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.
It depends on the type of roof. A single story low pitch asphalt shingle roof will cost around $40 - $80 per square (100 sq. ft.) to tear off and $75 - $100 per square to install new shingles. If the plywood sheathing underneath is damaged, it will cost extra, up to $50 per sheet replaced.Some contractors charge for flashing chimneys ($150 - $300) and pipes ($25). All labor performed on steep pitch roofs (7/12 and higher) will be about 10% or 15% higher. Two story housed may be 5% to 10% more.Other types of roofing have a wide range of prices. It really depends on which state you live and how steep the roof is and how many roofs already are on the house.f the plywood sheathing underneath is damaged, it will cost extra, up to $50 per sheet replaced. Some contractors charge for flashing chimneys ($150 - $300) and pipes ($25). All labor performed on steep pitch roofs (7/12 and higher) will be about 10% or 15% higher.