2x6 vs 2x8 Decking: Which is Right for Your Project?

When it comes to building a deck, one of the most fundamental decisions you'll make is the size of the lumber to use. Two popular options are 2x6 and 2x8 lumber. But which one should you choose? Let's delve into the details to help you make an informed decision.

Before we dive in, let's clarify that the "2x" in 2x6 and 2x8 refers to the nominal size, not the actual dimensions. When you buy 2x6 lumber, it's actually 1.5 inches thick and 5.5 inches wide. Similarly, 2x8 lumber is 1.5 inches thick and 7.25 inches wide. Now, let's explore the pros and cons of each.

Strength and Durability

One of the primary factors to consider is the strength and durability of your deck. Here, 2x8 lumber has an edge. Due to its larger size, it can support more weight and is less likely to warp or twist over time. This is particularly important if you're planning a multi-level deck or one that will bear heavy loads, like a hot tub or a lot of furniture.

However, 2x6 lumber is still a robust option. It's more than capable of supporting a standard deck, especially if you're using joist hangers to connect the joists to the beam. It's also a good choice if you're looking to save some money, as 2x6 lumber is generally less expensive than 2x8 lumber.

Appearance

Another factor to consider is the appearance of your deck. 2x8 lumber can give your deck a more substantial, robust look. The wider boards can create a more solid, high-end feel. However, this can also make the decking feel more rustic or cabin-like, which might not be the aesthetic you're going for.

On the other hand, 2x6 lumber can give your deck a more modern, sleek look. The narrower boards can create a cleaner, more contemporary feel. This can be particularly appealing if you're going for a minimalist or modern design.

Cost

As mentioned earlier, 2x6 lumber is typically less expensive than 2x8 lumber. This is due to the fact that it takes less wood to make a 2x6 board than it does to make a 2x8 board. If you're on a tight budget, this could be a significant factor in your decision.

However, it's important to note that the cost of lumber can vary greatly depending on your location and the current market conditions. It's always a good idea to get quotes from a few different suppliers before making your decision.

Structural Integrity and Building Codes

In some cases, the size of your lumber may be dictated by building codes. Many areas require that decks over a certain size or height be built with 2x8 joists. This is to ensure the structural integrity of the deck and the safety of those using it.

Even if your local building codes don't require 2x8 joists, using them can provide an extra margin of safety. This is especially important if you're planning a large deck or one that will be used frequently.

Spanning Distance

One of the key factors in determining the size of your joists is the distance between them. The wider the spacing, the more likely you are to need 2x8 joists. This is because wider spacing requires more support to prevent the deck from sagging or bouncing.

As a general rule, you should not exceed 16 inches of spacing between joists. If you're planning to use wider spacing, you'll need to use 2x8 joists to provide the necessary support. However, it's always a good idea to consult with a structural engineer or your local building department to ensure that your deck is safe and up to code.

Ultimately, the decision between 2x6 and 2x8 lumber will depend on your specific needs, budget, and local building codes. Both options can provide a strong, durable deck, but 2x8 lumber may be the better choice if you're planning a large, heavy-duty deck. On the other hand, if you're looking for a more modern look or a budget-friendly option, 2x6 lumber might be the way to go. Whatever you choose, make sure to do your research and consult with a professional if you're unsure about any aspect of your deck build.