Not having enough of these protective substances can cause stones. Changes in the Acidity of the Urine. Changes in the acid balance of the urine can affect stone formation. 1  Uric acid and cystine stones mainly form in acidic urine.
1 For an average sized 1,500 square foot roof, that works out to a total PVC roofing cost of $6,000 to $18,000. 2  While certain types of PVC roofing material can be installed over the existing roof, the old roof may need to be removed and disposed of at an additional cost of $1.00 to $2.00 per square foot. While certain types of PVC roofing material can be installed over the existing roof, the old roof may need to be removed and disposed of at an additional cost of $1.00 to $2.00 per square foot.
Construction Cost for RCC Roof / Slabs. Dear Jha. For calculating the cost of the slab, if your area of slab is without beam than the cost of Rcc slab excluding MS steel is Rs 80-00 per sq feet.and cost of steel bars is 72-00 per sft to the prevaling rates in july 2012. Dear Jha.