A composite decking purchase order should contain more than a product name, quantity, and price. It should clearly explain what the buyer expects the composite decking supplier to manufacture, pack, inspect, and deliver.
Composite decking products can vary in profile, size, surface treatment, color, length, structure, and installation system. Therefore, a short or unclear purchase order may lead to incorrect boards, mixed colors, missing accessories, unsuitable packaging, or installation problems.
A detailed purchase order also protects both parties. The buyer receives a clear inspection standard, while the supplier receives accurate production instructions.
This guide explains what importers should include in a composite decking purchase order before confirming production.
1. Buyer and Supplier Information
Start the purchase order with complete buyer and supplier information.
The document should include:
- Buyer’s legal company name
- Buyer’s registered address
- Buyer’s contact person
- Email address
- Telephone number
- Supplier’s legal company name
- Supplier’s registered address
- Supplier’s contact person
- Purchase order number
- Purchase order date
The legal company names should match the names used on the commercial invoice, packing list, shipping documents, and payment records.
In addition, the buyer should assign a unique purchase order number to every order. This number helps both parties identify the correct production records, payment documents, inspection reports, and shipping files.
If the buyer places repeat orders, the purchase order number also prevents confusion between different shipments.
2. Product Name and Product Code
The purchase order should clearly identify every composite decking product.
Do not use a general description such as “outdoor decking boards” without additional information. Instead, include the exact product name and supplier product code.
For example:
- Co-extrusion composite decking board
- Traditional WPC decking board
- Hollow composite decking
- Solid composite decking
- WPC joist
- Aluminum joist
- Starting clip
- Plastic installation clip
- Stainless steel clip
- Fascia board
The buyer should also include the supplier’s model number or internal product code.
Product codes help the composite decking supplier connect the purchase order with production drawings, molds, samples, packaging labels, and warehouse records.
If the buyer uses its own SKU system, the purchase order can show both codes:
- Supplier model number
- Buyer SKU number
This method reduces mistakes during production, receiving, and warehouse management.
3. Board Profile and Internal Structure
Composite decking boards may have similar external dimensions but different internal structures. Therefore, the purchase order should clearly describe the board profile.
The buyer should confirm:
- Hollow or solid structure
- Number of hollow holes
- Round-hole or square-hole design
- Wall thickness
- Side-groove design
- Top and bottom surface structure
- Reversible or single-sided design
If the order includes hollow decking boards, attach the confirmed cross-section drawing.
The drawing should show:
- Overall width
- Overall thickness
- Hollow-hole shape
- Hollow-hole size
- Internal support walls
- Side-groove position
- Side-groove depth
A clear profile drawing helps prevent the supplier from using a similar but incorrect mold.
This point becomes especially important when a supplier manufactures several boards with the same width and thickness.
4. Board Dimensions
Every WPC decking order should include complete dimensional requirements.
The purchase order should show:
- Board length
- Board width
- Board thickness
- Side-groove dimensions
- End-cut requirements
Use millimeters rather than general descriptions.
For example:
- Width: 140 mm
- Thickness: 25 mm
- Length: 2,900 mm
If the order contains several board lengths, list each length on a separate line.
| Product Model | Width | Thickness | Length | Quantity |
|---|---|---|---|---|
| SL-D14025 | 140 mm | 25 mm | 2,900 mm | 2,000 pcs |
| SL-D14025 | 140 mm | 25 mm | 3,600 mm | 1,000 pcs |
Separating the lengths reduces counting and packing errors.
The buyer should also confirm whether the supplier may provide boards slightly longer than the ordered length for final cutting at the project site.
5. Dimensional Tolerances
The purchase order should not only show the nominal dimensions. It should also refer to the agreed manufacturing tolerances.
Composite decking production may involve small dimensional changes because of material composition, extrusion temperature, cooling conditions, and cutting accuracy.
