Harmony Home Improvement

Why Is My New Deck Green? Understanding The Nature of Pressure-Treated Lumber

When you decide to install a new deck, your first step will likely involve selecting the material that suits your preferences and needs. Many homeowners in New England opt for pressure-treated lumber for its durability and affordability. However, you might notice a green hue on your newly-installed deck. In this blog, we’ll explain why your new deck appears green and shed light on the benefits of pressure-treated wood.

What Is Pressure-Treated Lumber?

Pressure-treated lumber undergoes a process where wood is infused with chemicals to protect it from rot, insects, and moisture damage. The chemical preservative used in this process often gives the wood a greenish tint, explaining why your new deck is green.

Why Does My New Deck Look Green?

The green hue is mainly due to a chemical called Copper Azole. It’s a safe and effective preservative that protects your deck from fungal decay and termites. This hue typically fades over time, creating a more natural wood color.

Are The Chemicals In Pressure-Treated Lumber Safe?

Yes, the chemicals used are safe for general outdoor use. The Environmental Protection Agency has approved the preservatives used in pressure-treated lumber. However, like with any building material, certain precautions should be taken during handling and installation.

How Long Does The Green Tint Last on My Deck?

The green tint on your deck will usually fade within a few months, depending on your local weather conditions and the amount of sunlight your deck receives. As the deck is exposed to the elements, it ages gracefully into a beautiful gray hue.

How Can I Maintain My Pressure-Treated Deck?

We recommend regular cleaning and sealing to prolong your deck’s life. We have an informative blog on properly maintaining your deck, filled with tips and tricks to ensure your deck stays in excellent condition.

Can I Paint Or Stain My Green Deck?

Definitely! Once your deck has had time to dry thoroughly—generally about a year —you are free to add a personal touch to your deck. Staining or painting your deck not only allows you to alter its color to fit your aesthetic desires but also provides an additional barrier against weather conditions, further extending the life of your deck. It’s essential to remember that preparation is key for this process. Ensuring your deck is clean and dry will give the best result.

Moreover, choosing a high-quality stain or paint is crucial for the longevity of your deck’s appearance.

I’m Considering Other Decking Materials. What Are My Options?

While pressure-treated lumber is popular, other materials like composite decking (Trex and TimberTech are two popular brands)  and natural hardwoods offer unique benefits. Look at our comprehensive guide comparing decking materials for a more informed decision.

Is Pressure-Treated Lumber the Right Choice for My Deck?

Every home is unique, and your deck should be too. We can help guide you through the selection process to ensure your deck suits your style and budget. For more information, book a free consultation with our experts.

Best Deck Builder in Connecticut

We hope this blog has helped you understand why your new deck might look green and reassured you of the benefits of pressure-treated lumber. If you have more questions or need assistance with deck building or other home improvements, don’t hesitate to contact us at Harmony Home Improvement. Our team is ready and eager to assist you!


Book your free estimate online today!


Contact us via this website.


(860) 645-8899