Things to consider for Concrete Sidewalks
Consider compaction and groundwork- concrete sidewalks do well where the subgrade underneath has good compaction and groundwork. When the compaction is steady and even, it reduces the chances of your sidewalks cracking.
While some people place concrete directly on the subgrade, it will last longer when a rough subbase layer is placed between the slab and the subgrade. Doing this ensures enough support and proper bonding of subgrade flaws.
Contraction joints are used to minimize the risks of slab cracking. This allows contractors to control areas where cracks generated by contractions can occur in the concrete. Contractors do this by cutting the control joints at a depth that is around ¼ of the slab’s thickness. Also, the joints should be at least 2-2.5 times the slab’s thickness in inches between each other. Therefore, with a slab thickness of 5 inches, the distance between should be 10-12.5 feet.
Make sure that you evaluate the area to find out whether the trees can damage the concrete slab as a result of their roots growing.
If you have trees nearby, leave a distance of 2 sidewalks widths between them and sidewalk edges. But if you’re thinking of planting trees near the sidewalk, opt for smaller species like spruce or polar as these will not uplift the slab. Note that tree roots can damage the ground underneath the concrete such that your concrete may become a trip hazard.