If your ground floor made of white marble gets damp and wet as if it has been mopped as soon as it rains, there could be several possible reasons for this issue:
Poor drainage: The most common reason for water seeping into the ground floor during rains is poor drainage around the building. If the ground outside your house does not slope away from the foundation or if there are clogged or insufficiently sized gutters and downspouts, rainwater can accumulate near the foundation and find its way into the house.
Cracks or gaps in the walls or foundation: If there are any cracks or gaps in the walls, windows, or foundation of the building, rainwater can easily seep through and cause the ground floor to become damp.
Leaky roof: A leaking roof can lead to water dripping down into the ground floor, making it damp during rainy weather.
Capillary action: Some types of marble may be more susceptible to water absorption due to capillary action. Capillary action is a phenomenon where water is drawn into small pores and gaps in the material.
Condensation: During heavy rains or high humidity, condensation can occur on cool surfaces like marble, making them appear damp.
Lack of proper sealing: If the marble surface is not adequately sealed or maintained, it can become more porous and prone to water absorption.
To address this issue, you may want to consider the following steps:
Improve drainage around your property to ensure that rainwater flows away from the foundation.
Inspect for any cracks or gaps in walls and foundation and seal them properly.
Check the roof for leaks and repair them promptly.
Consider using a suitable marble sealant to reduce water absorption and protect the marble surface.
Ensure proper ventilation in the affected areas to minimize condensation.
If the problem persists even after taking these steps, it is advisable to consult a professional contractor or building specialist who can assess the situation and provide more tailored solutions for your specific case.