Outdoor Composite Fencing - 18, 20 and 22 mm Boards on 90 × 90 or 100 × 100 mm Posts

This is the outside boundary in board and post form. Boards come in 18, 20 and 22 mm, 20 mm as stock. Posts come in 90 × 90 and 100 × 100 mm, with the section chosen by exposure rather than panel height alone.

Thickness buys stiffness, not looks. A 22 mm board holds a longer edge and a wider bay than an 18 mm, and costs more per metre for the same face.

Outdoors the board meets four things: sun, water, ground contact and salt. The compound and the joint detail answer sun and water. The bottom rail answers ground contact. The fixing grade answers salt, because a fence fails at its fasteners first.

The face carries a 20-year fade claim. It rests on grade 4–5 to ISO 105-A02 on a xenon arc test, and the exposure hours behind that grade are on the lot report. The claim covers the board face, not the fixings.

Specifications

A lot is released against these values, and its report travels with it.

Property	Value	Standard / note
Board thickness	18, 20 and 22 mm	20 mm stock; 16–25 mm to order
Post section	90 × 90 and 100 × 100 mm	100 × 100 on exposed runs
Compound	Wood fibre, HDPE, UV stabilizer, biocide	No formaldehyde, no heavy-metal additive
Water absorption	< 0.5%	ISO 62, 24-hour immersion
Flexural strength	≥ 24 MPa	ASTM D790
Colour fastness	Grade 4–5	ISO 105-A02, xenon arc
Surface	Embossed grain, brushed or smooth	Grain rolled during extrusion, not printed
Colours	Dark brown, light grey, carbon black	Plus 2 more grains; custom tone on a batch
Fire	Flame-retardant formulation	Class to EN 13501-1 on the lot report
Fixings	Stainless, grade by exposure	316 where salt reaches the boundary
Certification	EN 15534 test report · ISO 9001	CE marking where a DoP is issued
MOQ	200 m, or 50 sets, a set being one bay with posts and caps	Mixed thicknesses quoted together
Delivery	15–30 days	After deposit and colour approval

One row decides more projects than the rest. Water absorption below 0.5% is what lets the board sit at the bottom rail through a wet winter, and it separates this from a timber panel.

Choosing Board Thickness and Post Section

Six exposures cover most boundaries. Check the post column first: the post is what fails, not the board.

Exposure	Board	Post	Why
Sheltered garden to 1.5 m	18 mm	90 × 90	Short bay, low wind; ground contact is the risk
Standard garden to 1.83 m	20 mm	90 × 90	The default specification for a domestic boundary
Exposed frontage	22 mm	100 × 100	Long unsupported edge, and gusting across a face
Coastal boundary	20 mm	100 × 100	Salt attacks the fixing; exposed wind sets the post
Pool surround	20 mm	90 × 90	Splash and chlorine, not wind load
Boundary over 1.83 m	22 mm	100 × 100	Larger wind area; post needs an engineer's number

Two rows are often specified the wrong way round. A coastal site upgrades the board and leaves the fixing, when salt reaches the screw first. A pool surround upgrades the post, when splash is the exposure and drainage is the fix.

A thicker board is not automatically a stronger fence. A 22 mm board on a 90 × 90 post still fails at the post. A 100 × 100 post carries 23 per cent more section area than a 90 × 90, and stiffness rises faster than that. The post is the efficient half of a wind upgrade.

Compared with Timber, PVC and Aluminium Fencing

Four outdoor materials are compared where a boundary actually fails, including where this one loses.

Criteria	WPC board	Timber	PVC panel	Aluminium
Water	< 0.5% absorption	Swelling and rot	Unaffected	Unaffected
Sun	UV stabilizer in the compound	Greys and splits	Chalks and yellows	Coating fades
Ground contact	Stable to the bottom rail	Rots at the base	Stable	Stable, but stains
Impact	Dents, does not shatter	Cracks at a knot	Brittle in cold	Dents and shows it
Repair	Replace the board	Replace the board	Replace the panel	Replace the panel
Look	Wood grain, warm	Real wood	Uniform, reads as plastic	Metal, reads as commercial
Cost per metre	Middle	Low, plus upkeep	Low	Highest
Where it loses	Not a security barrier; heavier than PVC; colour set is narrower than timber stains	Cheapest first invoice	Cheapest and lightest	Lighter and non-combustible

Price Factors

Five variables move the price per linear metre:

Board thickness

22 mm uses about 22 per cent more compound than 18 mm across the same face, and that lands in the metre rate.

