Mar. 24, 2025
The primary function of security mesh doors is safety. Yes, you'll want to select security doors that match the look and feel of your home. Although, what good are they if they won't withstand the test of time?
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So, I hear you asking' Do I need a stainless steel security door? What are the benefits?
'Stainless steel' is a general term that refers to a group of corrosion-resistant steel alloys that consist of at least 10.5% chromium.
The chromium-rich oxide film found on stainless steel occurs near the surface of the material and allows it to have a higher resistance to corrosion when compared to milder steel. This acutely thin and invisible film adheres tightly to the metal and has the ability to self-repair when it suffers from abrasion, machining or cutting.
As you start researching stainless steel security mesh doors, you'll likely come across doors with a 304 or 316 stainless steel grade. So how do they differ?
304 grade is the most common form of stainless steel security mesh doors. While still offering resistance to corrosion and good value for money, 304-grade steel can become tea stained, pitted, or even deteriorate, mainly if your property is within 5 km of the ocean.
For this reason, 316-grade stainless steel security doors are the preferred choice for coastal homes, commercial buildings, jetties and piers. 316 steel will resist ordinary rusting, pitting and crevice corrosion, providing peace of mind that your security mesh door will stand the test of time.
Invisi-Gard is an Australian-owned and operated company that designs an industry-leading range of security mesh doors.
The full range of security doors from Invisi-Gard is manufactured using 316 marine-grade stainless steel mesh from Meshtec. Meshtec uses high-tensile stainless steel wire to braid and constructs the Invisi-Gard mesh. In fact, every strand of wire is independently tested to strict international standards!
In addition to using the world's best stainless steel mesh, Invisi-Gard security doors are custom-made to size, exceed all Australian standards and are backed by an impressive 15-year warranty.
As an authorised dealer of Invisi-Gard security doors and screens, KNA Security has supplied and installed thousands of doors throughout the northern suburbs of Perth. We invite you to check out our Facebook or Google profiles, where we currently have 750+ five-star reviews!
Great family business. Easy to deal with. Reasonably priced and they deliver and install a quality product. I am more than happy with my purchase. Thanks KNA!
Chris Baker
Another 2 perfect fitting doors done on our property today by KNA. Swift, efficient service as always. Highly recommend. All the team from the office staff to the fitting team have great professional skills and communication.
Gailan O'Connell
Absolutely love my new doors and the service is fantastic, while fitting my new front doors I've had my back door measured up and look forward to having that replaced in the near future. Update: I now have back door and decided to also have my windows completed and I'm beyond happy! Communication is exceptional, service is absolutely amazing! And my house looks beautiful! Thank you KNA!
Cassandra Mills
Select from the standard Invisi-Gard doors with 316 marine grade stainless steel mesh or their big brother ' The Invisi-Maxx cyclone-rated doors offer maximum strength, security and durability. We have a security mesh door available in over 100 different powder-coated finishes to match any home or business.
The company is the world’s best stainless steel security screen supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
I am sure you have heard many security brands use the term 304 marine grade stainless steel or 316 marine grade
stainless ' sounds high tech but what does it actually mean?
Marine grade refers to stainless steel, that is suitable for marine environments and exposure to elements such as water, strong winds and saltwater corrosion.
304 marine grade stainless steel is generally used in outdoor environments, food processing and manufacturing
facilities ' it has a chemical composition of 18% chromium and 8% nickel and provides reasonable corrosion resistance.
While 316 marine grade stainless steel also has a composition of 18% chromium and 8% nickel but with the addition of 2% ' 3% of molybdenum, a metallic element that works in conjunction with the nickel alloy to provide a higher level of corrosion resistance.
Darley's ScreenGuard stainless steel security mesh system is made with 316 marines grade stainless steel mesh, making it the perfect security system for residential homes, particularly coastal environments. Overall 316 marine grade stainless steel is considered superior over 304 marine grade stainless steel because of its higher level of corrosion resistance.
