Best Cement Board for Outdoor Use: Top Picks 2023

When it comes to outdoor construction and renovation, selecting the right materials is crucial for longevity and durability. One often overlooked component is the use of cement boards for various applications such as siding, flooring, and countertops. However, with numerous options on the market, choosing the best cement board for outdoor use can be an overwhelming task. This article aims to provide a comprehensive guide to help you make an informed decision.

First and foremost, it's essential to understand that not all cement boards are created equal. Each type is designed for specific purposes and has unique properties that make them suitable for particular applications. This guide will discuss the different types of cement boards, their features, and the ideal outdoor applications for each.

Types of Cement Boards for Outdoor Use

The primary types of cement boards include traditional cement board, exterior-grade plywood, and cement fiberboard (also known as hardie backer board). Each type offers unique advantages and considerations for outdoor use.

1. Traditional Cement Board: Traditional cement boards are crafted from a combination of cement, limestone, and recycled paper fiber. They offer excellent resistance to moisture and are suitable for applications such as flooring and countertops in outdoor kitchens or wet bars.

Advantages of Traditional Cement Board

a. Moisture Resistant: Traditional cement boards are designed to absorb minimal moisture, making them an excellent choice for outdoor applications prone to exposure to water and humidity.

b. Durable: Due to their high cement content, these boards are resistant to cracking, breaking, and other forms of physical damage. They are an ideal choice for heavy-duty outdoor projects.

Disadvantages of Traditional Cement Board

a. Weight and Bulk: Traditional cement boards are heavier and more considerable than other options, making them more challenging to handle and install. They may also require additional support structures to bear their weight.

b. Pricing: Cement boards with high cement content tend to be more expensive than other alternatives, adding to the overall cost of your project.

2. Exterior-Grade Plywood: Exterior-grade plywood is manufactured using water-resistant adhesives and a series of thin wood veneers pressed together. It's commonly used for outdoor decks, porches, and underlayments for outdoor tile installations.

Advantages of Exterior-Grade Plywood

a. Versatility: Exterior-grade plywood can be used for a wide range of outdoor applications and is easy to cut and shape to fit your specific project needs.

b. Economical: Plywood is generally more affordable than other cement board alternatives, making it an attractive choice for budget-conscious consumers.

Disadvantages of Exterior-Grade Plywood

a. Moisture Absorption: While exterior-grade plywood is designed to resist water damage, it can still absorb moisture over time, leading to warping, rotting, or delamination.

b. Lack of Fire Resistance: Plywood is not fire-resistant and may not be suitable for applications near outdoor fire features or in regions with a high risk of wildfires.

3. Cement Fiberboard: Cement fiberboard is made from a combination of cement, sand, and recycled wood fiber. It's highly resistant to moisture, fire, and pests, making it an ideal choice for outdoor siding, countertops, and other exterior applications.

Advantages of Cement Fiberboard

a. Moisture and Fire Resistance: Cement fiberboard offers excellent resistance to moisture and fire, making it a safe and durable choice for outdoor applications.

b. Pest Resistant: The combination of cement and wood fiber makes cement fiberboard resistant to damage from termites, rot, and other pests.

Disadvantages of Cement Fiberboard

a. Installation Difficulty: Cement fiberboard can be heavier and denser than other options, making it more challenging to install. It may also require additional tools or equipment to cut and shape.

b. Environmental Impact: While the manufacturing process for cement fiberboard is considered less harmful to the environment than traditional cement board production, it still has a higher carbon footprint than other alternatives.

Installation and Care Tips for Outdoor Cement Boards

Regardless of the type of cement board you choose, proper installation and care are crucial for maximizing its lifespan and performance.

1. Prep Your Surface: Ensure the surface upon which you're installing the cement board is clean, flat, and structurally sound. If installing over an existing surface, remove any old material, and make any necessary repairs before proceeding.

Installation Techniques

a. Furring Strips: For wall applications, attach furring strips horizontally to the studs to create a gap between the wall and the cement board, allowing for proper moisture drainage and ventilation.

b. Stud to Stud: For floor applications, lay the cement board directly on top of the joists, attaching it to the studs for added support and stability.

Care and Maintenance

a. Sealing: Apply a suitable sealant or paint to protect the surface of your cement board from moisture and other elements, enhancing its lifespan and appearance.

b. Regular Inspection: Inspect your cement board installations regularly for signs of damage, such as cracks, warping, or water marks. Address any issues promptly to prevent further damage or deterioration.

In the outdoor living space, durability and low maintenance are crucial factors when selecting the best cement board for your project. By understanding the different types of cement board materials available and their ideal applications, you can make an informed decision that will stand the test of time. So, go ahead and transform your outdoor space into a haven that's both functional and beautiful, using the perfect cement board for your needs.