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Pressure Treated Decking Prices

A new deck is a substantial investment to home and property. It is important to know and understand the overall costs of decking materials prior to a project so the homeowner can create a reasonable cost estimate. Whether a homeowner decides to tackle a deck project independently or hire a professional contractor, there are a few factors to consider. 

The Costs

  • 2' x 6' x 8' pressure-treated lumber: $5.30 to $7.10 per board


When getting ready to plan a new deck, keep in mind what materials are needed for a successful project. Some contractors use the same brands of materials so that the quality of the deck or project has a successful outcome. One of the greatest expenses of a deck will be the pressure-treated lumber. Pressure-treated lumber is often used in decking projects because it is coated with chemical preservatives that allows it to resist corrosion and warping. 

There are several different types of lumber that is used for pressure-treated decking such as:

Douglas Fir

One of the more common types of wood used for pressure-treated decking is Douglas fir. It is readily available within the U.S. making it an affordable choice. Douglas fir is resistant to warping and splitting like other woods. A durable wood, the Douglas fir is a great choice and solid investment for any deck project—big or small.


Hem fir is common with treated lumber for decks but it does have some drawbacks. The biggest one is that it is a weaker wood and can split easily, especially if the deck is being placed in the direct sunlight. In many cases, the hem will have to be replaced frequently throughout the life of the overall deck.

Ponderosa Pine

Ponderosa is a more flexible wood choice that is commonly found in the Northern U.S. Sometimes more expensive, it is not a good choice for a high-traffic deck or a deck that will be holding a lot of weight including a hot tub or concrete garden ornaments. 

Southern Yellow Pine

One of the most common decking choices for treated lumber, the Southern Yellow Pine is a strong and sturdy choice among builders. Perfect for framing and finishing—the Southern Yellow Pine does very well pressure-treated. 

While pressure-treated decking is resistant to many weather conditions such as rain, snow and damage from UV rays, it still has to be maintained frequently. A weather-resistant sealant helps create an additional layer of protection and it also keeps the chemicals from the treated lumber from leaching out onto the surface. The pressure-treated decking protects the wood from the inside out. Adding an exterior sealant helps protect the wood from further chipping and staining. It also helps prolong the life of the decking and adds shine and texture to the deck’s exterior 

Other factors to consider when determining cost or a budget is the fasteners and miscellaneous supplies that go into the deck construction. Choosing stainless steel fasteners may raise a homeowner's budget, but depending on the brand, they may last beyond the lifetime of the deck. This will ensure the homeowner is making a solid investment into their pressure-treated deck package.


Using pressure-treated decking allows the homeowner or consumer to expand the overall life of their outdoor decking project. Pressure-treated decking can be used on various facets of the overall project, such as:

  • The deck base

  • Railings

  • Banister

  • Posts

  • Stairs

  • Trim

Pressure-treated wood acts as a barrier to protect the wood from rotting both on the inside and the outside. For example, untreated wood can cause several problems with the outcome of the project. If moisture seeps into the deck piece, mold and rotting can occur. It also opens up the possibility of becoming infested with insects, including ants or termites. Insect infestations can destroy a deck in days. Untreated wood may also begin to warp or bend as the moisture reshapes it. This can lead to an uneven surface and even cause nails and fasteners to pop or fall out. 

Having a pressure-treated deck will allow the homeowner to have peace of mind when entertaining or using their deck area. Knowing that the posts and beams are protected from the elements will reduce the risk of the wood buckling or breaking once weight is applied. Having a solid deck allows the homeowner to treat their outdoor area like part of their home—something they are proud to use and show off to others. 


The biggest advantage to using pressure-treated lumber on a deck and other outdoor projects is that the deck will last longer than most other types of wood. Pressure-treated wood is fairly economical and the average homeowner or consumer can expect to build a deck starting around $7.00 per square foot. This means for a modest 100 square foot deck with pressure-treated lumber, the average consumer can consider to have about $934.00 in materials. This price varies, depending on location within the U.S. and if the homeowner hires a contractor to help with any part of the building process. Not having to replace decking materials in the future is a huge long-term cost savings. As long as the deck is maintained and a sealcoat is applied annually to avoid the wood from drying out, a pressure-treated deck can last in upward of 10 years or longer. 


While there are several advantages to a pressure-treated deck, there is one big disadvantage. Because the wood is treated chemically, it can cause some health issues. Never directly breathe in the fumes of the wood. When cutting or trimming, always do so in a well ventilated area—such as outside. Wear protective coverings such as eyewear, gloves and a mask. Pressure-treated lumber often contains a variety of chemicals including CCA or chromate copper arsenate that includes arsenic, copper and chromium. When disposing of or tearing down and older deck with pressure-treated lumber, treat it as a hazardous material. Homeowners and construction workers must dispose of properly at their local recycling center that handles hazardous construction materials. 

The overall cost of using pressure-treated wood is an economical way to build a long-lasting deck on any property. This is a cheaper alternative to specialty hardwoods that are untreated and require several coatings to properly seal and preserve. A deck is an excellent investment to any home and increases overall property value.

Last updated on Apr 21, 2014

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