What is the Difference Between 4/4 and 8/4 Lumber?
At first glance, words like 4/4 lumber and 8/4 lumber can be confusing if you're new to woodworking or purchasing wood for a project. Although they both reflect wood thicknesses, it's crucial to understand the differences in order to select the appropriate size for your project.
To put it easily, these measurements are an important part of the North American system of dimensional lumber sizes, particularly for hardwood lumber. Hardwoods are usually measured in quarters of an inch, in comparison with construction lumbers (such as 2x4s).
Here’s what that means:
4/4 lumber (read “four-quarter”) = Before finishing, it was around 1 inch thick.
8/4 lumber (read “eight-quarter”) = Before finishing, it was around 2 inches thick.
Although the actual thickness will be somewhat less after planing and finishing, the quarter method provides woodworkers with a standard language for understanding lumber sizes.
Understanding 4/4 Lumber
The most popular hardwood thickness is 4/4 lumber. In raw, it is roughly 1 inch thick, and after surfacing (planing), it is roughly 13/16". That’s why it’s great for projects such as:
Furniture
Cabinet doors
Drawer fronts
Shelving
4/4 lumber is frequently the first option for both professionals and hobbyists due to its availability and flexibility. This size is popular for lumbers due to its cost-effective, easy to machine, and paints well.
Understanding 8/4 Lumber
However, 8/4 lumber is twice as thick, measuring around 2 inches when rough cut and 1-13/16" after planing. When durability and strength are crucial, or when the task needs thicker stock for cutting and shaping, this size is utilized.
Common uses for 8/4 lumber include:
Table legs and chair legs
Workbenches
Mantels and stair treads
Large furniture parts requiring stability
8/4 hardwood lumber is typically more expensive due to its thickness, but it offers greater possibilities in terms of turning, sculpting, and cutting. It is preferred by many woodworkers who wish to make furniture that is both durable and of classic quality.
Comparing 4/4 vs. 8/4 Lumber
Let’s break down the main differences:
In general, choose 4/4 if you require thinner boards for panels or cabinetry. 8/4 lumber is a preferable option if you wish to form bigger pieces or need heavy-duty material for furniture bases.
Dimensional Lumber Sizes and Where to Buy
It's important to remember that hardwood and softwood can have different dimensional lumber sizes. Hardwood is sold using the quarter system (e.g., 4/4, 6/4, 8/4), whereas softwood (like pine) is usually offered in nominal sizes (e.g., 2x4).
The majority of the building lumber at a major retailer like 84 Lumber is softwood. When it comes to specialty hardwood lumber, such walnut, cherry, maple, or poplar wood, you should look for lumber suppliers who provide exact lumber proportions for excellent woodworking.
Conclusion
4/4 and 8/4 lumber mainly differ in thickness. While 8/4 lumber is heavier and more appropriate for heavy-duty furniture or woodworking requiring strength and shaping flexibility, 4/4 lumber is the standard size for common woodworking tasks like panels and cabinetry.
Knowing lumber sizes helps you to choose the best option for your project, whether you're purchasing from a huge source like 84 Lumber or a specialty hardwood store. Additionally, you can choose the ideal wood for longevity, aesthetic appeal, and affordability with choices like poplar wood lumber and other hardwoods.
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