Quality of plywood has generally been falling into the abyss for decades. ACX will do the trick for a quick and dirty boat, upon which you will place little value or trust. The use of ACX is very poor economy, in my opinion. My labor is by far, the more expensive portion of the construction of any boat.
These standards specify minimum requirements for sizes, grades, specialty panels, manufacturing tolerances and glue bond quality. Both Douglas Fir and Canadian Softwood Plywoods are manufactured in several grades. The grades are dependent upon the appearance and the quality of the veneers used for the outer plies.
Hydrotek Marine Plywood is manufactured utilizing BS 1088 specifications, it is a multiply type construction, with balanced internal plys and thick (1mm before sanding) face veneers, and water proof phenolic glue. It is made using a stiff and strong wood specie which when put together, yield a very good quality marine panel.
Knowing that a difference in marine grade plywood exists and how it will effect the project you are working on is key to getting the best plywood product.
For instance, if a plywood will be exposed to considerable moisture, marine plywood would be the best choice. However, for kitchen cabinets, interior plywood would be fine, as there's no reason to spend the extra money that plywoods with waterproof glue would cost.
To be suitable for marine construction, panels must be made with waterproof glue and marked as exterior plywood (EXT) or marine plywood. As a general rule for boatbuilding, use marine-grade plywood for planking because the wood used to make it is of higher quality with smaller voids and fewer patches.
Marine Plywood Grades. In order to be a Marine Grade the plywood has to conform to a certain number of criteria: The Glue MUST be waterproof; Voids are to be avoided; Face and inside veneers have to be good; Here is a Youtube video about making Marine Plywood.
Chesapeake Plywood provides wholesale Marine Plywood from a variety of the top plywood manufacturers. We only source from the top Marine Plywood manufactures to ensure that we are providing you with the very best quality of wholesale Marine Plywood that is available.
Even though the plywood products sold by most hardware stores are graded A, B. C. and D (with A being the best), they aren't considered as high quality as marine and other types of quality hardwood plywood. Standard plywood is made with fewer, thicker layers and mostly contains softwood, like pine or Douglas fir.
Best part is the price which is well below the cost of other types of plywood. CDX - Another type of construction sheathing that might work okay for rough shop projects, like work tables and storage.
And whether best quality plywood is birch, poplar, or pine. There are 16,150 best quality plywood suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Vietnam, and Ukraine, which supply 85%, 12%, and 1% of best quality plywood respectively.
Aircraft plywood is available in thicknesses of 1 ⁄ 8 inch (3 mm) (3 ply construction) and upwards; typically aircraft plywood uses veneers of 0.5 mm (approx 1/64 in) thickness although much thinner veneers such as 0.1 mm are also used in construction of some of the thinner panels.