Installing new flooring over an existing surface is a common renovation question, and when it comes to engineered wood, the complexity increases. The specific inquiry of whether you can put engineered hardwood over engineered hardwood does not have a simple yes or no answer. It is a decision that hinges on the condition of the existing floor, the thickness of the new planks, and the overall structural integrity of the subfloor beneath.
Assessing the Current Floor Condition
The most critical factor in determining if you can overlay engineered hardwood is the state of the existing flooring. If the current planks are in good shape—without significant gaps, squeaks, or water damage—you might be able to install the new layer directly on top. However, any sign of moisture issues, persistent flex, or damage is a major red flag. Installing new planks over compromised boards will trap the problem, leading to mold, uneven surfaces, and ultimately, the failure of the new floor.
The Height and Transition Challenge
One of the most practical hurdles is the vertical transition that occurs when you add another layer. Each layer of engineered hardwood adds to the overall height of the floor. This creates a significant step at doorways where the old and new floors meet, as the new layer will be higher than the surrounding rooms. You will need to either remove the door bottoms or undercut the doors to accommodate this increased thickness, which adds time and cost to the project.
Doorway and Threshold Issues
The transition where the new floor meets the old is a high-wear area that is prone to damage. Even if you manage to install the planks, the constant pressure from foot traffic and moving furniture will stress this joint. This often results in the need for a metal reducer strip or a complex custom transition, which can be an eyesore and a point of failure in the long run.
The Underlayment and Leveling Factor
Subfloor imperfections are magnified when you install a second layer. If the existing engineered floor has any unevenness or slopes, the new planks will likely follow those contours, resulting a surface that is not level. An uneven surface makes it difficult to maintain consistent expansion gaps along the walls, which is necessary to prevent buckling. You may need to invest in self-leveling compounds or plywood underlayment to create a stable base, which adds another step to the process.
Checking the Joist Span
Beyond the surface, you must consider the support structure beneath the engineered planks. The floor joists must be strong enough to handle the additional weight of another layer of wood, underlayment, and furniture. If the joists are spaced too far apart or are already sagging, they will not provide the necessary support. This could cause the new floor to develop a bounce or dip, compromising its stability and longevity.
Alternative Solutions to Consider
In many cases, removing the old engineered planks is the smarter long-term investment. While it requires more labor and creates more waste, it allows you to address any subfloor issues directly. You can fix squeaks, reinforce weak joists, and ensure a perfectly level surface before installing the new flooring. This approach avoids the constant reminders of the old floor's limitations that you would have with an overlay.
Making an Informed Decision
Ultimately, the decision comes down to balancing immediate convenience against long-term performance. While putting engineered hardwood over engineered hardwood is technically possible, it is often a compromise that results in a floor that never feels completely solid. Carefully weigh the structural challenges, the aesthetic trade-offs of transitions, and the physical limitations of your home before deciding if the overlay is the right choice for your renovation.
