How to Prep your Subfloor for DIY Epoxy Flooring

In similarity to most DIY projects, an epoxy floor installation is underpinned by the quality of its preparation. In this situation, it means ensuring that the base, which is usually concrete, is cleaned to perfection, any cracks or damaged patches are repaired and that any other contaminants – such as previous flooring, chemicals or deposits – are removed.

Get this right and you ensure that the building blocks of success are firmly in place, leading to easy application of your chosen epoxy floor.

The 1 – 2 – 3 of Floor Preparation

Preparing your floor for an epoxy installation will vary depending on its condition. Cleaning is only one element – it might also be necessary to repair any cracks or damage as well. There are handy epoxy resin kits available that contain everything necessary to complete this task. These kits are suitable for both small and large areas of damage and are designed to ensure the correct composition for an epoxy coating to be applied over the top.

Once any damage is repaired, the cleaning process can begin. An acid wash is usually included when carrying out a DIY installation. Doing so doesn’t require specialist skills or equipment and is by far the best prep for a concrete floor. The other methods are shot blasting and diamond grinding – both of which require industrial equipment and familiarity in using the machines.

Carrying out floor prep using an acid wash is easy to do. First, gather your equipment.

  1. Appropriate cleaning solutions, including a de-greaser. Epoxy Resin Kits designed for the task are readily available to purchase.
  2. A stiff broom or floor scrubber
  3. An acid wash. 23% hydrochloric acid is ideal – easily sourced from an epoxy flooring specialist. Some people do use pool acid for this stage, which can be an effective alternative.

Once you’ve got the necessary kit, it’s time to carry out the floor prep process:

  1. Clean the floor: Start with a pressure wash at around 3,000 psi. Use de-greaser where necessary. Even if the floor appears to be clean, it’s recommended to also use
    a specialist cleaning solution.
  2. Acid wash the floor: Apply the acid solution to the complete floor area. Use the broom/floor scrubber to work it into the concrete. Leave for 10 minutes. This will remove any stubborn contaminants and slightly penetrate the surface, allowing for better adhesion of the epoxy flooring.
  3. Remove the acid solution: This is carried out by more power washing and should be done before the acid begins to dry. Once spotlessly clean, dry the surface and vacuum to remove the last traces of dust.

Ready for application

The floor is now clean and, once completely dry, is ready for the flooring application. Next steps are made easy using an epoxy resin kit available from specialist providers such as Shimicoat.

Find Shimicoat here: