Yes, you can lay carpet tiles on carpet, although it's generally not recommended for optimal results.
While technically possible, installing carpet tiles over existing carpet can lead to several issues. The existing carpet provides an unstable base, potentially causing the tiles to shift, buckle, or become uneven over time. This is especially true for thicker, plusher carpets.
Here's a more detailed breakdown:
Why It's Often Discouraged:
- Unstable Base: The existing carpet creates an uneven and soft surface, making it difficult for the tiles to adhere properly and maintain a level appearance.
- Movement and Shifting: Foot traffic can cause the tiles to move or shift due to the give in the underlying carpet, leading to gaps and an unprofessional look.
- Buckling: The carpet beneath can compress unevenly, resulting in buckling or waves in the carpet tile surface.
- Reduced Lifespan: The added stress on both the tiles and the existing carpet can reduce their lifespan.
- Moisture Issues: Existing carpet can trap moisture, potentially leading to mold or mildew growth underneath the tiles.
When It Might Be Acceptable:
There are limited circumstances where laying carpet tiles on carpet might be considered, although it is still not ideal:
- Very Low Pile, Firm Carpet: If the existing carpet is extremely low pile (almost like commercial carpet) and very firm, it might provide a stable enough base.
- Temporary Solution: If you need a very temporary solution and appearance isn't a major concern.
- Using a Proper Underlayment: If the existing carpet is of a stable type and you are willing to invest in an underlayment specific for use with carpet tiles on top of carpet.
- Small Areas: For very small, low-traffic areas, the risk of issues is reduced.
Better Alternatives:
- Remove the Existing Carpet: The best solution is almost always to remove the existing carpet and install the tiles directly on a clean, level subfloor.
- Prepare the Subfloor: Ensure the subfloor is clean, level, and free of debris before installing the carpet tiles.
- Use Appropriate Adhesive: Select the correct adhesive recommended by the carpet tile manufacturer.
In conclusion, while technically possible, laying carpet tiles directly on existing carpet is generally not advisable due to potential stability and longevity issues. Removing the old carpet and preparing the subfloor is almost always the superior approach.
