Boundaryline Fencing » Timber Fencing » 3-rail Post and Rail fencing

3-rail Post and Rail fencing

The premium rural lifestyle fence

Boundaryline 3-Rail is our premium Post&Rail fencing system; a great timber fence for any landscape. The third rail provides a symmetrical, refined appearance that ensures our 3-Rail Post&Rail makes a statement for driveways, entranceways and boundary fences on lifestyle blocks, farms, and any rural property.

We recommend 3-Rail Post&Rail along with our wooden entrance gates for that premium look in lifestyle fencing.

The unique Boundaryline straight-through mortise in the fence posts means that the posts and rails interlock without using any hardware and results in a strong, durable fence.

Select from the options available – Macrocarpa or Treated Radiata Pine timber, three different styles, large feature posts – and get a first-class fence for your property.

Ask us for a quote on a 3-rail fence that will enhance your property perfectly.

What’s great about Boundaryline Post&Rail:

Selected premium grade timber
Treated Radiata Pine – for guaranteed durability
or Macrocarpa – chemical-free and naturally durable

Straight-through mortise
Strong and durable, easy to install, and doesn’t use any ugly brackets.

Chamfered post-tops
For a tidy, premium appearance

Bevelled rails
For a uniform rail to match the posts
(except Classic 112 Macrocarpa)

Quick and simple installation
Do it yourself – or get one of our Approved Installers on the job

The 3-rail specifications:

We have three different styles available to enhance any property:


Classic 112
125 x 125mm Line Posts
125 x 125mm End Posts
150 x 50mm Rails
2.1m Rail Lengths
1.1m - 1.2m Fence Height


Signature 110
150 x 100mm Line Posts
150 x 150mm End Posts
150 x 60mm Rails - Macrocarpa
150 x 50mm Rails - Radiata
1.8m / 2.1m / 2.4m Rail Lengths
1.1m - 1.2m Fence Height


Signature 115
150 x 150mm Line Posts
150 x 150mm End Posts
150 x 60mm Rails - Macrocarpa
150 x 50mm Rails - Radiata
1.8m / 2.1m / 2.4m Rail Lengths
1.1m – 1.2m Fence Heigh

Options for your 3-rail fence:


Feature Posts
large posts on the ends, gateways and corners


Stock wires
keep small animals and pets on the right side of the fence


Hot wires
maintain stock control


Bituproof waterproofing membrane
enhanced durability for Macrocarpa

Contact us today on 0800 003 006 to discuss how we can provide a Post&Rail solution for your project.

Or click here to request a quotation - we’ll get back to you very quickly.

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Product Gallery

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A premium home with a premium fence Macrocarpa Signature 110
3-rail post&rail is recommended for horse paddocks due to the 1.2m out-of-ground height 3-rail post&rail
Boundaryline 3-rail can be used effectively in residential situations 3-rail post&rail
Macrocarpa 3-rail with custom 200x100 posts makes the perfect fence for this farm machinery dealer Macrocarpa 3-rail
Boundaryline 3-rail is the ideal lifestyle block fence – this is Signature 115 in Radiata Radiata Signature 115
Classic 112 in Radiata – Define your roadside boundary with our post&rail Radiata Classic 112
Macrocarpa 3-rail fence in the Signature 110 style with matching gates - a grand entrance Macrocarpa Signature 110
Signature 115 Macrocarpa post&rail fits in perfectly in this Central Otago landscape Macrocarpa Signature 115
Macrocarpa Signature 115 is used here at a premium property at Clearwater Resort Macrocarpa Signature 115
Post&rail can be installed to follow the ground contour neatly. 3-rail post&rail
This farm driveway is enhanced with a Radiata 3-rail Signature 115 fence and matching gates Radiata Signature 115
This impressive Macrocarpa 3-rail fence uses custom-sized 200x100 posts Macrocarpa 3-rail