2. Continue to clear the walkway of sod, lowering the path slightly. Dig a trench along both sides of the walkway to prepare for concrete (figure A). Continue to reduce the amount of dirt so that the entire walkway is several inches deeper. 3. Create a form by using flexible siding along both sides of the path (figure B). Drive stakes in behind the siding and secure the siding to the stakes with a power drill and screws. Be sure to drive the stakes below the top edge of the plastic siding so that when you are leveling the concrete the screed won't be impeded (figure C).
4. If you are reusing the stones, clean the dirt and debris from them with a scrub brush and mild bleach solution. Use a water hose to rinse the stones of mud and bleach. You want the stones clean and free of loose dirt.
5. You are now ready to mix and pour concrete. For a long path, it is advised to pour in sections. Mix the concrete according the manufacturers suggestions. Concrete should have the consistency of mud--thick, but easy to spread. Pour the first batch of concrete into the path area and spread it out (figure D).
6. Keep each section separate by dividing with a 1x4 board and stakes. Use another 1x4 as a screed to level the first area. Rest the screed board on the plastic forms and, using a sawing motion, pull the board slowly toward the end of the section (figure E).
7. Lay the first stone near the foot of the steps to begin stone placement. Set the stone into the concrete by stepping on it and wiggling it in. Continue to place stones, filling in the gaps by placing smaller stones among the larger ones (figure F). Use a trowel to add or remove mortar to ensure even placement of the stones.
8. Once the concrete begins to cure, use a damp brush to add a rougher finish to the surrounding concrete so that it isn't so smooth and slippery when it dries completely (figure G). Use a wire brush to clean off the concrete on the edges of the stones. Continue this process for the entire length of walkway.
9. For steps that can be repaired, thoroughly remove and clean the stones and add mortar to the base. Imbed the rocks in the new mortar and set in place with a rubber mallet. Fill any cracks with additional mortar (figure H) and a small, pointed trowel.
10. Once the mortar has cured, the stones and the entire walkway will look brand new (figure I). The cost for a project like this is in the neighborhood of $300 and takes around three days.