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What Kind of Plywood for Boat Floor & How to Install

Written by J. Harvey / Fact checked by S. Numbers

what kind of plywood for boat floor

Your boat floor replacement materials like aluminum, fiberboard, and plywood lead to optimal function. It’s really important to know what kind of plywood for boat floor is durable and resists the outdoors.

These reviews of the best plywood for boat floor provide the factors you need to consider. These include the marine plywood for boat floor, and

  • The types and features of plywood for boat deck, floor, and other surfaces
  • The steps in installing and replacing boat floor

Boat owners prefer these top-notch boat floor replacement plywood products. Read on to learn more about them.

The Types of Plywood for a Boat Floor


Nowadays, high-quality plywood or plyboard products are widely used and available in the market to install or replace boat floorings. Understand each boat floor plyboard type, factors and features for effective use, and prolonged lifespan of your boat flooring.

Here are the main types and features of boat floor plyboards you need to be aware of:

1. Boat Floor Plywood Types

  • Marine-Grade Boat Floor Plyboard

These are primary boat flooring materials for uniform strength and moisture-resistance, next to aluminum and fiberboard. They are manufactured to be sturdy for a variety of use and to withstand rough water environments.

This plywood type features perpendicular-built thin sheets that provide maximum strength and complete waterproofing qualities. They include “boiling-water-proof” plywood or BWP variants that are the most preferred versatile marine plywood. Though much pricier than marine plywoods, boat owners invest in BWP boards for an impenetrable, long-lasting use.

  • Pressure-Treated Boat Floor Plyboard

Pressure-treated plyboards have reinforced planks built with high-durability plywood materials from softwoods that easily absorb moisture. The ply sheets become durable once they are mechanically injected with the chemical formulation.

These fire-treated ply sheets make enable solid boards to withstand the impact of extreme environments and prolonged weight loads. They deal with rotting, molding, and termite harborage effectively.

Thus, this type of plyboard is the best for use without direct water and high-moisture interaction. These plywood variants usually come with a water-resistant coating to neutralize the damaging effects of a marine environment.

  • Fire-Treated Boat Floor Plyboard

Technically, this is pressure-treated plywood that is also a fire-resistant boat flooring material. The treatment process of using pressure and fire by injecting a preservative strengthens the boards’ planks.

You can make a plyboard pressure-treated and fire-retardant coated and it can still absorb moisture. Though it can catch fire, the boards seem to prevent combustion, which normally happens when fire hazards are present in motorized vehicles. This pressure-treated plywood variant is especially helpful for boat flooring that bears gas fuels.

  • Exterior-Grade Boat Floor Plyboard

This is a good alternative to marine plyboards bearing its name for superior-quality external use. It provides solutions for frequent exposure to extreme weather and fresh and saltwater environments.

Most exterior-type plywoods are best-used as boat flooring materials to cope with prolonged outdoor periods. Though visually free of damages and imperfections, the use of waterproof sealants and phenol glue reinforce the planks.

Its bonding components make it tough for external use and suitable for a longer lifespan. This variant is not a “marine-rated” plyboard like the “boiling-water resistant” or BWR brands used in home furnishings.

2. Boat Floor Plywood Features

  • Product Availability

Recent technology advancements transform regular softwoods into solid plywood materials for boat flooring purposes. It increases the stability and strength of boat interiors and exteriors in the boating industry.

To replace other products, which are available but a bit expensive to use, plywood variants are handy in maintaining lightweight and optimal functions. Boaters and boat builders ideally choose hardwood materials like oak for their water-resistant, flexibility, and durability.

However, their difficult bonding applications and expensive procurement make them fade and favor the use of boat floor plyboards.

  • Ease of Use

These plywood materials are easier to cut, use, and polish than non-plywood brands requiring some set of special tools. It is quick to prepare them using basic power tools and hand-operated cutting equipment or hand saws.

