Cracking the Code: Why Expansion Joints Are Essential in Resin Flooring
In the world of resin flooring, the durability and performance of your installation depend on careful attention to every detail—including the often-overlooked expansion joints. These joints play a critical role in accommodating movement within the substrate, ensuring the longevity and integrity of the flooring system.
Why Expansion Joints Matter
All floors, especially large-scale industrial and commercial installations, are subject to movement. Factors such as temperature changes, vibrations, and structural settling can cause the substrate to expand or contract. Without properly prepared and treated expansion joints, this movement can lead to:
– Cracking or delamination of the resin coating
– Water ingress and substrate damage
– Premature failure of the flooring system
A common mistake is assuming the existing substrate joints can be coated over without preparation. In reality, this can result in resin coatings cracking along these weak points as the substrate moves.
Best Practices: The V-Cut Method
To prevent cracking and ensure a seamless, durable finish, the following method is considered best practice for preparing expansion joints:
– V-Cut the Joint: The existing joint should be carefully V-cut to remove any loose material and create a clean channel. This step ensures the joint is well-defined and free from debris.
– Rake Out the Joint: After V-cutting, rake out the joint to achieve the proper depth and remove any remaining loose material.
– Refill with Epoxy Mortar: Fill the joint with high-strength epoxy mortar to provide a solid foundation. This material is resistant to compression and movement, creating a stable base.
– Re-Cut the Joint: Once the epoxy mortar has cured, re-cut the joint to create a precise channel for the final sealant.
– Refill with Polyurethane Jointing Compound: The final step is to refill the joint with a flexible polyurethane compound. This allows the joint to accommodate movement without transferring stress to the resin coating.
Benefits of Properly Prepared Expansion Joints
When done correctly, this method:
– Prevents Cracking: Flexible joint compounds allow for movement while protecting the resin surface.
– Improves Durability: Reinforced joints reduce stress points and enhance the lifespan of the flooring.
– Enhances Aesthetics: Properly sealed joints blend seamlessly with the resin coating, maintaining a clean, professional appearance.
– Protects Investment: Avoiding cracks and failures minimises repair costs and downtime, ensuring the flooring system delivers its full value.
The Takeaway
Expansion joints are not just a technicality—they are a cornerstone of successful resin flooring installations. By following best practices like the V-cut method and using high-quality materials, you can prevent costly issues and deliver flooring solutions that stand the test of time.
At Floortrak, we prioritise these critical details in every project to ensure the highest standards of durability and performance.
Are you planning a resin flooring project? Let’s discuss how proper expansion joint preparation can protect your investment and keep your floors in top condition.