Machan aduma 4inch dapan. Uba inneth slab eka yata nisa risk ekak ganna epa. With the time water leak ekak awoth slab eka crack wenna tiyana chance eka wadi. But ape tiyanawa 3inch dapu slab ekak(Just as a roof - 200 sft). Ehema danawa nam net eka hodata kambi wadiya dala dapan. Eke nam uda...