Therefore, the buyer and supplier should agree on acceptable tolerances for:
- Length
- Width
- Thickness
- Straightness
- Side bending
- Twisting
- Side-groove dimensions
The purchase order can refer to:
- An approved technical data sheet
- A confirmed product drawing
- A signed quality specification
- A mutually agreed inspection standard
For example:
Product dimensions and tolerances shall follow the approved drawing and technical specification attached to this purchase order.
Avoid adding tolerance values that the supplier has not reviewed. Otherwise, the purchase order may contain requirements that normal production cannot consistently achieve.
Both parties should confirm the tolerance standard before mass production begins.
6. Surface Treatment and Wood-Grain Pattern
Composite decking boards can use different surface treatments. The purchase order should specify the exact finish.
Common surface options include:
- Sanded surface
- Brushed surface
- Grooved surface
- Embossed wood grain
- 3D embossed wood grain
- Online embossed surface
- Co-extrusion wood-grain surface
- Mixed surface design
The buyer should also confirm whether the board has:
- The same surface on both sides
- Different surfaces on each side
- One usable surface
- Two usable surfaces
If the order includes embossed decking, attach a clear surface sample or approved photo.
However, photos alone may not accurately show texture depth. Therefore, importers should approve a physical sample before production whenever possible.
The purchase order should identify the approved sample number or confirmation date.
7. Product Color
Color is one of the most common sources of disagreement in composite decking orders.
Terms such as “brown,” “grey,” or “teak” may describe many different shades. Therefore, the buyer should not rely only on a color name.
The purchase order should include:
- Color name
- Supplier color code
- Buyer color code, if applicable
- Approved physical color sample
- Sample confirmation date
- Batch requirements
For example:
Color: Teak, supplier color code TK-03, according to the approved sample confirmed on July 20, 2026.
If the buyer needs all boards for one project, the purchase order should request production from the same batch whenever possible.
However, buyers should also understand that composite materials may show minor color variation. The supplier should explain the normal color range before order confirmation.
For large projects, the buyer may request several pre-production boards for final color approval.
8. Material and Product Type
The purchase order should state the required product type.
For example:
- Traditional wood-plastic composite decking
- Capped composite decking
- Co-extruded composite decking
- Solid composite decking
- Hollow composite decking
If the project requires a specific material formulation, the buyer should refer to the approved technical specification instead of using an unclear general statement.
The specification may include:
- Wood fiber content
- Polymer type
- Additives
- Surface protective layer
- Recycled material requirements
- Density range
However, many suppliers treat exact formulations as confidential production information. Therefore, importers should focus on measurable performance requirements rather than requesting every formula detail.
The purchase order can refer to agreed test results, technical data sheets, or product samples.
9. Product Performance Requirements
If the project has specific performance requirements, include them in the purchase order or an attached technical specification.
Depending on the application, the requirements may cover:
- Flexural strength
- Water absorption
- Slip resistance
- Weather resistance
- UV resistance
- Impact resistance
- Surface wear
- Fire performance
- Formaldehyde or restricted substance requirements
- Thermal expansion
- Load performance
The buyer should also specify the test standard and acceptable result.
Do not write only “high quality,” “waterproof,” or “UV resistant.” These descriptions are too general for technical inspection.
Instead, refer to a confirmed technical data sheet, laboratory report, or project requirement.
For example:
Product performance shall comply with the approved technical data sheet attached to this purchase order.
This approach gives the supplier a measurable production target.
10. Order Quantity and Unit of Measurement
The purchase order should clearly show the order quantity for every product.
Possible units include:
- Pieces
- Linear meters
- Square meters
- Packages
- Pallets
- Sets
For composite decking boards, pieces and linear meters usually provide the clearest production quantity.
Square meters can help estimate project coverage. However, square-meter calculations may vary according to installation gaps and board width.
Therefore, the purchase order should show both the physical quantity and estimated coverage when necessary.
