Another important parameter that is important to consider when designing a building in Kathmandu is the Monsoon rains. The envelope of the building has to be water proof and also has the ability to transport moist from the inside and out in the warm humid summer, in other words it has to breathe. The roof overhang will help to protect the walls envelope and with an inclined roof transport the water away from the façade. It is also important to consider how to transport the water away from the building’s foundation. In Kathmandu this happens naturally as it is in a hillside.
Considering all this it is easy to say that the vernacular buildings in Kathmandu is energy optimized and there is much to learn by studying their climate and their way of constructing.