Marine plywood is one of the many types of plywood that are available on the market today, but it is a premium selection when it comes to moisture, humidity or water retention as compared to traditional plywood products. The differences between marine plywood and traditional plywood will greatly impact your choice for building material in addition to your project’s overall longevity and expense.
Let us understand what distinguishes marine plywood from standard plywood.
Understanding the Basics of Plywood
To accurately evaluate marine vs. standard plywood, you must first understand how both kinds of plywood are constructed. Both types consist of thin wood veneers (plies) that are adhered together with heat and pressure. These plies are arranged in an alternate grain direction to provide additional strength and stability.
All of the twos types manufacturing production techniques are comparable, but the quality of the raw materials and adhesive that are used in their construction may differ significantly from each other resulting in a substantial difference in their overall performance and functionality.
What Marine Plywood Is
Marine plywood is an engineered plywood product specifically manufactured to perform excellently under high moisture and humid environments. Marine plywood is made from high quality hardwood veneer and is glued together with waterproof adhesives, making it hard for it to delaminate when in contact with water.
The construction of marine plywood is more precise than standard plywood and goes through stricter quality control, resulting in fewer gaps and imperfections within the core layers. These factors all contribute to the reliability of marine plywood in demanding applications.
Major Differences Between Marine and Regular Plywood
1. Waterproof Snap
The single biggest difference between marine plywood and regular plywood is their waterproof ability. Marine plywood uses waterproof adhesives which are normally of a higher quality than regular plywood’s adhesives, so they cannot separate in the presence of moisture.
Regular plywood can use lower quality adhesives, which leave it susceptible to damage from moisture.
2. Quality of Wood Veneers
Marine plywood is made up of a more selective grade of the wood used to create the wood veneer. It is stronger, more dense, and will not move as much as a defect-free wood veneer would.
Regular plywood uses a combination of softwoods and/or have minor defects in their wood veneer. All of which could affect the overall strength and durability of a piece of plywood.
- Core of Marine Grade Plywood
The most notable aspect of marine grade plywood is its void-free core. The composite layers inside have been laminated tightly together with no holes created by the laminated pieces that may trap moisture or weaken the board.
Most conventional plywoods typically have voids or butt joint overlaps within their cores, leading to a reduction in the integrity of the material over time; particularly in moist areas.
- Strength/Durability
Marine grade plywood, because of its superior quality materials and the way it is constructed, has good long lasting strength and durability, allowing it to support heavy loads and resist bending under pressure, which is especially important for high-demand projects.
Whereas, conventional plywood is also fairly strong, it may not be able to withstand heavy loads and stresses, and can do poorly in challenging environments.
- Resistance to the Elements
Marine grade plywood is resistant to moisture and also to temperature fluctuations and harsh environmental conditions, which can result in swelling, cracking, and fungal growth.
Conventional plywood may exhibit very similar characteristics but may degrade at a much faster rate, resulting in an increased need for maintenance or replacement.
What Marine Grade Plywood Can Be Used For
Marine grade plywood’s increased properties allow it to be used in many different applications, particularly those requiring a high degree of durability and moisture resistance.
Some examples include:
Bathroom and Kitchen Using marine grade plywood can help areas that are frequently exposed to moisture since it will stop the material from constantly swelling and deteriorating.
Cost Versus Value of Marine Plywood
The truth is that marine plywood is generally more expensive than standard plywood however it can be a better long term choice than standard plywood when you compare the total cost of ownership (i.e. considering how long you will use the material). This means that because marine plywood lasts longer, doesn’t damage easily, and requires less maintenance, it can save you money as far as total cost of ownership is concerned. For example, if you use marine plywood instead of standard plywood for all your projects, you will likely have fewer repairs and replacements over time, which could result in savings.
How to Choose Marine Plywood
If you are considering the use of either marine or standard plywood for your project, here are some tips on choosing the best plywood for your needs:
- Environment: Determine if your plywood will be located in a humid or wet environment and whether the plywood will require special moisture-resistant features.
- Quality: Make sure that you choose plywood with even layers, a smooth surface, and a solid core.
- Application: Use marine plywood for heavy-duty applications while using standard plywood for indoor applications.
- Longevity: Make sure that you choose plywood with the longest expected useful life for critical applications.
Summary
Marine plywood provides a high precise solution for projects where wood will experience wet conditions, experience heavy traffic, as well as impacted by more severe environmental conditions than those found in a typical commercial environment.
When debating between the various grades of marine plywood, or other types of plywood, it is essential to make an informed decision based on the needs of your project, and how long you want your project to perform without sacrificing quality. Manufacturers who have invested decades in the production of high-performing boards remain focused on producing materials that are made to meet required specifications for strength, consistency, and sustainability standards.