Concrete stamping and stamped concrete overlays have one thing in common - both are excellent options for the decorative resurfacing of driveways and patios. So what exactly is the difference between concrete stamping and stamped concrete overlays?
This refers to the process of pouring entirely new concrete and then stamping or impressing it to create designs and texture before it dries; this is typically done with the use of molds that are pressed into the concrete. Ordinary concrete can then be colored to mimic various finishes such as brick, slate, wood, stone or cobblestone. The color is added with the use of dry shakes or color hardeners, and at times, acid stains. It is recommended that sealing be performed to enhance the color and to prevent staining. Some stamping designs may give you the impression that there are "cracks" but they do not go all the way through. There is also technology that enables some contractors to set a stamped concrete pad right next to an existing slab overlay, and stamp the latter with the same pattern and color.
Pros: Concrete stamping is the least expensive paving option out there. It also does not require a lot of maintenance. Concrete stamping is a good choice for your patio and driveway projects because the structure is solid, which means they would not be susceptible to frost-heave or changes in the soil and that nothing can grow through cracks. It also looks natural.
Cons: It can be difficult to exactly match different batches of stamped concrete, especially if the project requires more than one concrete load.
Stamped Concrete Overlays
With stamped concrete overlays, there is already an existing concrete slab. You would just need to apply stamp overlays, as if you are giving the concrete a face lift. There would be need for various blends, which are usually polymer resins mixed with sand, cement and other additives; rubber imprinting tools or acrylic sprays may have to be used as well. Stamped overlays are recommended if the existing concrete is in good condition. They can be a cost-effective option if there is no need to demolish existing concrete and make a new slab. Preparation of the existing concrete still has to be done though.
Pros: The decorative overlays would be applied in thin layers, but when the project is completed, the overlays could bear 6,000 pounds of pressure, making them even stronger than just concrete. With stamped concrete overlays, there are also far more options because the technology used allows for more variety in colors and textures, particularly earthy tones. This means that a homeowner can easily choose overlays that would complement his house, as well as the landscaping themes. This can also be less labor intensive compared to stamping concrete.
Cons: The concrete overlay dries quickly so it can be difficult to fix errors; you would have to be more careful in applying the overlay.
Concrete has remained the building material of choice for most homeowners because it is strong and versatile, and with stamping concrete and stamped overlays, cement finishers and contractors can now come up with lots of creative and attractive outputs.