Elite QandA


Is ground contact lumber more expensive?


  1. Is ground contact lumber more expensive?
  2. How long will ground contact pressure treated wood last?
  3. How can you tell if lumber is ground contact?
  4. What is the best lumber for ground contact?
  5. Is ground contact lumber the same as pressure treated?
  6. Is Cedar rated for ground contact?
  7. What is the difference between pressure treated and ground contact?
  8. How long will a treated 4x4 post last in the ground?
  9. Can you stain ground contact wood?
  10. Is Ground Contact lumber good?
  11. Do I need ground contact lumber for deck?
  12. Which is Better pressure treated or ground contact?
  13. Can ground contact wood be buried?
  14. How do you stop a rotting post?
  15. How long does ground contact cedar last?
  16. Is Redwood OK for ground contact?
  17. Is ground contact lumber safe for vegetable gardens?
  18. What is the green stuff on pressure treated wood?
  19. Should you let pressure treated wood dry before building?
  20. How long will a pressure treated 4x4 post last in the ground?
  21. Is it better to stain or paint pressure treated wood?
  22. Can you stain pressure treated wood immediately?
  23. Should fence post be set in concrete?
  24. What wood does not warp?
  25. Is cedar OK for ground contact?
  26. What lasts longer treated lumber or cedar?
  27. Which lasts longer cedar or redwood?
  28. Does red wood turn GREY?
  29. What is the best wood to use for raised garden beds?
  30. Is it OK to use pressure treated wood for raised garden?

Is ground contact lumber more expensive?

Ground Contact UC4A lumber is slightly more expensive than Above Ground UC3B lumber, but it can be used in all components of the deck. Using ground-contact lumber throughout your project may also provide peace of mind, since it's well-protected from rot and pests.

How long will ground contact pressure treated wood last?

about 40 yearsHow long will pressure treated wood last in the ground. The life expectancy of pressure treated wood in the ground is about 40 years before it begins to rot.

How can you tell if lumber is ground contact?

Treated lumber is clearly stamped as such. Look for stamps that indicate ground contact levels. If it's stamped L-P22, it contains arsenic, is designed for direct contact with the ground and is the most toxic variety. If it's stamped ​L-P2​, it's slightly less toxic and not designed for direct contact with the ground.

What is the best lumber for ground contact?

Cypress wood is the best choice for underground use. Its natural resistance against moisture makes it perfect for below-ground use.

Is ground contact lumber the same as pressure treated?

Pressure-treated wood is softwood lumber, typically southern yellow pine, that's been chemically treated to resist rot, decay and termites. Lumber treated to “Ground Contact” has a high chemical retention level and can be placed directly on or in the ground with better protection against rot or decay.

Is Cedar rated for ground contact?

cedar, pressure-treated wood is the sturdier and more weather-proof of the two. It's highly resistant to insect attack and rot, and special versions rated for “ground contact” can be buried in soil and will continue to shrug off decay for decades.

What is the difference between pressure treated and ground contact?

Pressure-treated wood is softwood lumber, typically southern yellow pine, that's been chemically treated to resist rot, decay and termites. Lumber treated to “Ground Contact” has a high chemical retention level and can be placed directly on or in the ground with better protection against rot or decay.

How long will a treated 4x4 post last in the ground?

A treated 4×4 will last 20 to 25 years in the ground if the conditions in the soil and climate are favorable. That number could increase to 40 to 75 years if you install the treated 4×4 in a cement ring rather than the soil. There are a few factors that influence how long the 4×4 can last in the ground.

Can you stain ground contact wood?

Primarily consisting of southern yellow pine, pressure treated wood is required by many building codes in retaining walls, ground contact lumber and other exterior wood projects. Staining pressure treated wood can help decks, fences and more to look better and last longer.

Is Ground Contact lumber good?

Lumber treated to “Ground Contact” has a high chemical retention level and can be placed directly on or in the ground with better protection against rot or decay. There has been an amazing new change to all treated wood to help out everyone, from the Weekend Warrior to the General Contractors.

Do I need ground contact lumber for deck?

According to their latest recommendations, Ground Contact should be used when: Wood will come in contact with soil, vegetation, leaf litter, and debris that can hold moisture for extended periods of time. You don't expect good air circulation, especially on the underside and between decking boards.

Which is Better pressure treated or ground contact?

Ground-contact pressure-treated lumber can be used either above ground or in contact with the ground. Has twice the level of chemical retention and protection compared to above-ground treated wood. Must be used when lumber is less than 6 inches from the ground or has poor ventilation.

Can ground contact wood be buried?

