.

[swader999]

Underground houses can be a nightmare dealing with water infiltration, codes and the power of soil.