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How Much Does A Flagstone Patio Cost To Install?

Typical Range: $700 - $5,000

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Flagstone is a flat stone appropriate for a variety of home uses -- including walkways, patios, outdoor kitchens and even roofing. The material offers a number of benefits.

  • It comes in a number of shapes, colors, finishes and textures, offering the perfect stone to complement your home’s exterior or landscape.
  • It withstands water well.
  • Because it doesn’t conduct heat, it will never feel hot to the touch.

The cost to install a flagstone patio will depend on several factors.

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How Much Does it Cost To Have Flagstone Installed?

The cost to install a flagstone patio averages between $15 and $30 per square foot. The total cost of your flagstone project will vary depending on the location of your project, the amount of flagstone required and the square footage you’ll need to cover. Because flagstone is fairly expensive, many homeowners use bricks, concrete or pavers to complete their flagstone patio designs and reduce total project costs. On average, it will cost between $700 and $5,000 to have a flagstone patio professionally installed, depending on these factors.

Additional factors that may affect the total cost of a flagstone patio include:

  • Thickness: Flagstone commonly comes in three widths -- 1”, 2” and 3”, though you can find widths in between.  Usually, a 1” width is used for a concrete sub-base, while 2" and 3" widths work well for pathways and patios.
  • Process: Installing a flagstone patio entails prepping the area, building a base (out of sand or concrete) and laying the stones. Because flagstone is heavy, it’s not easy to do this on your own -- and additional help could increase labor costs.
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How Expensive Is the Actual Flagstone?

The price of flagstone varies by texture, style, thickness and weight (i.e., whether you buy it by the pound or the ton). On average, flagstone costs between $3 and $5 per square foot. And if you’re buying by the ton, you could easily pay as much as $600 to $2,000 for the stone alone.

Here are some types of flagstone and their average prices to help you get an idea of what the material costs:

  • Lyons Red:  $150.00 per ton
  • Colorado Buff: $430.00 per ton
  • Blue Mica Quartzite: $700 per ton
  • Canyon Gold Quartzite: $700 per ton
  • Carolina Rose: $400 per ton
  • Chocolate Gray: $315 per ton
  • Emerald Gray: $300 per ton
  • Oklahoma Multi-Blend: $500 per ton
  • Rosa: $450 per ton
  • Sedona Red: $350 per ton
  • Silver Quartzite: $700 per ton

Note that one ton will cover anywhere between 80 and 225 square feet when laid, depending on the size of the stone. Generally speaking, it’s best to buy two tons of any material, just in case you need to make repairs to the patio over time.

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Common Types of Flagstone Used For Patios

Flagstone is defined as “flat stone,” and there are many types of stone included in its definition. When determining which stone might be best for your patio, it’s important to recognize any potential flaws and consider how the stone may or may not complement your home’s exterior. Here are some stone types commonly used in flagstone patios, along with their pros and cons:

Bluestone: This is a very flat sandstone with a blue-gray texture; it comes in some shades of purple as well.
  • Pros: It’s dense and considered a non-slip surface, so it can hold up to harsh weather.
  • Cons: It needs proper sealing and maintenance to keep its color, especially if it’s installed near a pool.
Photo courtesy of DeAtley Tile & Stone in Austin, TX
Limestone: Composed of calcite, this stone is usually found in the midwest and can be elegantly polished.
  • Pros: It’s durable, it comes in many colors and it works well in humid climates due to its high weather resistance.
  • Cons: It is easily damaged by acid.
Photo courtesy of Signature Stoneworks in Gresham, OR
Quartzite: This stone is smooth and glossy, and it has a long-lasting appearance. It also comes in many different colors, including blue, gray, green and silver.
  • Pros: It’s resistant to wear and tear, rain and harsh chemicals. It’s also more stain-resistant than other types of stone.
  • Cons: It’s hard to shape, so you can’t mold it exactly the way you want. It also requires routine maintenance.
Sandstone: Also known as Arizona flagstone, sandstone has a contemporary and earthy appearance. It’s commonly used in the southwest.
  • Pros: It has a cool surface temperature in the summer and it’s weather-resistant throughout the year. It comes in tightly packed, dense varieties so it can better withstand the elements.
  • Cons: It is porous and will absorb water, making it prone to freezing in colder climates.
Photo courtesy of Decor-Crete in Houston, TX
Slate: This is considered one of the softest stones. With an almost antique appearance, it comes in silver, gray or green.
  • Pros: It’s easy to shape or mold to your needs, so you can use it for walls or specially shaped patios.
  • Cons: It splits easily, and it isn’t widely available. It also requires regular staining and sealing to retain its appearance.
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Benefits of Flagstone Patios

A flagstone patio offers many benefits over materials like concrete, wood and pavers. Some of the main benefits of installing flagstone include:

  • Added space: With a flagstone patio, you’re adding onto your home. It’s ideal for enjoying the warm weather, outdoor entertainment, grilling or just stargazing. And it’s less expensive than an actual addition.
  • Durability: Since flagstone patios are made of natural stone, they are sturdy and reliable. Sealing and staining protects them against the elements and further increases their durability. They won’t crack, chip or fade over time.
  • Increased value: Adding a flagstone patio to your backyard increases the value of your home. And it makes your landscape more appealing to potential buyers.
  • Unique look: No two flagstones are the same. Because of the different colors, sizes and textures available, you will never find one that exactly matches your own -- even if it’s made from the same material.
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Maintenance of Flagstone

Stain or seal your flagstone patio regularly to ensure that it maintains its durability and appearance for as long as possible -- especially if you’ve chosen a softer type of stone. The price to seal a flagstone patio generally falls between $30 and $60 per quart, or $100 to $200 per gallon. You will need to reseal the patio every 18 to 36 months to keep it well-protected.

You will also need to clean the stone regularly to remove excess debris, potentially harmful moisture and other hazards. Sweep the patio often and spot clean stains and molds. To prevent eroding the sealant, use simple cleaners or those crafted especially for flagstone.

Other cleaning tasks for your flagstone patio might include:

  • Mixing bleach and water to remove stains. Apply with a tank sprayer if possible. Then rinse off immediately.
  • Washing with a pressure washer or hose to remove especially harsh stains or harmful chemicals.
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