Different Grades of Pressure Treated Lumber
Pressure-treated wood is available in many types and shapes. It is great for outdoor usage and most homeowners prefer treated wood for furniture. Pressure-treated lumber helps to keep the outdoor structures looking attractive for years because of its rot resistance property. However, few people are unaware of pressure-treated lumber’s advantages and its properties.
For construction of wood structures, high-quality timber is used and the timber supplier in India is one of the renowned suppliers of imported timbers.
Although the wood substance is the same, pressure-treated lumber is unique in various ways. The use of treated lumber varies from application to manufacturing.
What does Pressure-treated Lumber mean?
Pressure-Treated Lumber Varieties
Pressure-treated lumber comes in four different types. Generally, a tag is attached to each piece of lumber to identify its type and usage.
The four different varieties are as follows:
Above-ground pressure-treated lumber
This kind of lumber is utilized in applications that are maintained or replaced. The surface of the application should be at least 6 inches above the ground level and should be well aired and drained.
However, the Above-ground pressure-treated wood is for projects that meet the below requirements:
Above the ground
Quickly dries in wet conditions
Not in a tropical environment
Ground Contact pressure-treated lumber
The Ground Contact treated lumber has direct contact with the soil and these woods can be utilized above ground or in direct contact with the ground. The chemical retention and protection provided by this lumber is much more than that of above-ground treated wood.
It can be used in conditions where wood preservation is difficult.
In-Ground contact pressure-treated lumber
The lumber used in In-Ground applications has more retention levels than other pressure-treated lumbers. Because when the lumber is in contact with the ground the deterioration level is more. Therefore In-Ground contact pressure-treated lumber is used for constructing critical structures with exposure to groundwater and utility poles.
Marine-Grade Plywood
Marine-grade plywood is more durable than other lumbers because of the pressure lamination and waterproof glue. It is treated with high heat and the gaps in between the plywood are filled with glue that prevents it from twisting and deteriorating.
Pressure-Treated Lumber Comes in Various Grades
There are five different grades of pressure-treated lumber: Premium, select structure, Grade 1, Grade 2, and Grade 3.
Premium Grade
Premium grade pressure-treated lumber is a well-designed premium product with more attractions. It’s the most loved product by retail customers.
Select Structure
Select Structure is the second in the grades of pressure-treated lumber and is the most durable and long-lasting product. It has a grain slope of 1 in 12 with seasoning checks and well-spaced knots.
There’s a knothole present every 4 inches in the wood.
Grade 1 or Construction Grade
The lumbers with grade 1 are more durable than grades 2 and 3. It is also known as construction grade lumber because of its uses in all applications of home building. Although it has the same structure as that of other grade lumbers, grade 1 lumber is more stable.
Grade 2 or Standard Grade
The grade 2 pressure-treated lumber has more knots and imperfections than grade 1 lumber. The outer face of the lumber has a finishing that looks like a premium one but the wood grain contains a peeling edge.
It is mostly used in the construction of load-bearing structures with a visual quality having 43% translucent.
Grade 3 or Utility grade
Grade 3 pressure-treated lumbers have more knots, cracks, and holes present in it. It is mostly used in light building, packaging, and shipping where the soles and knots may not be visible. Also, the grade 3 or utility grade lumber is not as strong as other grade lumbers and therefore is used for light frame applications.
Pressure-Treated Lumber Comes in Various Grades
The lumber supplier in India is the only supplier of high-quality imported pressure-treated lumber in India. Pressure-treated lumber is treated with a chemical solution to preserve it from insects, mold, and mildew. Each of the grades and types of pressure-treated lumber has different application uses. It is a product in itself with several benefits over other types of lumbers.