Post section

100 × 100 carries more material per post, and it is the cheaper way to stiffen a run.

Colour

Three stock colours run without a set-up. A bespoke tone needs a batch run and a longer lead time.

Surface

A rolled grain adds a pass at the die. Smooth board is the cheaper face and the one that shows marks.

Run and fixing

Long runs price lower per metre; 316 fixings and footings are separate lines. A 50 m boundary is 27 bays and 28 posts, which is the count to price.

The cheapest metre is 18 mm board, 90 × 90 post, stock colour, smooth face, full container. Every step away is itemised on the quotation, not folded into the rate.

Quality Control and Loading

Four records per container

Record	What it covers	Issued at
Compound record	Wood-fibre to HDPE ratio, stabilizer and biocide dose	Mixing
Thickness and profile	Board gauge, interlock, straightness over the length	After extrusion
Colour and surface	Grain and tone against the retained reference board	After embossing
Loading check	Board count, post sections and fixing grade	Before loading

The fixing grade is checked at loading, not at packing. A 316 order that ships with 304 screws passes every earlier inspection and fails in service, so the grade is written on the bundle label.

A claim is settled on those records. The bundle label ties a short delivery to a lot.

Packing and loading

Item	Detail
MOQ	200 m, or 50 sets
20' GP	Quoted on the load plan
40' HQ	≈ 2,800–3,200 linear m, thickness dependent
Lead time	15–30 days after deposit
Port of loading	Ningbo / Shanghai
Packing	Bundled, corner-protected, on timber bearers
Marking	Colour batch, thickness, fixing grade

Corner boards protect the cut ends, and bundles ride on bearers, not the container floor. A board that takes a set in transit bows once on the post.

Transit damage is settled on the loading photographs, and end damage visible there is replaced with the next shipment at our cost. Claims are accepted within 7 days of arrival.

Application Scenarios

Eight outdoor settings cover most of what ships. Each row pairs a specification with the question to settle.

Villa courtyard

Warm face against planting; luxury private villa perimeter boundaries, courtyard garden screening and landscaping partitions.
• Specification: 20 mm, 90 × 90, dark brown
• Settle before ordering: Boundary line and height covenant

Coastal plot

Salt reaches the screw first; exposed beachfront property perimeters, high wind-load resistance and marine-grade anti-corrosion boundary runs.
• Specification: 20 mm, 100 × 100, 316 fixings
• Settle before ordering: Distance to the shoreline and wind exposure rating

Pool side

Splash, and a cool face underfoot; private and resort swimming pool surrounds, splash-resistant safety boundary with clean drainage integration.
• Specification: 20 mm, 90 × 90, light grey
• Settle before ordering: Drainage away from the post base and chlorine splash resistance

Roof terrace

Light panel on a raised deck; penthouse rooftop terrace privacy screening, elevated garden dividers and wind-break panels on timber/composite subframes.
• Specification: 18 mm, 90 × 90
• Settle before ordering: Wind uplift calculations and fixing details to the structural deck joists

Cafe and restaurant

Screens a seating area; commercial hospitality outdoor dining enclosures, sidewalk bistro patio dividers and street-front privacy partitions.
• Specification: 20 mm, carbon black
• Settle before ordering: Fire class and reaction-to-fire standards required by local municipal code

Holiday park

Repeatable per plot; modular holiday resort cabin plot dividers, uniform leisure village boundaries and glamping perimeter fencing.
• Specification: 20 mm, stock colour
• Settle before ordering: Plot layout count, standard bay modules, and gate/access positions

Park and civic

Long run, public loading; heavy-duty municipal public park perimeter, pedestrian greenway trail boundaries and high-traffic civic landscaping barriers.
• Specification: 22 mm, 100 × 100
• Settle before ordering: Vandal resistance, public impact durability, and maintenance replacement policy

Balcony screen

Screens without a wall; multi-family apartment balcony privacy dividers, loggia acoustic and visual partitions without adding heavy masonry loads.
• Specification: 18 mm, 90 × 90
• Settle before ordering: Fixing base details, balcony balustrade attachment, and multi-family building regulations

Where this fence is not the answer

Where the boundary must stop people

A composite board is a screen: it resists weather, not force, and a determined entry takes minutes. Secure perimeters take steel.