As you probably already know stainless steel mesh is made of intersecting columns of stainless steel wire. This type of mesh has been around for centuries and is used in a number of applications such as fencing, barricading, grills, sisters and metal safety gloves.
As mentioned previously, the type of marine grade stainless steel is an important factor to consider because of its chemical composition and marine grade 316 is considered the superior mesh because of its higher corrosion resistance.
With the increasing popularity of 316 marine grade mesh, it has never been more important to reassure customers of the quality of the mesh used in their security products. It is for this reason, Darley send samples of our screenguardmesh to third party laboratories to verify the chemical composition of our stainlesssteel mesh and ensure customers receive quality 316 grade stainless steel.
Another aspect that needs to be taken into consideration is the diameter of the wire used in the stainless steel mesh. In Australia, the two most common wire diameter sizes are 0.8mm and 0.9mm. Our ScreenGuard system uses wire with a diameter of 0.8mm. The same wire diameter has been used in the manufacturing of ScreenGuard mesh for over 15 years, offering consistent quality and appearance but also making it slightly challenging in the weaving process with the thicker wire being harder to weave.
As you probably already know stainless steel mesh is made of intersecting columns of stainless steel wire. This type of mesh has been around for centuries and is used in a number of applications such as fencing, barricading, grills, sifters
and metal safety gloves. As mentioned previously, the type of marine grade stainless steel is an important factor to consider because of its chemical composition; marine grade 316 is considered the superior mesh because of its higher corrosion resistance.
Another aspect that needs to be taken into consideration is the diameter of the wire used in the stainless steel mesh. In
Australia, the two most common wire diameter sizes are 0.8mm for 316 marine grade mesh and 0.9mm for 304 marine grade mesh.
Our ScreenGuard system uses wire with a diameter of 0.8mm. The same wire diameter has been used in the manufacturing of ScreenGuard mesh for over 15 years, offering consistent quality and appearance but also making it slightly challenging in the weaving process with thicker wire being harder to weave. The tensile strength of the individual steel wire is an important contributor to the strength of the stainless steel mesh.
Tensile strength is the measurement of force the wire can withstand before it breaks. The stainless steel mesh used in the ScreenGuard system has a tensile strength of 850 ' 900 pascals. Meaning it can bear a heavy load before breaking
' making it an ideal barrier in extreme weather conditions. It's interesting to note ' it is possible to increase the tensile strength of a single strand of stainlesssteel wire. This process is referred to as quenching and involves applying a heat treatment to the wire, followed by rapid cooling ' which alters its chemical properties and increases or decreases its tensile strength.
Most security fabricators are familiar with the tests applied to security products under the Australian Standard AS - . One of the tests used in the standard is the Knife-shear test, which is designed to imitate a knife attack from an intruder, where they attempt to cut through the mesh of the security window or door.
Our ScreenGuard security products have been tested for and meet Australian Standard AS-, passing the knife
shear test, as well as, other compulsory tests including dynamic impact, antijimmy, child fall prevention, bushfire and fire attenuation.
In fact, the supplier of our ScreenGuard mesh goes one step further and applies their own knife shear and salt spray tests.
Every time we receive a new batch of mesh from our supplier, they provide an independent knife shear test report and salt spray test report ' which confirms over hours of testing with no signs of corrosion. Darley also conducts spotcheck testing with a NATA accredited laboratory to provide a secondary level of QA screening.
Another important factor that needs to be taken into consideration is the actual installation of the security doors and windows. AS is the standard that governs manufacturing of security windows and doors, while AS is the Australian Standard that for installing Security screen doors and window
grilles. This standard provides installers of security screen doors and grilles with specifications for installing security screen doors and window grilles used primarily= in residential applications. If the security product is not installed correctly and according to these standards, then it is not considered secure.
For more Pleated Insect Screeninformation, please contact us. We will provide professional answers.
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