According to Vastu Shastra, the Site soil decides the type of foundation for the building and therefore the cost. Some soils are good for holding a regular foundation while others may require specially designed (and more expensive) pile foundations.
Vastu Shastra lays down guidelines to aid you in the Selection of a Site with the ideal ‘Soil’. Since Vastu is a science, every guideline is based on logic and reasoning. As an Architect, I have attempted to explain these guidelines rationally and scientifically, so that you can decide what you want to follow and what you don’t, instead of blindly following them like a superstition.
ACCORDING TO VASTU SHASTRA, WHAT IS THE IDEAL TYPE OF SOIL IN A SITE?
Cultivable land: While purchasing land, it is best to buy land that can be cultivated, i.e., where vegetation can grow. The Logic – There are different types of soil based on the colour– brick red, dark brown, white, red, yellow, black etc. Generally the soil which is good for cultivation like red, brick red, brown, yellow soil etc is also good for the foundation of a building. Whereas, black and clayey soil which is not good for cultivation is also not good for buildings as it retains water and can cause dampness to the foundation.
Avoid rocky soil: Land with too many rocks and thorny trees is not considered good. The Logic – This is because it may be an indication that there is rock below which will have to be blasted out before laying the foundation, resulting in unexpected expenditure.
Avoid land with lot of worms: The Logic – This may be an indication that the soil is very loose and will not support the foundation well.
Avoid a Site in which a grave has been found while excavating: The Logic – Psychologically, it can be very unsettling for the residents.
ACCORDING TO VASTU SHASTRA, IS THERE ANY WAY OF CHECKING THE SUITABILITY OF THE SOIL FOR CONSTRUCTION?
Refilling a pit with soil: Dig another 2’x2’x2′ hole and then fill it up again. If some soil is left over after filling, the land is good. If there is no soil left after filling up, it is average. If the hole is not fully filled, it is not good. The Logic – This is the test to determine the soil’s natural moisture, density and aeration. If the hole is not fully filled up, it means the soil is dense and clayey and hence will retain water which is not good for a building foundation.
Surprisingly, even today we adopt the same method for testing the soil at a Site. In fact, it is the first thing an Architect instructs the Client to get done, so that the kind of structure can be decided and the structural engineer can design the structure and foundation accordingly.
This post was about the importance of Site Soil in the Selection of a Site. Read about another important Vastu Shastra consideration when Selecting a Site, namely:
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