External stone walls upto lintel height and brick above.This ensures a balance between using the locally abundant material - stone, providing optimum thermal insulation along with ease of construction. Added benefit is reduced loading of the lintel members.

External stone walls in Stone (18" thick)
Internal walls in brick (9" thick)

Attic located under the ridge, in the central portion of the house. Along with optimising the volume under the roof, it also helps to keep the ground floor thermally insulated.