Epoxy Flooring Applications - Bubbles in the Screed (due to incorrect application process)

This article will focus on the improper epoxy flooring application techniques that may well lead to bubbles appearing on the surface of a self-levelling screed. Problems during the installation process can be attributed to a variety of reasons and here are some suggestions to help eliminate some of them:


  • When you are mixing the components that make up the screed (resin, hardener, sand) it is important to mix at a slow and steady rate. Mixing at high speeds will most probably lead to the material foaming and hence an excessive amount of bubbles emerging.  It is always advisable to use a mixer tool with a fully adjustable speed and never exceed 300 rpm. Some epoxy flooring installation teams in their rush to finish quickly, opt to mix for a short period of time at high speeds. This only causes problems that will result in the project taking much longer in the end. Another thing to remember is that after mixing the screed, let the new screed “rest” for 2-3 minutes before applying it.
  • Using spiked rollers to release the bubbles in the epoxy screed: Possibly the most important factor is what happens when you apply the actual epoxy flooring screed. Here, the use of a spiked roller is essential to enabling you to properly level and subsequently release any trapped air within the screed. This is a process whereby it is important that it must be done repetitively. Additionally, it is just as important that the person who is applying the spiked roller must use spiked shoes to be able to access the entire floor surface. It is a fact that many epoxy flooring projects fail because the application team did not properly inspect the entire area to enable them to all focus on the same process plan.
  • Another regular issue with epoxy installation problems is poor lighting which is a common problem when working in underground areas, and/or in facilities that are still under construction whereby proper lighting has yet to be installed. If this is the case, then it is imperative that the installation team bring its own lighting equipment so that it can properly inspect the entire surface for bubbles together with other potential problems.
  • The most common areas for bubble formation are near walls, corners and doors. This is because that these areas are usually not applied with a roller like the other areas. It is also likely that visibility is slightly limited because of shadows and obstructions. Always allocate one person who is to undertake the task to properly apply the roller in all these sensitive areas.

In Conclusion. So as to avoid bubbles and other problems during installation, the installation team must adopt a strict methodology and the Project Manager must understand that a lot of responsibility rests on their shoulders to supervise the entire epoxy flooring procedure to ensure the best possible outcome.

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