Alright, let us talk about sidewalks. You would think a strip of concrete would be pretty straightforward, right? But I get a lot of the same questions from folks all over Athens, from Five Points to Normaltown, and it tells me there is a lot of confusion out there in Athens. So, I figured I would lay out some honest answers to the questions I hear most often about concrete sidewalks in Athens, GA. No fluff, just what you need to know about your Athens concrete.
Why do concrete sidewalks crack, even new ones here in Athens?
This is probably the number one question I get about concrete sidewalks in Athens. Look, concrete cracks. It is just a fact of life for the material. It is strong in compression, meaning it can handle a lot of weight pressing down on it, but it is weak in tension. That means when it gets pulled apart, it is going to give. Those cracks usually happen because of a few things with your concrete sidewalks in Athens:
- Shrinkage: As concrete dries and cures, it shrinks a little bit. This creates internal stresses, and if those stresses get too high, it will crack. That is why we put in control joints for your Athens concrete sidewalks – those lines you see every few feet. They are basically planned, weakened spots where we want the concrete to crack, so it does not just crack randomly all over the place on your Athens property.
- Temperature Changes: Georgia weather, especially here in Athens, can swing pretty wildly. Concrete expands when it is hot and contracts when it is cold. If it does not have room to move, it will crack. Expansion joints are there to give it that breathing room, especially where your concrete sidewalk in Athens meets a building or another slab.
- Soil Movement: Our famous red clay soil here in Athens is a big culprit here. It expands when it gets wet and shrinks when it dries out. This constant movement underneath your Athens concrete sidewalk can cause it to shift, settle unevenly, and crack.
- Tree Roots: Especially in older neighborhoods in Athens with mature trees, roots can grow under and lift sections of your concrete sidewalk, leading to cracks and trip hazards for folks in Athens.
What is the deal with those lines in the sidewalk? Control joints versus Expansion joints for your Athens concrete?
Glad you asked, because they are both important for concrete sidewalks in Athens and people often mix them up. They both help manage cracking in your Athens concrete, but they do it differently.
- Control Joints: These are the grooves you see cut or tooled into the concrete, usually every 4 to 6 feet on a concrete sidewalk in Athens. Their job is to create a weak plane in the concrete slab. Concrete will crack, so we are basically telling it, ---