What Is The Lifespan Of Metal Security Fences?

One of the most common queries we hear is how long our fencing systems will last. It makes sense right? The lifespan of a product is a good indication of how worthwhile it is as an investment for your business.

Fortunately, processes such as hot-dip galvanizing have made the lifespan of metal fencing increase dramatically since its conception.

So, let’s take a look at the properties that make Barkers metal security fencing so hard-wearing and answer the question “What is the lifespan of metal security fences?”.



Galvanizing & Durability Of Metal Fencing

Made from premium mild steel, Barkers palisade fencing is hot-dip galvanized to give it an expected average lifespan of more than 25 years.

Hot-dip galvanisation has become one of the best ways to protect your security fence from corrosion. This is a process in which the entire fence is coated in molten zinc, creating a barrier between the metal and its surroundings.

Galvanizing was first established in 1836, by Stanislas Sorel and since then has become a key process in the manufacturing of durable and long-lasting steel. In basic terms, it is a process in which the steel is cleaned and then coated by dipping it directly into molten zinc. Named the ‘galvanic’ method, this became the beginning of the hot-dip galvanizing we see today.

Galvanising is standard for palisade fencing. However mesh fencing is often a pre-galvanized finish unless specified otherwise, with an additional fee for a galvanised finish.


So, What Is ‘Pre-Galv’ Mesh?

Pre-galv is a process that shortens the immersion time in the zinc bath and all of the excess zinc is removed. This creates a thinner coating of zinc and means the steel will not be protected from the elements as long as a hot-dipped galvanised finish.

A ‘pre-galv’ fence must be powder coated, in order to add an extra layer of protection against corrosion.

A fence that is ‘pre-galv’ is generally covered in approximately 12 microns of zinc, whereas a hot-dipped galvanised product will be covered in approximately 70 microns of zinc.

Because of the small apertures in mesh, hot dip galvanising is extremely difficult. A galfan coating can be specified to increase the lifespan of mesh. A galfan finish will protect the surface for the same amount of time as hot dip galvanising while providing a much better product. But it comes at a price: A galfan finish will add about 15% to the cost of the system.


Erosion Rates Of Metal Fencing

Zinc erodes at an estimated 2 microns per year in the UK, so it’s important to consider your needs and what you’re getting for your money.

The protective zinc coating that is used within galvanized metal fencing protects the steel from corrosion and can be enhanced by a polyester powder coating to achieve any RAL colour finish.


Galvanization At Barkers

Galvanization is such a fundamental part of what we do that our factory is equipped for all parts of the galvanizing process. Most recently, we worked with one of our most highly experienced fabricators to manufacture two large tanks to be used in our galvanizing pre-treatment baths.

Each tank measures 3.5m(H) x3.4m(W) x6.4m(L) and weighs 9.6 tonnes. One holds 49,000 litres of hydrochloric acid, whilst the other holds 49,000 litres of heated degreaser. Before galvanising, materials are immersed in these baths to remove any oil or grease that may be present on the steel.

Take a look at our 28-year-old tanks being replaced with brand-new ones that we’re proud to say were manufactured in-house:



Repairing Your Metal Security Fencing

If your security fencing is likely to be attacked and damaged, it’s worth considering how easy it is to repair or replace, as this will directly impact its lifespan.

Palisade fencing, by design, offers a security solution that is easy to repair and maintain. In the event of the fence being damaged by attempted break-ins, small sections of the fence can be replaced, so that the section doesn’t become vulnerable.



Depending on the finish, a steel products life span can vary. Palisade fencing is hot-dip galvanized as standard. Whereas mesh, unless specified otherwise will often be a pre-galv finish.

Palisade is widely used all over the world, and hopefully, it’s clear now to see why. From its intimidating appearance to its impressive security credentials, palisade is a go-to for deterrent and high-security fencing.

With Barkers Fencing, you gain access to over forty years of expertise in the design, manufacture and delivery of high-security fencing, developed to meet the most stringent national and international standards.

To find out more about security fencing for your site, get in touch today.

Or simply call 01782 319264 to speak to an expert today.