Installing backer board is an essential step in creating a stable and reliable foundation for tiles in wet areas such as bathrooms, kitchens, or swimming pools. It helps to prevent moisture infiltration, tile cracking, and mold growth. However, many people wonder if backer board can be installed underwater, such as in a pool or underwater feature. In this article, we will explore whether it is possible to install backer board underwater and discuss alternative solutions for aquatic installations.
Understanding Backer Board:
Before delving into the underwater installation aspect, it’s crucial to understand what backer board is and its purpose. Backer board, also known as cementitious board or cement board, is specially designed for tile installations. It is composed of a combination of cement, sand, and fiberglass mesh. Backer board provides a sturdy, moisture-resistant surface for tiles, ensuring they remain durable and long-lasting.
Limitation of Traditional Backer Board:
Traditional backer board, commonly used in residential and commercial projects, is not designed to be submerged underwater for extended periods. Although it is moisture-resistant, it is not completely waterproof. It is primarily designed to withstand intermittent exposure to moisture, such as in shower areas, where occasional splashes are expected. Prolonged exposure to water can compromise the structural integrity of the backer board, leading to warping, delamination, or failure.
Alternative Solutions for Aquatic Installations:
If your project requires an underwater or fully submerged installation, there are alternative solutions available that can provide a suitable substrate for your tiles. These solutions are specifically designed for aquatic environments and can withstand the constant presence of water.
1. Waterproof Membranes:
Waterproof membranes are a popular alternative for underwater installations. These membranes are specifically engineered to create a water-tight barrier, preventing water from penetrating the substrate and causing damage. They can be applied over various types of surfaces, including concrete, plywood, or even existing tiles.
2. Marine-Grade Plywood:
Marine-grade plywood, often referred to as “marine plywood,” is another option for underwater installations. This type of plywood is manufactured using waterproof glue and high-quality veneers specially treated with preservatives to resist rot and water damage. It is a reliable choice, commonly used in boat construction, where constant exposure to water is a given.
3. Fiberglass-Reinforced Panels:
Fiberglass-reinforced panels, also known as FRP panels, offer an ideal solution for aquatic installations. These panels consist of a fiberglass-reinforced plastic surface that is highly resistant to water, chemicals, and impacts. They are lightweight, easy to install, and provide excellent adhesion for tiles. FRP panels are commonly used in swimming pools, water features, and other similar applications.
Consult a Professional:
When undertaking an underwater or submerged installation, it is advisable to consult with a professional who specializes in waterproofing and aquatic installations. They can assess your specific project requirements and recommend the most suitable solution for your needs. A professional can also ensure proper installation procedures are followed, minimizing the risk of future issues and ensuring a successful and long-lasting installation.
While traditional backer board is not recommended for underwater installations due to its limited water resistance, there are alternative solutions available that are specifically designed for aquatic environments. Waterproof membranes, marine-grade plywood, and fiberglass-reinforced panels offer durable and reliable options for creating a waterproof substrate for tile installations. Consult with a professional to determine the best solution to ensure the success and longevity of your underwater project.