Where a non-combustible boundary is required

The board is flame-retardant and does not reach A2. Within 1 m of a boundary, masonry or metal is the correct answer.

Where 316 fixings are ruled out on cost

304 screws tea-stain a white wall in a season on the coast. That is the wrong specification, not a maintenance problem.

Where the ground moves

Made ground and clay heave take a post out of plumb, and no board section corrects that. The footing is the fix, and it is outside this product.

Installation

01.

Ground contact and drainage

The bottom rail sits clear of the soil. A board that touches earth holds water at its lower edge, and that edge is where a fence begins to fail, whatever the compound.

Water is led away from the post, not into it. A concrete collar that stands proud of the ground sheds water; a flat collar collects it at the base.

On a coastal site the fixings are the schedule, not an upgrade: 316 screws and brackets, no plain steel at a drilled hole, because one bare fixing stains the face below it.

02.

Cleaning and colour over the years

Washing is the whole schedule. Soap, water and a soft brush clear pollen, bird lime and traffic film, none needs a solvent.

A dark board in full sun runs hotter than a light one, and heat moves a long panel. On a west-facing run, light grey holds shape better.

Judge colour in daylight against the retained board, not a photograph. A repeat order carrying its batch number is matched to that board; without the number, only the stock swatch is available.

Supply and Order

Price basis

The five variables above set the price, and the port sets the delivery term. Reply lands the same day with FOB or CIF, a bay plan and the CBM.

Container

The 40' HQ figure is the planning number. Two thicknesses can share a load, and the mix is settled on the load plan.

Production

Deposit to loading: 15–30 days. A custom colour adds a batch run, and the holiday shutdown needs booking ahead.

Paperwork

Lot report, loading photographs, packing list, SGS on request, customs certificates before the vessel.

Repeat orders

Quote the original batch number and the board is matched to the retained reference rather than a swatch. Without it, only the stock swatch can be matched.

Fixings

Posts, brackets, caps and trims travel with the boards at the grade the exposure needs.

Swatches

Sent free. Freight is the buyer's, dispatch in 3–5 days, and the charge comes off the first order.

Own brand

Logo on the wrap only, so the board face stays clean, and a minimum run applies.

Terms

30 per cent with the order, the balance against the bill of lading, or an L/C at sight.

Where it ships from

Boards are made in Hangzhou, Zhejiang, and leave through Ningbo or Shanghai.

Factory

Our Certificates

FAQ

Q: What material is your outdoor composite fence made of?

A: Our outdoor composite fence is made from wood/bamboo powder and HDPE through high-temperature composite processing. It is formaldehyde-free, heavy-metal-free, 100% recyclable, and meets green building material standards.

Q: How long does the composite fence last outdoors?

A: It has a service life of 15–30 years under normal use. With proper maintenance, it can last up to 50 years without cracking, warping or deforming, much longer than traditional solid wood fences.

Q: Does the composite fence require frequent maintenance?

A: No. It does not need painting or waxing. You only need to rinse it with clean water for daily care, which greatly reduces long-term maintenance costs.

Q: Can you customize color, size and thickness?

A: Yes. We support color and thickness customization (MOQ: 500 sqm). Standard thickness is 20mm, customizable from 16mm to 25mm. Multiple wood-grain colors and custom sizes/shapes are available.

Q: What scenarios are your composite fences suitable for?

A: They are widely used in villa courtyards, balconies, pool areas, parks, scenic spots, and outdoor spaces of cafes, restaurants, chain hotels and resorts, matching modern, New Chinese and other architectural styles.