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Is WBP plywood suitable for external use?

Jim Brown

Is WBP plywood suitable for external use?

WBP plywood can be used as exterior grade plywood for construction. There are those who say that WBP plywood is the only plywood which should be used for exterior sheathing, due to its weather resistance.

What is WBP exterior grade plywood?

WBP plywood is an exterior grade so long as it is treated with a preservative. WBP (weather and boil-proof) means that the glue line will not break down when subjected to adverse weather conditions, and can also withstand immersion in boiling water.

Will plywood hold up outside?

Exterior plywood Exterior plywood is a weather-resistant kind. Since it is meant to be used outside and exposed to every sort of weather elements, it is made stronger, and its layers are glued together using waterproof glue. It is also not easily damaged by water and other weather elements.

Can Marine Ply be used externally?

Marine plywood can be used for all the jobs which can be done by exterior plywood . General exterior plywood is intended for indoor or outdoor application where resistance to weather/water is required .

Which plywood is best for exterior use?

Plywood is available in many different types of wood, various thicknesses and in a wide range of quality and price points. For exterior projects or projects exposed to weather conditions, you need to use plywood that is suited for those conditions. Your best choices are either ACX or marine grade plywood.

How long will untreated plywood last outside?

Weather mixed with direct sunlight can damage wood quickly and if left untreated it can happen in a matter of weeks. Untreated wood can last anywhere from a couple of months to over two years. If you are searching for a long term project you might want to stick with treated wood or make sure you treat it yourself.

How long will marine ply last outside?

Marine grade plywood can last anywhere from ten years to more than twenty-five years, depending on the quality and grade of the plywood and how the plywood is used.

How long will plywood last outside?

For instance, pressure treated plywood has a life expectancy of about 20 years while MRF and OSB have an expected life of around under 30 and up to 60 years. The marine grade plywood even has a life-time guarantee in the United States.

What happens if you use interior plywood outside?

Its layers are glued together with waterproof adhesive that prevents them from delaminating in wet weather. If you use interior plywood outdoors, it won’t be long before the corners of the sheets separate, and eventually the plywood will become spongy and disintegrate.

Is it true that WBP plywood absorbs water?

The plywood has gone up and today it absolutely chucked it down with rain and I noticed that the plywood that they have used for the job seems to have absorbed a lot of water (dark stain patches appeared after it rained). I thought WBP plywood would not absorb any water, am I wrong?

Where do you find WBP stamp on plywood?

As for checking the grade, all construction plywood sheets (i.e. those without a fancy show veneer face) have a grading stamp somewhere on the face, normally in one corner, which identifies the mill and grade of plywood and there will be the legend “WBP” or “Exterior grade” clearly visible.

What are the grades of exterior plywood for outdoor use?

It comes in 3/4-, 5/8- and 1/2-inch thicknesses. Appearance stamps on plywood range from cabinet-grade (A) to construction grade (C and D). Exterior plywood carries an X stamp, which identifies it as suitable for use outdoors. Beside CDX, you can also find better grades, such as ABX, ACX and even BCX.

Is WBP plywood suitable for external use?

Jim Brown

Is WBP plywood suitable for external use?

WBP is the most durable glue you can find. In descending order of durability, the other glue classes are Boil-Resistant (BR); moisture-resistant(MR); and interior(INT). According to the FAO of the United Nations, properly formulated WBP plywood is the only plywood recommended for exterior use.

Is WBP plywood the same as marine plywood?

WBP plywood can be used as exterior grade plywood for construction. The difference between WBP and standard marine plywood is that marine plywood is guaranteed 100% void free, without any knotholes and cracks, while other WBP plywood may not be.

What grade is WBP plywood?

In plywood, WBP stands for Weather and Boil Proof, the category of glue used to make the most durable plywood. WBP glues are made with melamine or phenolic resin. To be considered exterior grade or marine grade, plywood must be made with WBP glue.

Which plywood is best for exterior use?

Plywood is available in many different types of wood, various thicknesses and in a wide range of quality and price points. For exterior projects or projects exposed to weather conditions, you need to use plywood that is suited for those conditions. Your best choices are either ACX or marine grade plywood.

What is the difference between marine plywood and exterior plywood?

Exterior plywood is about ¾” thick and contains five plies of plywood with a fibreglass layer on its surface. Marine grade plywood has a similar thickness but comprises 9-11 plies of wood.

Which plywood should I use?

If you need plywood for roofing, walls or subfloods, then choose construction plywood or OSB. Oak or birch hardwood is good for cabinets, storage and furniture.

How long will treated plywood last outside?

For instance, pressure treated plywood has a life expectancy of about 20 years while MRF and OSB have an expected life of around under 30 and up to 60 years. The marine grade plywood even has a life-time guarantee in the United States.

What kind of glue does WBP plywood use?

The WBP plywood is one of the most durable plywood. Its glue can be melamine or phenolic resin. To be considered exterior grade or marine grade, plywood must be produced with WBP glue. The best WBP plywood should be made with a phenolic bond.

What does WBP stand for in plywood category?

In the plywood industry, the term WBP stands for Weather and Boil Proof rather than Water Boil Proof. This is a very common mistake made by even professionals. Water boiling proof is easy to be. Many standard price glued plywood can easily pass 4 hours water boiling or 24 hours if the board is pressed well.

What kind of plywood is best for exterior use?

According to the FAO of the United Nations, properly formulated WBP plywood is the only plywood recommended for exterior use. China made WBP plywood is used outdoor such as house building, shelters & covers, roof, container flooring, concrete shuttering, etc.

What is the thickness of weather proof plywood?

If you have previously specified or purchased WBP (weather and boil-proof) or Exterior quality plywood for construction purposes, you should now specify plywood to comply with EN636, Class 3. Got a question about plywood? We stock a wide range of plywood at all our merchant branches in thicknesses ranging from 3.6mm to 25mm.