Is Plywood Waterproof? Unpacking Myths and Choosing the Right Panel for Wet Areas

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By Afshi

When selecting materials for construction or renovation, one common question arises: Many people wonder if plywood is waterproof. This query is particularly relevant to bathrooms and kitchens or any other undertaking that is bound to encounter moisture at one point or another. By having an understanding of the properties of plywood and the different varieties in the market, one can be able to make a good decision.

Understanding Plywood and Its Properties

Plywood is also a manufactured board made from thin layers or “plies” of wood veneer assembled with each successive layer positioned at an angle of 90° to the previous layer. This cross-graining process makes plywood strong and stiff hence its use in many constructional applications. But the thing with wood is it is sensitive to water once it has not been treated or selected appropriately.

Debunking the Myth: Is Plywood Waterproof?

The short answer to whether plywood is waterproof is: that they also pointed out that not all of the plywood is waterproof. In its natural state, wood is known to be permeable to water, therefore, standard plywood sheets are not waterproof. When exposed to moisture for a long time it can cause warping, swelling, and in the long run structural damage.

However, it is pertinent to note that there are special varieties of plywood, which are water-resistant. Marine plywood is coated with a water-resistant material that makes it resistant to water and can be used in water-exposed areas. This type of plywood is taken through a process of using water-resistant glue and is sometimes soaked with a chemical that prevents water from penetrating its surface.

Types of Plywood for Wet Areas

Selecting the most appropriate plywood to be used in areas with exposure to water requires the following information about the various types of plywood.

1. Marine Plywood: Composed of selected veneers and bonded with water-resistant glue, Marine Plywood is one of the most water-resistant types of plywood currently available. It is best used in the construction of boats and other watercraft but can also be applied in the construction of kitchens and bathrooms.

2. Boiling Water Resistant (BWR) Plywood: This type of plywood is prepared by using phenolic resins that give it water resistance. It is mostly applied for inside and outside furniture, cupboards in the kitchen, and wherever their moisture is met.

3. Boiling Water Proof (BWP) Plywood: With the abbreviation of marine grade, BWP plywood is the most resistant plywood to water. It is appropriate for harsh weather conditions and situations where the roller will be in direct contact with water most of the time.

Benefits of Using Waterproof Plywood

  • Durability: That is why waterproof plywood is stronger and it does not degrade by the influence of moisture within a short period.
  • Versatility: It can be applied on floors, walls, roofs, and furniture within a given house especially those that are in areas of high humidity.
  • Strength: The series of treatments that the plywood undergoes also improves its strength making it a desirable material in structural applications.
  • Aesthetic Appeal: Waterproof plywood comes in different surface finishes and can improve the aesthetic value of interior designs and usage.

Considerations When Choosing Plywood for Wet Areas

1. Type of Plywood: Make sure you get plywood that is treated specifically for water resistance; these are labeled BWR (boiling water resistant) or BWP (both boiling and water resistant).

2. Quality: When selecting plywood, it is recommended to buy better quality plywood from well-reputed manufacturers.

3. Treatment and Coating: See if the plywood has gone through a chemical treatment and/or has received a layer of water-resistant coating.

4. Cost: Somewhat pricier than traditional plywood, waterproof plywood still has many advantages and is quite worth the cost.

Applications of Waterproof Plywood: 

  • Bathroom and Kitchen Cabinets: Guaranteeing cabinets in these areas are capable of handling high humidity levels.
  • Outdoor Furniture: Making the equipment to be highly resistant to rain and humidity having the ability to last long.
  • Flooring and Roofing: To provide a stable surface that can also minimize the absorption of water.
  • Boat Building: Checking that the structure is capable of sustaining this exposure continuously.

Conclusion: 

CenturyPly emerges among the best in the market when choosing waterproof plywood. CenturyPly products include a diverse and durable plywood sheet and waterproof plywood which guarantees the sturdiness of construction and renovation projects. 

The company’s catalog consists of unique products resistant to moisture and perfectly designed to improve the appearance of the room. Leverage CenturyPly for panels that are guaranteed to be superior in quality and durability.

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