ACQ Treated Wood
Goodfellow Terra®
A sustainable, natural and modern choice for your outdoor design
Since 2004, wood treated with quaternary alkaline copper (ACQ), azole copper (CA-B) or micronized copper azole (MCA) has replaced the old CCA-treated wood, which is now prohibited for residential projects. These new treatments, which are significantly less toxic, offer excellent protection against rot, insects and fungi, while being more environmentally friendly.
A modern, safe and sustainable solution
Used in residential, commercial and recreational projects, ACQ treated wood represents the perfect balance between performance, aesthetics and ecological responsibility. It is known for its robustness, durability and compatibility with all types of outdoor landscaping, whether it is a deck, a fence, a patio or even a dock.

Why choose Goodfellow Terra® treated wood?
- Safer: arsenic-free, less toxic, suitable for residential environments
- Refractory to termites, fungi and mold
- Natural aesthetics: now tinted a warm brown (Terra finish), it offers a softer and more elegant look than the old green shade
- Durability up to 40 years, with proper maintenance
- Compatible with all types of exterior design
- Environmentally friendly: certified processing, reduced ecological footprint
Ideal applications
ACQ / CA-B / ACM treated wood is used in a wide variety of projects:
- Residential: decks, fences, stairs, patios, siding
- Commercial & public: walkways, walkways, parks, rest areas
- Recreational: floating docks, lookouts, play structures
- Landscaping: low walls, paths, flower boxes

Thanks to its water-repellent properties, this wood is ideally suited to humid environments and can even be used in areas in contact with fresh water.
A natural, renewable and affordable material
Treated wood remains a classic in outdoor design. Its affordable cost, natural origin and longevity make it a popular solution for both modest and high-end projects.
At Patio Design, we carefully select the best ranges of treated wood, including Goodfellow Terra®, to design aesthetically pleasing, durable layouts that are perfectly adapted to the Quebec climate. We serve the greater Montreal area, including the South Shore and the North Shore.
in short
- Arsenic-free treatment, proven for more than 15 years
- Resistance to degradation, insects and moisture
- Natural brown tint for harmonious integration into the landscape
- Eco-friendly option with low environmental impact
- Excellent value for money for a durable and aesthetically pleasing material

Goodfellow Terra®
Eco-friendly and sustainable treated wood for outdoor use
Natural beauty. Long-lasting performance. Reduced impact.
Designed for your residential or commercial outdoor projects, Goodfellow Terra® treated lumber offers an exceptional combination of durability, safety and environmental friendliness. Thanks to the patented MicroPro® technology, this advanced treatment effectively protects the wood against fungal decay and insects while reducing its ecological footprint.
Next-generation processing technology
Goodfellow Terra® is pressure-treated with innovative MicroPro® technology, a water-based process that inserts copper in micronized form into the wood, without the use of solvents. This approach provides long-term protection against termites and fungi while meeting the highest environmental standards.
✔ Solvent-free
✔ formulation Less corrosive than traditional
✔ treatments Meets building codes for outdoor uses
A versatile solution for your outdoor projects
Goodfellow Terra® wood is suitable for many exterior applications, including:
- Decks, fences and patios
- Freshwater docks and landscaping
- Commercial and residential structures
- Uses in contact with the ground or submerged in fresh water
Each board is backed by a limited lifetime warranty (residential use) against fungal decay and termites. For more details, see our [Official Warranty].
An eco-responsible choice
Goodfellow Terra® is certified as an environmentally preferable product by Scientific Certification Systems, thanks to its low environmental impact. It is also UL GREENGUARD Gold certified, confirming that it emits very few volatile organic compounds (VOCs).
🌍 Its environmental footprint is less than half that of traditional residential treated wood.

A warm appearance, inspired by exotic woods
During processing, the wood is infused with a natural brown pigment that enhances its grain and gives it a warm appearance similar to that of tropical woods. This rich color lasts for 2 to 3 years, depending on exposure, before fading naturally to a patinated gray tone.
To maintain the look of the wood, it is recommended to apply a water-repellent finish or stain as soon as the wood is dry to the touch. A matching sealant is also available for cuts and drillings. See our care guide for more information.
Compatible with modern materials
Thanks to its low corrosiveness, Goodfellow Terra® wood is compatible with standard metal fasteners for outdoor use. It can also be used in direct contact with aluminum elements, as long as prolonged sources of moisture such as immersion in standing water are avoided.
Avoid:
- Encapsulation or wrapping of wood with aluminum in humid environments
- Applications exposed to standing water (docks, spas, swimming pools)

in short
✔ Solvent-free, low-impact
✔ MicroPro® technology Ideal for decks, patios, fences, docks and outdoor
✔ structures Superior colour retention to standard
✔ Treated wood Lifetime residential warranty against cavities and insects
✔ Certified eco-friendly and safe for sensitive environments (schools, offices, etc.)



























