![]() If it's too high, be sure to use a permeable overlay system that will permit the moisture vapor to escape. There are simple tests you can perform to check the moisture vapor emission rate of concrete. Too much moisture in the concrete substrate can also be a problem for some overlay systems, especially products that restrict the ability of the concrete to breathe or release moisture vapor as needed. Time: 02:49 CHOOSING THE BEST DECORATIVE CONCRETE OVERLAYĬonsider these factors when selecting your overlay system: What is the state of the existing floor?ĭoes the concrete have a lot of cracks or pitting? Is the surface out of level? If so, choose a higher-build material, such as an underlayment or self-leveling overlay, that can be applied at a thickness of 1/4 inch or greater. Many of today's decorative overlays use acrylics or acrylic blends because these resins provide excellent bond strength and UV resistance. Overlay manufacturers use different types of polymer resins, often blending them to produce proprietary products with distinct physical attributes. While most types of polymer-modified overlays offer similar performance benefits, each system has its own unique characteristics. They adhere well to existing concrete and resist damage from salt, chemicals, UV exposure, freeze-thaw conditions, and abrasion. Polymer-modified overlays can be applied in layers as thin as a credit card or up to several inches thick without delamination or failure. With the many options available, you're sure to find at least one system that meets your requirements for durability, appearance, maintenance, and cost.Īlthough cement overlays have been around for decades, many of today's systems blend polymer resins with cement, sand, and other additives to improve performance, wear resistance, and aesthetic qualities. We also give you pointers on how to choose the best system for a particular application. Here's a primer of the various overlay types available and the decorative options with each. There are multiple options available for achieving any look imaginable with a concrete overlay. Now, the real challenge is choosing from the many overlay types and the diverse array of decorative finishes possible. If your concrete has severe cracks or other damage, resurfacing will not solve your problems and pouring new concrete will be your best option. ![]() The underlying base for an overlay must be sound.
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