How do you build an outdoor river rock fireplace?

Step 1: Create a Design. Use tape measure to determine width, length, depth and height of fireplace. Step 2: Create a Concrete Foundation. Step 3: Lay Concrete. Step 4: Build a Façade Frame. Step 5: Attach Cement Board. Step 6: Add Mortar. Step 7: Install Stacked Stone. Step 8: Attach Chimney Cap. Click to see full answer. Also to know is, how much does it cost to build an outdoor fireplace?An outdoor fireplace will cost anywhere between $1,500 to $20,000. On average, it will run you about $3,000 to have a fireplace built. Pre-made kits and unfinished contractor models usually only run from $1,500 to $9,000. Custom projects typically cost between $8,000 to $20,000 – some even hitting $50,000.One may also ask, how do you make a cinder block outdoor fireplace? How to Make a Fireplace With Cinder Blocks and Stucco Create an approximate dimension for the fireplace. Measure the outside perimeter of your fireplace on a flat concrete space, using a tape measure. Place a concrete block on the surface so the inside rim of the block lines up against the outside edge of the chalk outline on the floor. Beside this, how do you Mortar a river rock? Take your smaller boulders/stones and lay them down one by one and put about ½ inch of mortar on top of the rocks as you start to layer your river rocks. Do a dry fit first and then “Butter” the rocks and place them into the selected areas. This is why you want to use rocks with flat surfaces.Does outdoor fireplace add value? #5 Consider an Outdoor Fire Pit or Fireplace Installing one starts at about $500, while installing a fireplace starts at about $1,500 and can run up exponentially from there, depending on design. Fire pits and fireplaces ranked third in the most popular outdoor living features on the landscape architecture survey.