Flagstone is not a type of rock but rather a generic term for any large, flat, quarried pieces of natural sedimentary stone that are typically used for landscape walkways, patios or indoor flooring.
Typical costs:
A flagstone path can cost $2.50-$5 or more a square foot for just the stone, or about $300-$1,000 for a typical do-it-yourself project. Professional installation brings total costs to $10-$25 or more a square foot for dry laid and $20-$40 or more a square foot for wet-set. For more details, see How Much Does a Flagstone Walkway Cost.
Materials alone for a flagstone patio can cost $3-$5 a square foot or more, or about $200-$1,000 for up to 10'x20,' and $1,200-$2,000 for a 20'x20' area. Professional installation can bring total costs to $7-$20 a square foot for dry-set and $15-$35 or more a square foot for wet-set. For more details, see How Much Does a Flagstone Patio Cost.
Professional installation of a flagstone floor can cost $6-$32 or more a square foot), or $600-$1,700 for a 10'x10 are in limestone; $600-$2,000 in slate; and $600-$3,200 in travertine. For more details, see How Much Does a Flagstone Floor Cost.
What should be included:
Many types of stone can be called flagstone, including slate, sandstone, bluestone, fieldstone or limestone. LandscapingNetwork.com provides a comparison chart[1] for common kinds of stone that can be used as flagstones.
Additional costs:
Indoor flagstone flooring is typically sealed to reduce wear and stains, and many contractors recommend sealing outdoor flagstone to preserve the stone and give it a more colorful "wet" look. Sealant averages $30 -$60 a quart, or $100 -$200 a gallon; stone cleaners run $10 -$40 a quart.
Discounts:
Do-it-yourself installation is a money-saving option with flagstone, particularly for simple dry-set patios or walkways.
Shopping for flagstone:
If possible, get several estimates. Be somewhat wary of a flat per-square-foot price quoted over the telephone; there are so many factors that can affect the cost, a contractor typically needs to see the site before giving a firm quote.
Ask for and check references from satisfied customers; check that the company is properly insured and licensed.
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