Chain Link Privacy Slats: How to Choose Slats That Fit and Last

Chain link privacy slats are HDPE or PVC inserts threaded through the mesh — vertically, diagonally or horizontally — that block roughly 80–95% of the view while still letting air through. Three numbers decide whether they fit and how they look: fence height, mesh aperture and wire gauge. Get those wrong and the slats either will not seat properly in the diamond or will not lock in place.

What are chain link privacy slats?

In Australia and New Zealand the fabric is usually called chainwire. The inserts that go through it are privacy slats; the vertical version is a vertical slat, and the green wall effect that hides a yard completely is often sold as hedge slats. A slat threads through the diamond mesh and locks against the wire, so the fence reads as a solid line from a distance while still allowing air movement.

Materials vary with budget and climate:

• HDPE (high-density polyethylene) — the mainstream choice, normally UV stabilised.
• PE, polypropylene and PVC — used for lighter or coloured slats.
• Aluminium and timber — sold for a heavier, more architectural look.

How much privacy do slats actually give?

Manufacturer figures for screening land at about 80–95%. The gap between that and 100% is deliberate: the slats leave space for air, which keeps the fence from acting like a solid sail. Slat width, the direction of insertion and how tightly the slat seats in the mesh all move the number.

Colour matters too. ASTM F 934 covers the standard colours for polymer-coated chain link fence materials, so if you are matching slats to a coated fabric, name the colour reference you need rather than describing it.

Which three numbers decide whether slats will fit?

Professional chainwire installers reduce the whole selection to three measurements:

1. Fence height — sets the slat length you order.
2. Mesh aperture — the diamond size the slat has to pass through.
3. Wire gauge — thicker wire leaves less of the diamond open for the slat.

Retail slats are stocked in sizes for common fabric heights (4 ft, 5 ft and 6 ft), but that is a convenience, not a fit guarantee. The mesh aperture and wire gauge still decide whether the slat seats and locks. We do not publish a slat-width-to-mesh-size conversion table, because no standard gives one — send us the fabric specification and we will match the slat and confirm it with a sample.

ASTM F 3000/F 3000M: the slat types you will be quoted

The standard that covers polymer privacy insert slats for chain link fabric groups them into four types:

• Type P-V — polyethylene, fitted vertically.
• Type P-D — polyethylene, fitted diagonally.
• Type F-VDH — modified fibreglass, which can be fitted vertically, diagonally or horizontally.
• Type PI-V — pre-inserted during fabric manufacture, in two styles: Style 1a, a wide slat in an enlarged mesh, and Style 1b, a friction-fit slat in standard 2 in (50 mm) mesh.

If you are specifying on paper, quote the type and style. If you are specifying by sample, this is the language your supplier will use back to you.

Vertical, diagonal or horizontal — and which locking type?

• Vertical slats give the most uniform privacy and the cleanest line.
• Diagonal slats produce the traditional hedge look and can read as denser than vertical at an angle.
• Horizontal slats are used where the design calls for a banded appearance.
• Locking: top-locking, bottom-locking and self-locking. They differ in how firmly the slat is held, how much privacy they deliver and how they behave under wind.

Do slats increase wind load?

Yes. Slats add solid area, so the fence has to resist more wind than bare mesh. The reason slats are chosen over solid sheeting on exposed sites is that they still let air through: ventilation is designed in to keep the wind load down. Even so, on a coastal or hilltop site the frame should be built for the extra load — deeper posts and closer post spacing than you would use for the same fence without slats. See the star picket installation guide for driving depths and spacing.

Which standards cover chain link and its slats?

Standard	What it covers
ASTM F 3000/F 3000M	Polymer privacy insert slats for chain link fabric, and privacy fabric supplied with slats pre-installed
ASTM F 934	Standard colours for polymer-coated chain link fence materials
AS 1725.1-2010	Chain Link Fabric Security Fencing & Gates (Australia / New Zealand)

On coatings: we produce 40 g/m² regular zinc and 200 g/m²-and-above heavy zinc. Coating class and minimum coating mass are confirmed against your local standard in the quotation, and we produce to your local standard on request. For the mesh and gauge decision underneath the slats, see how to choose chain link fence and the chain link fence specifications.

Frequently asked questions