Marine-grade plywood and Pressure Treated Plywood have a slight difference. They are made from different wood materials and by different processes. Both plywood used for different applications.
It is very important to have the right plywood for the right project or else your project may get spoiled. In this post, we will know what are the differences between marine grade plywood and pressure-treated plywood and also know which is better for your application.
Difference between marine plywood and pressure-treated plywood
|#||Marine Plywood||Pressure Treated Plywood|
|Surface||Both sides smooth surface.||Both side rough surfaces|
|Bending Capacity||Not bent more than 18mm.||It can be bent more than 18mm.|
|Weight||It is always heavier than Pressure Treated Plywood.||It is lighter than marine plywood.|
|Knots||A / A grade does not have knots, whereas in B / B grade there are presents some knots.||Knots are presents.|
|Void and Gaps||There are no void and gaps between their veneers sheet.||Voids and gaps are present between the veneers sheet.|
|Number of layers||Marine plywood has a minimum of 9 to 11 thin veneers sheets.||The exterior plywood consists of 5 or 7 veneers sheets|
|Quality veneers||The Marine Plywood is made from Douglas fir or Western Larch.||Pinewood is used|
|Standard||Marine-grade plywood follows BS 1088 Standard.||Not sure|
|Price||Its price is always higher than the Pressure Treated Plywood.||The price of this plywood is always less than the marine plywood.|
Marine Plywood is perfect to use in humid and wet conditions and resists delaminating and fungal attack. Marine-grade plywood primarily uses for those applications, where moisture is present for a long time. Marine plywood is often used to making boats, boat parts, docks, bathroom doors, and kitchen platforms.
Marine-grade plywood is made from high-quality veneer sheets of Western Larch or Douglas-fir. Marine is made by gluing 9- 11 solid veneers sheets together.
Marine plywood is not produced by the chemical treatment process, So we can also use it for kitchen and indoor purposes. It is not harmful to plywood humans.
Both sides of plywood are smooth, The smooth surface prevents moisture and dust from entering and makes the plywood more durable.
- The Glues
Resorcinol is used to make marine grade plywood marine grade because it is the best waterproof adhesive to waterproof marine grade plywood.
Pressure Treated Plywood
Pressure-treated wood is the wood of choice when projects need to be protected from moisture and decay.
Most people use Pressure Treated Plywood for outdoor projects. The term “pressure-treated” refers to a chemical process that makes the plywood more durable. The chemical is mechanically injected inside the plywood. So that plywood can be saved from termite and insect damage, fungal damage, bacteria weather damage. While pressure-treated plywood can still be damaged.
- The Glues
Polyurethane Glue is used to make Pressure Treated Plywood. It works well in moisture. This glue characteristic makes this product a great choice when assembling projects made from pressure-treated plywood.
Why is Marine Grade Plywood Better?
Nothing better than marine plywood for marine and exterior applications. It is more durable. It is costlier than regular plywood and pressure-treated plywood due to its excellent properties.
Improving marine plywood depends on many things. Improving marine plywood depends on many things such as veneer sheets, glue, and the right way to make it. For marine application, Marine-grade plywood is a good choice
Marine plywood doesn’t have as voids as regular plywood, which makes it structurally stronger.
So we see Marine-Grade Plywood vs Pressure Treated Plywood. Pressure Treated and Marine Plywood have their own properties. If your project budget allows for marine plywood cost and your project is a marine application. So it would be better to use marine-grade plywood.
Applications made from marine grade plywood are very durable compare to other plywood in moisture conditions.