Description and guidelines for all the processes right from the selection of site to construction of the building, and of orientation of various rooms in directions, height of the rooms, positions of the doors etc. is found in Vastu Shastra. Actually the text that guides us to plan and construct a town, temple, residential house, cattle shed, or any other building equipped with all necessary amenities for the comfort and utility of mankind is given the name Vaastu Shastra which has been divinely described in Indian culture and scriptures.Vastu for Griha Pravesh Griha Pravesh (i.e. first entry into the newly built house) is also as important aspect of Vaastu-Shastra.
After the house is complete in all respects, living in that house is started at some auspicious moment determined on astrological considerations. The first entry in the house at the auspicious moment is called Graha Pravesh ceremony. For any newly built house house warming is considered a holistic occasion. This custom is done so as to keep evil forces away from entering new home. Even after land acquisition, a prayer (puja) is performed which is called as Bhumi Poojan, and later house warming ceremony is called as Vastu-Shanti.