What Is Difference Between Marine Plywood & Underlayment Plywood?
The quality of plywood is based on the amount and size of irregularities like voids and patches in the wood and the quality of its veneer. Regular pressure-treated plywood is adequate for certain projects, but for others higher-quality marine plywood may be necessary. Does this Spark an idea?
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Quality
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Pressure-treated plywood underlayment often warps heavily just from the heat and moisture involved in the process of making it. The manufacturing process also delaminates some of the wood and sometimes utilizes water-repellents that can impede bonding, making it hard to glue or paint the board. Marine plywood, in contrast, is stronger, stiffer, more stable and has less potential to check, or split, with less patches, smaller voids and a higher quality veneer.
Uses
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Boat builders use marine plywood because regular underlayment plywood is not of good enough quality to securely handle the water, pressure and other demands placed on a boat. For similar reasons, while regular plywood is acceptable for building most homes, it is ill-advised for those situated near the ocean. In many homes, builders use marine plywood in kitchens and bathrooms, especially for flooring, where temperature and moisture levels tend to be higher.
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Cost-Efficiency
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Marine plywood is more expensive than regular exterior plywood but easier to maintain. Filling voids and knots in poorer quality plywood could cost more in materials and time than building with marine plywood from the outset.
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References
- Photo Credit a typical boat of venice image by agno_agnus from Fotolia.com
