How to Estimate Under Stone Pavers

Measure the length and width of the patio area. Round non-whole amounts up to the next whole foot.

Find out how much weed-blocking fabric is needed. Rolls of weed-blocking fabric are 36 inches wide and 50 feet long and are installed in rows with 2-inch overlaps. Calculate how long each row will be in feet, based on the length of the area. Subtract the 2-inch overlap from the width (36 -- 2 = 34) and convert that amount to feet (34 inches = 2.83 feet). Divide the width of the area by the width of the fabric, minus the overlap, to determine how many rows are needed. Multiply the length of the rows by the number of rows to determine how many total feet of fabric is needed.

Determine how much cubic feet of gravel is needed to provide a sufficient bed for the paver patio. Average gravel beds are 4 inches, but this thickness may vary depending on the site. Convert inches to feet (4 inches = .334 feet). To determine cubic feet, multiply the length of the patio, by the thickness of the gravel bed needed, by the width of the patio. Acquire approximately 100 lbs. of gravel per cubic foot.

Calculate how much cubic feet of sand is needed to top the gravel. Sand beds are typical 1 to 1-and-1/2 inches. Convert inches to feet (1-and-1/2 inches = .125 feet). Multiply the length of the patio, by the thickness of the sand bed needed, by the width of the patio to estimate the cubic feet of sand. Purchase approximately 100 lbs. of sand per cubic foot.