For example:
- Quantity: 2,000 pieces
- Board size: 140 × 25 × 2,900 mm
- Total linear meters: 5,800 m
- Estimated coverage: approximately 780 m²
The buyer should also state whether the quantity allows a small production overage or shortage.
If no variation is acceptable, write this clearly before production.
11. Installation Accessories
A composite decking system normally requires more than decking boards.
The purchase order should list all required accessories separately, including:
- WPC joists
- Aluminum joists
- Plastic clips
- Stainless steel clips
- Starting clips
- Stainless steel screws
- Expansion screws
- Fascia boards
- Edge boards
- End caps
- Corner trims
- Cover strips
For each accessory, include:
- Product name
- Model
- Material
- Size
- Color
- Quantity
- Packaging unit
The buyer should also confirm that the clips match the board side grooves and that the screws match the clips and joists.
A practical purchase order may require the supplier to complete an installation fitting test before shipment.
For example:
The supplier shall test the approved clips, screws, joists, and decking boards together before packing.
This simple requirement can prevent major installation delays.
12. Packaging Method
Packaging requirements should appear directly in the composite decking purchase order or in an attached packaging specification.
The buyer should confirm:
- Number of boards per package
- Number of packages per pallet
- Pallet material
- Pallet size
- Protective film
- Woven bags
- Cartons
- Corner protection
- Board-end protection
- Strapping method
- Waterproof protection
- Maximum pallet weight
- Maximum pallet height
If the goods require forklift handling, the pallet structure should allow safe loading and unloading.
The buyer should also consider warehouse conditions and local transport requirements. For example, weak pallets may break during repeated handling after arrival.
Meanwhile, excessive packaging may increase costs and waste.
Therefore, the buyer and supplier should agree on a practical packaging method before production.
13. Packaging Labels and Shipping Marks
The purchase order should define the information that appears on bundle labels, cartons, and pallet labels.
A composite decking packaging label may include:
- Buyer name
- Supplier name
- Purchase order number
- Product code
- Product model
- Board dimensions
- Board length
- Color
- Quantity
- Batch number
- Pallet number
- Gross weight
- Net weight
- Country of origin
If the buyer uses barcodes or QR codes, provide the required format before production.
The purchase order should also state whether the supplier needs to use:
- Neutral packaging
- Supplier branding
- Buyer branding
- Private-label packaging
- Multilingual labels
Clear labels help the buyer complete receiving inspections, warehouse storage, order picking, and batch tracking.
14. Sample Approval Requirements
For a new product, new color, or customized profile, the buyer should approve a sample before mass production.
The purchase order should identify:
- Sample model
- Sample color
- Sample dimensions
- Surface type
- Approval date
- Approved person
- Sample reference number
If possible, both the buyer and supplier should retain the same approved sample.
The purchase order can state:
Mass production shall follow the approved sample. Any material change, color change, profile change, or surface change requires written buyer approval.
This clause prevents the supplier from changing important product details without confirmation.
However, the buyer should also define which document has priority if the sample and drawing contain different information.
15. Document Priority
A composite decking order may involve several documents:
- Purchase order
- Proforma invoice
- Product drawing
- Technical data sheet
- Approved sample
- Packaging specification
- Email confirmation
Sometimes these documents contain different information. Therefore, the purchase order should explain which document has priority.
For example:
- Signed purchase order
- Approved product drawing
- Approved physical sample
- Technical data sheet
- Supplier quotation
Alternatively, the buyer may state that the supplier must report any conflict before production.
For example:
If the purchase order, drawing, sample, or technical specification contains conflicting information, the supplier shall stop production and request written confirmation from the buyer.
This clause helps prevent the supplier from choosing the easiest interpretation.
16. Pre-Production Confirmation
Before mass production, the buyer may request a pre-production confirmation.
This step can include:
- Final product drawing
- Final color confirmation
- Packaging layout
- Label design
- Accessory list
- Production schedule
- Estimated loading quantity
For customized orders, the supplier may also provide a short pre-production sample.
