Security doors & screens
Diamond grille security doors
Diamond grille security doors and screens: the traditional Australian design, with a 7 mm aluminium grille and a choice of mesh behind it.
- Grille
- 7 mm aluminium diamond pattern
- Mesh behind
- Flyscreen, Tuff mesh or DVA one-way
- Frame
- 75 mm powder-coated profile
- Locking
- Triple lock option
Overview
A diamond grille door has a 7 mm thick aluminium grille in a diamond pattern across the panel, set in a heavy-duty 75 mm frame profile.
Behind the grille you choose the mesh: standard flyscreen, the tougher Tuff mesh, or DVA one-way mesh for more privacy. An optional triple lock adds security.
Diamond grille has long been the budget-friendly way to secure a doorway, and matching window grilles keep the doors and windows looking the same.
Configurations
Every door is made to measure and professionally installed.
- Hinged doors
- Sliding doors
- Stacker doors
- Fixed panels
- Window grilles
Gallery
Why Knight
Why choose Knight?
4.9 stars on Google
Rated by 397 customers.
25+ years
Hands-on experience supplying and installing across Perth, with a name for reliable service and precise workmanship.
Fast turnaround
Don't wait months to secure your home.
Made for your home
Every job starts with a free on-site quote and is made to measure.
Google reviews
Rated 4.9 from 397 reviews
★★★★★
Fantastic job by Knights Blinds & Security. The team turned up within a day of me requesting a quote which was excellent. The double sliding screen door looks great and slides perfectly. The four window screens all fit perfectly and look like they were original, they match the window colour perfectly. The installation team took away the old screens and left no trace. Delivery was approx 3 weeks after order which was reasonable.
Lance Keys · April 2026, on Google ★★★★★
High quality workmanship and great overall experience. This is the 2nd time I have gone to Knight Blinds and Security for security doors and windows, both have been excellent experiences.
David · April 2026, on Google ★★★★★
Very prompt service. Did what they promised. Very happy with products we received. Installer Allan was tidy and friendly. Cleaned up after himself.
john bernard · March 2026, on Google ★★★★★
Very happy with everything, i have recommended Knight Blinds & Security to others as the whole process was professional and decent prices. Thank you very much Manish
Jessica byrne · March 2026, on Google ★★★★★
Very happy overall. Price is good and product is good quality. I was having issue with the property and Knight security was very helpful. They hold back installation for a few months. Very much appreciate your help.
Nanz · March 2026, on Google ★★★★★
I am very satisfied with the service and security door was very good. This company very profesional.
Fang Yin · February 2026, on Google
Other security doors & screens
All security doors & screensInvisi-Gard
Invisi-Gard security doors and window screens: 316 marine-grade stainless steel mesh in an aluminium frame, so you keep the view and the breeze.Alu-Gard
Alu-Gard security doors and screens use a 1.6 mm perforated aluminium sheet: strong, corrosion-resistant and clear to see through.Vision-Gard
Vision-Gard security doors and screens use a perforated aluminium privacy mesh: you can see out, but it is hard to see in.Colonial
Colonial security doors: cast aluminium doors with decorative patterns for period and character homes, with matching sidelights.
Free quote
Ready for a quote?
Tell us about your windows and doors, and add a photo if you have one. We will be in touch to arrange a time to measure.