Pressure-treated wood is softwood lumber, typically southern yellow pine, that's been chemically treated to resist rot, decay and termites. Lumber treated to “Ground Contact” has a high chemical retention level and can be placed directly on or in the ground with better protection against rot or decay.

How do you stop a rotting post?

How You Can Protect Your Wooden Fence Posts From RottingWet Rot Vs. Dry Rot. Choose Rot Resistant Wood. Dry the Fence Posts Out. Consider Adding Posts to Concrete. Apply Preservative to the Wooden Post. Consider Staining Your Wood. Start Digging. Fill Up the Hole.

How long does ground contact cedar last?

In outdoor structures that are not in contact with the ground, such as decks, gazebos, pergolas and fence boards, cedar may last 30 years or longer. When in contact with the ground, such as when it's used for fence or support posts, it can last between 15 and 20 years.

Is Redwood OK for ground contact?

The characteristics of redwood make it a popular choice for outdoor applications. Yet even though redwood is more resistant to decay, it will eventually succumb to rot.

Is ground contact lumber safe for vegetable gardens?

Modern Pressure-Treated Lumber According to the American Wood Protection Association and the U.S. Environmental Protection Agency, lumber treated with ACQ is safe for garden use. Its durability and nontoxicity make it among the best woods for raised garden beds.

What is the green stuff on pressure treated wood?

Why is some treated wood green? The green color you see on treated wood is caused by chemical reactions that take place between the preservative components and the wood. Copper is still the most widely used element in wood preservatives and creates a green color on the wood.

Should you let pressure treated wood dry before building?

The first tip for working with pressure-treated lumber is to let it dry before using it. Other woods such as redwood and cedar are dry when you buy them. But lumber that has been treated has been injected with massive amounts of chemicals and water. These pieces have less water content and will be ready to use sooner.

How long will a pressure treated 4x4 post last in the ground?

How Long Will A Treated 4×4 Last In The Ground? (Explained) A treated 4×4 will last 20 to 25 years in the ground if the conditions in the soil and climate are favorable. That number could increase to 40 to 75 years if you install the treated 4×4 in a cement ring rather than the soil.

Is it better to stain or paint pressure treated wood?

For similar reasons, wet lumber can hinder how well paint adheres to the wood, but the added problem of the preservatives in pressure-treated wood makes it difficult for the paint to bond, this is why it's advisable to stain pressure-treated wood instead of paint, as painting requires additional preparation.

Can you stain pressure treated wood immediately?

Recently, pressure treated lumber will have a high moisture content and may take several weeks to dry. Staining pressure-treated wood is ineffective if the wood is still wet. Kiln-dried wood will be dry at purchase and can be stained immediately.

Should fence post be set in concrete?

Do Fence Posts Need To Be Set in Concrete? No, fence posts don't need to be set in concrete, and there are plenty of other ways to fix your posts if this feels a bit too permanent. If you are using wooden posts, concrete may actually be the worst option.

What wood does not warp?

RedwoodRedwood. For the best control over shrinking and warping, redwood is the king for two reasons. It has both the straightest grain pattern and a chemical inside the wood similar to tannin, which protects it against moisture infiltration and rot.

Is cedar OK for ground contact?

Due to its chemical properties, cedar is naturally weather-resistant and repels most bugs. Don't put cedar where it's in direct contact with the ground or set it in concrete. It may last for a while, but eventually it will rot and deteriorate.

What lasts longer treated lumber or cedar?

Cedar is stronger and more durable than pressure-treated lumber. Pressure-treated lumber can warp and weather within a few years if left untreated, while cedar is more capable of naturally keeping its shape.

Which lasts longer cedar or redwood?

Durability of Redwood vs Cedar Fence Redwood Fencing is measurably stronger than cedar – by about 23%. Redwood is therefore more durable than cedar.

Does red wood turn GREY?

Color Changes Due to Weathering As time goes on, this darkening may be rinsed away by rain and the redwood will weather-bleach to a soft driftwood gray. Instead, the wood will gradually turn a silvery tan, becoming lighter in color as the natural weathering continues.

What is the best wood to use for raised garden beds?

CedarCedar and redwood are naturally water-resistant but can be expensive and hard to find. Hemlock, fir and pine are suitable materials for raised beds but aren't very long-lasting. Pressure treated lumber is an option. Pressure treated lumber has been a controversial topic for many years.

Is it OK to use pressure treated wood for raised garden?

Modern Pressure-Treated Lumber According to the American Wood Protection Association and the U.S. Environmental Protection Agency, lumber treated with ACQ is safe for garden use. Its durability and nontoxicity make it among the best woods for raised garden beds.



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