The buyer should complete all confirmations in writing.
Verbal confirmation through a phone call may help communication, but it should not replace written records.
After the call, one party should summarize the final decision by email or message.
17. Quality Inspection Requirements
The purchase order should state how the buyer will inspect the goods.
Possible inspection stages include:
- Raw material inspection
- First-piece inspection
- During-production inspection
- Pre-shipment inspection
- Container-loading inspection
- Arrival inspection
The buyer should clarify whether:
- The supplier will conduct internal inspection
- The buyer will send an inspector
- A third-party inspection company will inspect the goods
- The buyer may inspect random samples
- The supplier must provide an inspection report
The inspection scope may include:
- Product quantity
- Dimensions
- Surface quality
- Color consistency
- Board straightness
- Side grooves
- Accessories
- Packaging
- Labels
The purchase order should also state when the supplier can pack or ship the goods.
For example:
The supplier shall not load the container until the pre-shipment inspection has been completed or waived in writing by the buyer.
18. Defect and Shortage Handling
The purchase order should define how both parties will handle missing goods, damaged products, incorrect products, or quality problems.
Possible solutions include:
- Replacement products
- Replacement accessories
- Additional goods in the next order
- Price discount
- Credit note
- Partial refund
- Local repair
- Transport claim
- Insurance claim
The purchase order may also define:
- Reporting period after arrival
- Required photos and videos
- Required batch information
- Required quantity records
- Whether damaged goods must remain available for inspection
Avoid using an unrealistic statement such as “the supplier shall be responsible for all damage after shipment.”
Transport damage may occur during sea freight, port handling, truck delivery, or unloading. Therefore, both parties should determine responsibility according to evidence.
19. Price and Currency
The purchase order should clearly show the unit price and total value.
For each product, include:
- Unit price
- Currency
- Quantity
- Total amount
The document should also clarify whether the price includes:
- Product packaging
- Pallets
- Labels
- Accessories
- Mold fees
- Sample fees
- Inspection fees
- Inland transport
- Export customs clearance
The currency should match the commercial invoice and payment agreement.
If the order contains several product categories, calculate the subtotal for each category.
Then, show the complete order value at the end of the purchase order.
20. Trade Terms
The purchase order should include the agreed Incoterm and named location.
Examples include:
- EXW Wuhu
- FOB Shanghai
- CIF Rotterdam
- DDP buyer’s warehouse
Do not write only “FOB” or “CIF” without a named port or destination.
The trade term affects:
- Inland transport responsibility
- Export customs clearance
- Freight booking
- Marine insurance
- Destination charges
- Import customs clearance
- Final delivery
Both parties should also confirm which Incoterms version applies.
Clear trade terms help prevent unexpected freight and destination cost disputes.
21. Payment Terms
The purchase order should clearly state the payment arrangement.
For example:
- 30% deposit and 70% balance before shipment
- 30% deposit and 70% after inspection
- Letter of credit
- Full payment before production
- Open account terms for approved customers
The document should also include:
- Payment currency
- Bank charges
- Deposit deadline
- Balance payment deadline
- Documents required before final payment
If the balance depends on inspection approval, explain the inspection process clearly.
The buyer should use the supplier’s verified company bank account and carefully confirm any bank account change.
22. Production and Delivery Schedule
The purchase order should show the expected production and delivery schedule.
Include:
- Deposit date
- Sample approval date
- Production start date
- Estimated completion date
- Inspection date
- Loading date
- Shipment date
The supplier should confirm whether the lead time starts after:
- Purchase order confirmation
- Deposit receipt
- Sample approval
- Packaging approval
Customized colors, profiles, packaging, and private labels usually require additional preparation time.
Therefore, the buyer should not calculate the production period only from the purchase order date.
23. Container and Loading Requirements
If the order will ship by full container, the purchase order should include basic loading requirements.