Even fiberglass, fiberboard, and aluminum boats require plywood boat flooring materials. Marine-rated plywoods are used alternately as substrate and matting materials to quickly reinforce boat interiors and floors of marine vessels.

Boat flooring plyboards are made of the highest-grade materials for long-term ease of use in both wet and dry environments.

  • High-Quality of Materials

These boat flooring plywood products are popular in the marine industry for their specialized features, such as superior bending. They function like non-wood materials in terms of appearance, waterproofing, mold resistance, among other attributes.

These plywoods ensure long-term flexibility and durable use while posing no damages to the environment, people, and the boat itself. Despite varying and extremely rough outdoors that cause moisture formation on boat floors, it lasts long providing hassle-free boating.

Consider the industry or manufacturer recommendations when choosing the right plyboards for your boat flooring to fit your marine escapades.

How to Install and Replace Boat Floors


Step 1: Measure the standard size of your boat flooring

Always calculate your boat flooring needs starting from your budget. Draw your plans according to the scale and every step of the boat floor project.

Factoring in the standard size of your boat floor enables you to maximize your plywood materials. It can guide you in selecting the best marine-grade plywood for the customization process.

The board length, stack depth, and bending ability of the plywood need to match the boat dimension or footage. Doing this will help you get high-accuracy preparations and standard-sized marine plywood, as well as minimize wastage.

Step 2: Check Your Boat Flooring Capacity

Always consider the weight capacity or load-bearing factors of your boat floor. The number of people and other weight-load considerations affect the kind of plywood material your need to buy.

One primary component you need to take on your plywood is its thickness to carry the intended loads. When you desire your boat to carry over a dozen people plus the needed supplies, thicker plyboards are the best options. For smaller load-bearing requirements, get the practical ones. The more weight capacity added the thicker your boat floor should be.

Step 3: Install Or Replace Your Boat Flooring Plywood Of Choice

Once you’re certain of your boat floor’s standard size and weight-load capacity, do the preparations: laying out your replacement materials, fitting them, and cleaning all the surfaces.

Use a pressurized water hose to separate the accrual of dirt and molds and quickly spot rotting sections. You can mix an equal mixture of wood cleaner into your water and spray them onto the deck or floors. Include scrubbing down debris, rinsing, and sanding all areas for the installation or replacement job.

Step 4: Waterproof the plywood of your boat flooring

Installing and replacing your boat floor are easy if you follow the DIY tips and manufacturer recommended practices. Bonding and sealing to make your plywood waterproof is another job.

Overcoating your boat flooring with epoxy paints ensure it becomes highly impervious from water. To prevent further costs, do not forget to prepare the base or core and other layers of your plywood boat floor. It is necessary to apply a coating or sealing to prevent moisture formation on the pores of your plywood planks.

Step 5: Regular Checks And Cleaning Of Your Plywood Boat Flooring

Consistent cleaning and regular checks guarantee that the flooring of your boat is up to par at all times and under any weather condition. Proper cleaning includes checking the state of your plywood floors to maintain their integrity.

Regularly vacuum and sweep the boat floors with a soft broom or brush to loosen debris, stains, and dirt build-ups. Doing routine checks and clean-up every day prevents grease, grit, and marine deposits from staining or scratching the floor. Always use recommended cleaners, waxing, and protectants to preserve the core material and coating of your boat floor.

Check this YouTube video for more information on the best type of plywood to install on your boat floor, and this article to find the detailed guide to replacing the boat floor.


Make your boating safe and convenient with the information you have learned from this post on “What kind of plywood for boat floor materials?” Using marine-rated, pressure-treated, or exterior-grade plyboards make every boat floor serviceable under any weather.

U Looking for the right plywood to install or replace your boat flooring can be daunting at some point. Consider the types, factors, and features to simplify the selection process, and use the unbiased tips from these reviews to protect your boat, friends, and the marine environment from false plywood products.

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