How to stick carpet to carpet?

To stick carpet to carpet, you should use a strong adhesive designed for this purpose and secure the perimeter.

Step-by-Step Guide to Carpet-to-Carpet Adhesion

While it's generally best to avoid layering carpet on top of another, here’s how to approach it if you must:

Assess the Existing Carpet: Check the current carpet for wear, dampness, or looseness. If there are any issues, address them before attempting to add another layer.
Clean Thoroughly: Vacuum the existing carpet to remove dirt and debris. This ensures a good bond.
Avoid Layering if Possible: If you can, remove the existing carpet before installing a new one to ensure stability and longevity.

Select the Right Adhesive:
- Use a heavy-duty adhesive specifically designed for bonding carpet to carpet. This ensures the strongest possible hold.
Apply Adhesive:
- Apply the adhesive evenly to the back of the top carpet, following the manufacturer’s instructions.
Position the Top Carpet:
- Carefully lay the top carpet onto the existing carpet, aligning it as desired.
Secure the Perimeter:
- Install tack strips or anchors around the perimeter of the room to prevent movement of either carpet layer.
Smooth and Weight
- Use a carpet roller to smooth out any wrinkles and ensure full contact with the existing carpet.
- Place weights on the carpet for the recommended drying time to ensure proper bonding.

Instability: Adding another layer of carpet can lead to instability and movement.
Durability: The underlying carpet might wear out more quickly due to the added stress and weight of the new layer.
Potential for Mold and Mildew: The trapped moisture between layers can promote mold or mildew growth.
Uneven Surface: Layering can lead to an uneven and unstable floor.

Replace Old Carpet: The most reliable and practical solution is to remove the existing carpet and install a new carpet directly on the subfloor.
Use Area Rugs: Consider using area rugs over existing carpets. They are easier to install and remove and they can offer a similar aesthetic without a permanent commitment.

Step	Description
1. Preparation	Assess, clean, and avoid layering if possible.
2. Adhesive	Select heavy-duty carpet-to-carpet adhesive.
3. Application	Evenly apply the adhesive.
4. Placement	Lay the new carpet on the existing carpet and align.
5. Securing	Install tack strips or anchors around the perimeter.
6. Finalizing	Smooth the carpet and apply weights as per instructions for effective bonding.

Remember to always read the manufacturer's instructions of any chosen adhesive before application for safety and effectiveness.