Vaastu is practically the science of building or science of structures. Though not fully backed by scientific principles it can be accepted as a science that is backed by results and observations only .The present day vaastu absorbs the theories of the past and super imposes it on the environs of today. Vaastu is an applied science, which is enabling man to live in harmony with nature. The characters that qualify Vaastu as a science are rationality, back up of a theory, permanency, universality, replicability, and utility. Vaastu is based on gravity and weights, which is a universal law, and hence it can be adapted to the changing scenario of the society.
Manifestation of the effects of Vaastu
The vaastu effects are highly specific to sex, age, group and other classifications of the residents. Balancing of the weights of the components of a plot is primary in studying the vaastu of a plot. The heavier things in a plot are the building, water storage structures above the ground, trees and even rubbish dumped indifferent areas. The four types of vaastu occurrences including both good and bad are the cause, the trigger, the contributor, and the moderator. There are four cardinal directions and four corners where they meet. Corners are more important than the main sides. The effects of vaastu are highly specific to the zones.
Vayu controls northwest, Kuber controls mid north, Eshwar controls northeast.
Vayu - public relations, economic conditions, and improvement of business.
Kuberan - wealth
Eshwar - the life of the daughter and lineage.
Eshwar northeast, Indra-mid east, Agni-south east
Agni-south east, Yama-mid south, Nairu-south west. South controls the bad aspects of life.
Nairu -southwest, Varuna mid west, Vayu northwest
The corners where two sides meet are named exclusively after the gods who govern them.
Easanya corner is the northeast corner, Agni the southeast, Nairudhi, the southwest, and Vayu, the northwest corner.
The three major sectors in environmental features are: physical features, neighborhood and road features.updating
The land should not be bought from several forbidden categories of people and from elders or temples .The acquisition of land in the northeast is recommended. Sale of land in the north or east is bad.
The new house after construction should be occupied within a time gap of three months. If it is required to build two houses in the same plot without a compound wall or legal partition before, the house in the south or west should be built first. If a single plot is to be partitioned between two brothers, the elder should take the west or south portion and the younger brother should take the north or east portion. The houses of two brothers should not be exactly opposite each other. Expansion of the existing house should be in all four directions. While cleaning never sweep the house from the door towards the interior. The sweeping motion should be towards the exit. The cleaning motion should not be towards the northeast. There should be no tying of cloth drying lines between the main house and any compound wall on permanent basis.
Vaastu purusha should be prayed to on three occasions namely at the starting of the construction, at the fixing of the door, and at the end of construction. Monday- shukla paksha, Wednesday, Thursday, Friday, and Saturday are considered auspicious for commencement of work.