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How to lay pavers for rounded steps

Updated July 20, 2017

You can lay bricks and flagstone pavers with a semicircular cut to build rounded steps. Flagstone paver steps can be cut to size and shape at your DIY stockist. To ensure a simple but strong foundation, you can construct your steps on top of an existing pavement that is smooth and stable.

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  1. Place a pin into the end of your tape measure and press the pin into the centre point of the bottom of the doorframe. Use a piece of chalk and the tape measure to draw a semicircle with a 7.5 cm (2 11/12 inch) radius around the pin origin in the door frame. Mix three parts sand with one part cement and enough water to make a paste.

  2. With your trowel spread enough 1.3 cm (1/2 inch) thick mortar for three to five radial kerb pavers beginning on the inside of the chalk semicircle line on the pavement next to the wall. Spread mortar on the side of a kerb paver that will face the wall of the house and press it firmly against the wall and into the mortar on the pavement. Tap the kerb paver firmly into the mortar with the handle of the trowel.

  3. Lay the next two to three kerb pavers onto the spread mortar tapping them into place with the trowel handle. Repeat this procedure, spreading the mortar on the pavement and then adding the kerb pavers all the way around the radius of chalk in the semicircle. Continue laying radial kerb pavers against the doorframe wall to return to the first block laid.

  4. Spread mortar over the top of each kerb paver. Lay the 90 cm (3 foot) flagstone semicircle on top of the kerb pavers with the flat side pressed against the door frame wall. Use the chalk, the pin and the tape measure to draw a semicircle onto the flagstone step with a 7.2 cm (2 5/6 inch) radius around the pin origin in the door frame.

  5. With your trowel spread enough 1.3 cm (1/2 inch) thick mortar for three to five radial kerb pavers beginning on the inside of the chalk semicircle line on the flagstone step next to the wall. Spread mortar on the side of a kerb paver that will face the wall of the house and press it firmly against the wall and into the mortar on the flagstone step. Tap the kerb paver firmly into the mortar with the handle of the trowel.

  6. Lay the next two to three kerb pavers onto the spread mortar tapping them into place with the trowel handle. Repeat this procedure, spreading the mortar on the first flagstone step then adding the kerb pavers all the way around the radius of chalk in the semicircle. Continue laying radial kerb pavers 8 mm (1/3 inch) higher against the doorframe wall to return to the first block laid. The extra height in back will direct water away from the doorway and prevent standing water.

  7. Spread mortar over the top of each kerb paver. Lay the 75 cm (2 1/2 foot) flagstone semicircle on top of the kerb pavers with the flat side pressed against the doorframe wall. Let dry for 48 hours before using steps.

  8. Tip

    Your semicircular flagstone step should be at least one foot wider than your doorframe. For semicircular flagstone steps with a radius of more than 1.2 m (4 feet) you should use the standard unit kerb pavers instead of the radial kerb pavers.

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Things You'll Need

  • Twine
  • Chalk
  • Tape measure
  • Radial kerb pavers
  • 75 cm (2 1/2 foot) radius flagstone semicircular cut step
  • 90 cm (3 foot) radius flagstone semicircular cut step
  • Mortar
  • Trowel

About the Author

Barbara Freeman is a teacher and has been writing since around 1995. She's written curriculum for Discovery NutshellMath software and her NutshellMath tutorials appear on the Discovery Cosmeo homework website. She's also written for Freshfilm.com. Freeman earned a Bachelor of Arts, a credential and a Master of Arts in educational technology.

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