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.
Average cost per square foot: $11 to $19; Material type, square footage and equipment used may result in higher costs for a total patio installation. Types of Stone Pavers. Stone pavers offer a natural look for patios and come in several varieties, including: Cobblestone - to create an old-fashioned look; Flagstone - a common choice for patios and walkways