The Similarities Between Marine Plywood and Exterior Plywood
Before we get into the details of what separates these Plywood cousins, it’s important to acknowledge their similarities. The most obvious similarity is that both Marine Plywood and Exterior Plywood are designed to be used externally. Both products utilise an A-bond glue, allowing them to stand strong in the face of all the unique challenges that come with being used in the unpredictable outdoors.
Marine Plywood
While the A-bond glue used in Exterior Plywood makes it similar to a Marine Plywood, there is so much more going on under the hood that the comparisons actually start to look a little bit silly. Firstly, to be classified as a Marine Plywood, the product needs to meet strict standards. Regardless of whether it’s British Standard or Australian Standard, a Marine Ply needs to go that extra mile to actually receive the “marine” title officially.
The summary version is that:
there must be absolutely no core-gaps,
the veneers used must be of the highest quality,
the glue needs to be waterproof. Without just one of these factors present a Plywood cannot be considered marine grade.
Another large difference is aesthetic quality. Marine Plywood options, the aesthetic quality is significantly higher than what you would find in an Exterior Grade Plywood. This difference is why we often see customers using Exterior Plywood for something like a trailer, or various storage applications where appearance isn't important. In comparison, Marine Plywood will be often used for its stunning looks to create magnificent boats, as it strikes a balance between the strength and water-adaptive qualities and the visual qualities.
Exterior Plywood
A big difference that Exterior Plywood offers is that it comes in three different sheet sizes, allowing for greater flexibility when building. Because of this, our Hardwood Exterior Plywood is a good choice when you need an exterior product, but don’t necessarily need something Marine Grade. As mentioned, a Marine Ply has to be knot free in order to get its official classification, but with Exterior Plywood you can find knots of up to 1 and a half inches present! Similarly, you can also find core gaps present, although they do have to be under an inch wide or the Ply will lose its exterior grading.
