Apple cider vinegar can be diluted half-and-half with water for external application, and, when stronger measures are needed, it can be used full-strength.
1 Just the stone for a flagstone patio can cost $3 -$5 a square foot or more, depending on location and the type and quality of stone, or about $600 -$1,000 for an average patio up to 10'x20,' and $1,200 -$2,000 for a larger 20'x20' area.
Minimum cost: $8.48 per square foot. Maximum cost: $19.38 per square foot. A natural stone patio can cost anywhere from $8.48 per square foot to $19.38 per square foot including the cost of materials and labor. However, the average cost of installing a natural stone patio is closer to $12.98 per square foot.This means that a 100 square foot natural stone patio would cost homeowners between $1,070 to $1,527 on average, which includes $308 to $380 worth of materials and $762 to $1,147 worth of installation costs. natural stone patio can cost anywhere from $8.48 per square foot to $19.38 per square foot including the cost of materials and labor.