"Saving Perth Homes From Break-Ins"

Download Our Brochure
Request a Free Quote

Invisigard Doors & Screens

Why KNA Security?

With a solid reputation for providing quality products and exceptional customer service, KNA Security have become the number one choice in Perth in our industry.








Invisi-Gard – The best in Stainless Steel Security Doors & Screens!

Invisi-Gard is the absolute best in security doors and screens today, with a 15 year warranty you know you are getting Quality & Peace of mind.

Utilising the superior 316 Marine Grade Stainless Steel high tensile (900MPa) mesh, we produce the most secure aesthetically pleasing and corrosion resistant systems on the market.

stainless steel screen doors sliding stacking

Do you want maximum security, maximum visibility and product that will last? Then this is it!

Available as hinged security doors, sliding security doors, double security doors, security screens and escape screens. Pet doors available.
How much do security doors in Perth cost?

Invisigard Ratings

Demonstration of Strength

How Strong Is Our System?

INVISI GARD has been tested and shown to resist more than 50 consecutive impacts, each of 100 Joules of force without failure!

(We have done our own demonstration that shows a screen absorbing a MASSIVE 5 consecutive impacts at 588 JOULES of force EACH!!!).

316 steel mesh security

Our Stainless system not only passes the Australian Standards for the Dynamic Impact test that simulates a forced entry, it absorbed 10 times  the energy required!. It has also passed the Jemmy Test and Knife Test, keep your family, home and valuables safe from crime.

Here a 4kg block of hardwood is fired at 20 meters per second simulating debris in cyclonic storm conditions.

Only Quality Mesh

With so many mesh systems on the market all claiming to be the best it can be hard to know what’s best. Many stainless systems in Australia DO NOT meet the requirements set out in the Australian Standards.

Generally these products are not using High Tensile (900MPa) wire, do not continually check the composition via chemical certification, have inferior and cheap pre-treatments against corrosion before powder-coating, and use lower grade powder-coats that do not come close the UV resistance of the powder-coat used in Invisi-Gard systems.

strongest security screen door
Corrosion Resistance

Take care when choosing a stainless system, the Invisi-Gard system is fully insulated meaning the aluminium frame doesnt come into contact with the Stainless Steel mesh.

The Salt Spray Test is required by AS5039, security doors and screens have to pass 240 hours in this accelerated weather test with no sign of corrosion.

While some systems start to fail after just 500-750 hours, Invisi-Gard has resisted rigorous testing to 2,000 hours. The 316 Marine Grade Stainless used in our system resists 10,000 hours with no sign of corrosion!

INVISI-GARD Product Testing

Stainless Steel Mesh Knife Shear Test – AS5041 PASS

Dynamic Impact Test – AS5041 PASS

Lock and Hinge Lever Test – AS5041 PASS

Fire Attenuation – AS1530.4 43% Attenuation

Swimming Pool Safety – AS1926 PASS

Neutral Salt Spray PASS 1000 Hours

AS1170.2 Windborne Debris – 20m/s PASS

Security door visualiser

security door visualiser

Timber Look Finishes available

Ask us about our timber look frames.

Wood look screen doors
Possible configurations
Service Area

We supply and fit Security doors and screens Perth to Two Rocks, including Yanchep, Alkimos, Jindalee, Butler, Wanneroo, Banksia Grove, Brabham, Ellenbrook etc


Yes, we hold all relevant licences to supply and install security products. We hold a Security Agents Licence, 3 Security installer licences and 3 Security consultants licences. This ensures we are qualified, police cleared and fully insured.

Yes, we have privacy options like our Outlook system or we can do Grille doors with a privacy mesh. These give very good daytime privacy.

All our mesh security doors pass the Australian security standards and this requires triple locking.

Most of the time yes, we do not generally charge for this unless you have a non-standard profile like Gainsborough then there is a small fee.

All our security doors pass the impact tests required by the Australian Security Standards, we also conduct our own testing that surpass that required by the security standards.

All our security doors pass the knife shear tests required by the Australian Security Standards, we also conduct our own testing.

We have lots of standard colours that usually suit window frames, then we can powder coat on request to 100’s of different colours. Powder coating does take anywhere up to 7 working days extra. We also now have timber look security doors.

Yes, all our security products are also available a security window screen.

Good question! We have escape screens, these are fully secure from the outside while allowing egress from inside.

Yes, we have payment. Generally Interest Free plans from 6 months to 24 months.