The answer to whether Redgard can be installed over drywall is a bit more complex than a simple “yes” or “no.” While Redgard can be applied over drywall, it is crucial to take certain precautions and follow specific installation guidelines. Here are some important considerations:
- Drywall preparation: Before applying Redgard, the drywall surface must be properly prepared. This involves ensuring that the drywall is clean, free from dust or debris, and any damaged areas are repaired. The surface should be smooth and even, as Redgard may exaggerate any imperfections.
- Priming: Priming the drywall is an essential step before applying Redgard. This helps to create a better bond between the Redgard and the drywall surface, ensuring optimal adhesion.
- Joint reinforcement: Drywall joints are vulnerable points that can allow water penetration. To strengthen these areas, it is recommended to use a fiberglass mesh tape over the joints before applying Redgard. This helps to prevent any cracks or gaps from forming, ensuring a more watertight seal.
- Multiple coats: Redgard typically requires multiple coats to ensure adequate coverage. Each coat should be applied in a uniform and thin layer, following the manufacturer’s instructions regarding drying time between coats.
- Tile installation: If the intention is to install tile over the Redgard-coated drywall, it is important to follow the proper tiling installation methods. Redgard is not a substitute for a proper tile backer board, such as cement board or fiber cement board. It is designed to act as a waterproofing layer behind a suitable tile substrate.
While Redgard can be installed over drywall, it requires proper preparation and adherence to the manufacturer’s guidelines. Drywall is not a naturally waterproof material, and using Redgard can provide an added layer of protection against moisture and potential water damage. However, it is important to keep in mind that Redgard is not a substitute for using appropriate moisture-resistant substrates such as cement board or fiber cement board in areas prone to water exposure. Proper installation techniques, including priming, joint reinforcement, and multiple coats, are necessary for optimal results when applying Redgard over drywall.