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Product Description

ACQ pressure-treated wood decking is outdoor lumber infused with Alkaline Copper Quaternary preservative to resist rot, fungi, and insect damage. Unlike older CCA-treated wood, ACQ contains no arsenic or chromium, making it safe for residential gardens, playgrounds, and pool areas. At Zhongyu Woodcraft, we’ve been manufacturing premium outdoor wood products since 1978, serving clients in over 30 countries with factory-direct wholesale pricing.

What Is ACQ Pressure-Treated Wood?

ACQ (Alkaline Copper Quaternary) is a water-based wood preservative developed in the 1990s as a safer alternative to CCA (Chromated Copper Arsenate). The treatment process places lumber in a pressurized vacuum cylinder, forcing the preservative deep into the wood fibers rather than merely coating the surface.

The copper component in ACQ protects against fungal decay and rot, while the quaternary ammonium compound (quat) provides insect resistance, particularly against termites and carpenter ants. Together, these ingredients create a durable, long-lasting outdoor wood product that requires minimal maintenance.

All our ACQ-treated decking meets AWPA (American Wood Protection Association) standards and is suitable for above-ground, ground-contact, and freshwater applications. We source FSC-certified timber from responsibly managed forests, ensuring both environmental sustainability and consistent quality.

Key Features and Specifications

Every batch of decking boards undergoes third-party testing to verify preservative retention and penetration depth. Our quality control team inspects each board for knots, splits, warping, and surface defects before packaging, ensuring you receive consistently high-quality lumber for every project.

Wood Species Comparison

Southern Yellow Pine is our most popular option for decking due to its excellent strength-to-weight ratio and ability to absorb preservative deeply. The wood’s natural resin channels allow ACQ to penetrate uniformly, providing consistent protection throughout each board.

For premium projects, Merbau (Intsia bijuga) offers exceptional density and natural oils that make it highly resistant to rot and insects even without chemical treatment. Its rich reddish-brown color weathers beautifully to a silver-gray patina over time, requiring only occasional cleaning to maintain its appearance.

Applications and Project Types

ACQ-treated wood is safe for use around edible gardens and children’s play areas because it contains no arsenic or chromium. Unlike CCA-treated wood, which was phased out for residential use in many countries, ACQ poses no risk of chemical leaching into soil or water supplies.

For commercial projects such as resort boardwalks and public park pathways, we recommend our heavy-duty 2×6 decking with hidden fastener systems for a clean, nail-free surface that reduces splintering and improves pedestrian safety.

Why Choose Zhongyu Woodcraft for Your Decking?

Our 8,000 square meter factory includes a dedicated treatment plant with two 15-meter pressurized cylinders, allowing us to process up to 50 cubic meters of lumber per day. This capacity ensures fast turnaround for large orders while maintaining consistent treatment quality across every batch.

We maintain an inventory of over 500 cubic meters of kiln-dried, ACQ-treated decking in standard sizes, ready for immediate shipment. For custom orders, our typical lead time is 15-25 days depending on quantity and specifications.

Frequently Asked Questions

Q: Is ACQ-treated wood safe for vegetable gardens and children’s play areas?

A: Yes. ACQ contains no arsenic or chromium, unlike the older CCA treatment. The active ingredients (copper and quaternary ammonium compounds) are widely recognized as safe for residential use, including edible gardens and playground equipment. The EPA in the United States and similar regulatory bodies worldwide have approved ACQ for all above-ground and ground-contact residential applications.

Q: How long does ACQ-treated decking last outdoors?

A: With proper installation and annual maintenance, ACQ-treated decking lasts 20-30 years in above-ground applications and 15-25 years in ground contact. The actual lifespan depends on climate, exposure to moisture, foot traffic, and maintenance routine. Merbau decking, with its natural density and oils, can last 30-50 years even in harsh coastal environments.

Q: What is the difference between ACQ and CCA treated wood?

A: CCA (Chromated Copper Arsenate) contains arsenic and chromium, which led to its phase-out for residential use in many countries starting in 2004. ACQ (Alkaline Copper Quaternary) replaces arsenic with a quaternary ammonium compound (quat), making it safer for residential applications while providing comparable protection against rot and insects. ACQ-treated wood has a slight greenish tint initially, which fades to a natural weathered gray over time.

Q: Do I need to seal or stain ACQ-treated decking?

A: Sealing or staining is optional but recommended to extend the wood’s lifespan and maintain its appearance. For the first 3-6 months after installation, allow the wood to dry completely before applying any finish. We recommend a water-repellent preservative or semi-transparent stain applied annually or every two years. Avoid film-forming finishes like paint, which can trap moisture and cause peeling on treated wood.

Q: What fasteners should I use with ACQ-treated wood?

A: Use hot-dipped galvanized (HDG) or stainless steel fasteners with ACQ-treated wood. The copper in ACQ is corrosive to ordinary steel and even electro-galvanized nails, which can stain the wood and fail prematurely. For premium projects, we recommend 304 or 316 stainless steel screws, particularly in coastal areas with salt air. Hidden fastener systems are also available for a clean, nail-free deck surface.

Q: What is your minimum order quantity for wholesale decking?

A: Our MOQ for standard decking is 100 square meters (approximately 1,076 square feet). For custom sizes or specialty wood species, the MOQ may be higher. We welcome both small custom orders and large container shipments. Volume discounts are available for orders over 500 square meters, and dedicated project management is provided for orders over 1,000 square meters.

Q: Can you provide custom lengths and pre-cut sizes?

A: Yes, we offer free custom cutting services for all decking orders. Provide us with your cut list or project plans, and we’ll pre-cut boards to your exact specifications, minimizing waste and reducing on-site labor time. We can also pre-drill screw holes, round edges, and apply pre-stain finishes for an additional charge.

Q: How do you package decking for international shipping?

A: All export orders are packaged in ISPM-15 certified heat-treated wooden crates with moisture barriers and corner protection. Boards are bundled by size and labeled with species, dimensions, and quantity. We handle all export documentation including commercial invoice, packing list, certificate of origin, and phytosanitary certificate if required by your destination country.

Get Your Wholesale Quotation

Ready to source premium ACQ pressure-treated decking for your next project? Contact us today for a free wholesale quotation with factory-direct pricing. Our team typically responds within 24 hours with detailed specifications, lead times, and shipping costs to your location.

For more information on outdoor wood maintenance, read our complete guide to protecting outdoor wooden furniture and structures, which covers cleaning, staining, and annual maintenance routines.

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Zhongyu Woodcraft – 48 Years Traditional Chinese Woodcraft Factory, Nationwide Installation