Some types of foods have the opposite effect of vitamin C and inhibit nonheme absorption. While it can reduce the effect of nonheme inhibitors, vitamin C can't prevent them from interfering with nonheme iron absorption. Beans, grains and rice contain a substance called phytic acid, which binds with nonheme iron and prevents absorption.
Type of roofing material matters. According to Homewyse, which provides average costs for home improvement projects, the cost per square foot for a shingle roof is between $5.43 and $7.05. That equates to about $1,086 to $1,409 per 200 square feet (or for two squares). Homewyse estimates the cost and labor for an asphalt roof for a 1,200-square-foot house in larger markets across the country ranges between $4,100 and $6,000.
The national average for a 3,000 square foot asphalt shingle roof is roughly $11,500. The actual cost varies. Like anything, urban areas are generally more expensive than rural areas. The average cost of a roof in New York, for example is close to $15,000.The same roof replacement in Georgia or the deep south will probably cost less than $9,000. The Midwest is also less expensive. Homeowners in Wichita, Kansas pay an average of $10,000.ven within the same general region of the country, prices vary drastically. The average cost of a new roof in the Carolinas hovers around $7,000 while Atlanta homeowners pay around $10,000.