Confirm:
- Container type
- Estimated number of containers
- Maximum loading weight
- Loading method
- Pallet orientation
- Product separation
- Moisture protection
- Container photos
- Loading video
- Seal number record
If the order contains several colors, lengths, or models, the buyer may request a loading plan.
The supplier should place labels where warehouse workers can identify the products after opening the container.
In addition, the supplier should prevent heavy accessories from damaging the decking boards during transport.
24. Shipping Documents
The purchase order should list the documents that the supplier must provide.
Common documents include:
- Commercial invoice
- Packing list
- Bill of lading
- Certificate of origin
- Fumigation certificate, when required
- Product test report
- Inspection report
- Insurance document
- Export declaration documents
- Loading photos
- Container and seal records
The required documents depend on the destination country, payment method, customs rules, and contract terms.
Therefore, the buyer should confirm document requirements before shipment rather than after the vessel departs.
25. Change Control
After the buyer confirms the purchase order, neither party should change important details without written approval.
Changes may involve:
- Product model
- Dimensions
- Color
- Quantity
- Surface design
- Packaging
- Labels
- Accessories
- Delivery date
- Shipping method
The purchase order should require written confirmation for every change.
For example:
Any change to the product, quantity, packaging, price, delivery schedule, or shipping terms must receive written approval from both parties.
This requirement prevents confusion when different employees communicate through email, messaging applications, and phone calls.
26. Purchase Order Confirmation
After receiving the purchase order, the composite decking supplier should review every item.
The supplier should confirm:
- Product specifications
- Quantity
- Price
- Accessories
- Packaging
- Labels
- Lead time
- Payment terms
- Shipping terms
If any requirement is unclear or unavailable, the supplier should report it before accepting the order.
The buyer should request a signed or stamped purchase order confirmation.
This final confirmation shows that both parties understand the same production and delivery requirements.
Composite Decking Purchase Order Checklist
| Purchase Order Section | Information to Include |
|---|---|
| Company information | Buyer and supplier legal names, addresses, contacts |
| Order reference | Purchase order number and date |
| Product identification | Product name, supplier model and buyer SKU |
| Board structure | Hollow or solid profile, cross-section drawing |
| Dimensions | Length, width, thickness and side-groove size |
| Tolerances | Agreed dimensional and straightness tolerances |
| Surface | Brushed, grooved, embossed or co-extruded finish |
| Color | Color name, color code and approved sample |
| Performance | Agreed technical data and testing requirements |
| Quantity | Pieces, linear meters, square meters or pallets |
| Accessories | Joists, clips, screws and finishing parts |
| Packaging | Boards per bundle, pallet method and protection |
| Labels | Product code, dimensions, color, batch and pallet number |
| Samples | Approved sample number and approval date |
| Inspection | Inspection stage, scope and responsible party |
| Problem handling | Shortage, defect, replacement and claim process |
| Price | Unit price, total value and currency |
| Trade terms | Incoterm and named port or destination |
| Payment | Deposit, balance and payment deadline |
| Delivery | Production, inspection and shipment dates |
| Documents | Invoice, packing list, bill of lading and certificates |
| Change control | Written approval requirements |
| Confirmation | Buyer and supplier signatures or stamps |
Conclusion
A detailed composite decking purchase order gives both the importer and supplier a clear production standard.
Importers should define the product model, board profile, dimensions, tolerances, color, surface, quantity, accessories, packaging, labels, inspection requirements, payment terms, and delivery schedule before production begins.
In addition, the purchase order should refer to approved drawings, samples, technical data, and packaging specifications. If any document contains conflicting information, both parties should resolve the difference in writing before manufacturing.
A complete WPC decking order cannot eliminate every risk. However, it can greatly reduce specification errors, mixed products, missing accessories, packaging problems, delayed deliveries, and quality disputes.
Most importantly, the purchase order should remain clear, measurable, and easy to verify. This approach helps the composite decking supplier manufacture the correct products and allows the importer to complete a more efficient arrival inspection.
