Crimsafe Fixed Window Security Grilles: Permanent Protection for Windows That Don't Need to Open
Not every window in your home needs to open — but every window is still a potential point of entry. Crimsafe fixed window security grilles secure those openings permanently, with none of the bulk of traditional bars or the compromise of a standard flyscreen.
A Crimsafe fixed window security grille is a non-moving security screen panel designed for windows that stay closed year-round, such as awkward or high-set windows, upper-storey openings, or windows behind furniture where a sliding or hinged screen isn’t practical. Built from the same 0.9mm 304-grade Tensile Tuff® stainless steel mesh and Screw-Clamp® technology used across the full Crimsafe range, it can be face-fitted for a visible, bold finish or recess-fitted for a discreet, near-invisible one — giving you a permanent security barrier without the look of traditional window bars.
Why Fixed Windows Still Need Real Security
The Problem With "It Doesn't Open, So It's Fine"
A window that’s never opened is still glass, and glass is still an entry point. Homeowners often overlook fixed windows in a security plan simply because there’s no lock or handle to check — but a fixed pane with nothing behind it is exactly the kind of opening an intruder looks for. Traditional bars solve the security problem but bring their own downsides: they’re visually heavy, difficult to clean around, and can be a serious liability if that window is ever needed as an emergency exit or entry point for other reasons.
Crimsafe fixed grilles are built to remove that trade-off entirely.
Strength Without the Moving Parts - Built to Last.
Crimsafe fixed window grilles feature a non-moving panel design, purpose-built for windows that don’t need to open — with no track, hinge, or moving parts to maintain.
They’re available in two fitting options: face-fitted, for a bold, visible security statement, or recess-fitted with a specially engineered mounting frame for a cleaner, more discreet look.
And despite their slimline profile, the frame carries the same strength as a full security door frame, without visually dominating the window.
Same Superior Crimsafe Strength
All Crimsafe products exceed Australian standards of 500 joules of impact.
Crimsafe Ultimate withstands up to 750 joules of impact.
That’s a level of strength standard flyscreens and many other “security” products simply can’t match.
Manufactured in Australia to the highest quality standards, Crimsafe is the most trusted name in window and door security on the market.
Made to Measure for Any Shape
Whether you’re working with an arched heritage window, a domed feature pane, a circular porthole-style opening, or an architecturally unique design, each grille is made to measure specifically for that shape, so the fit is precise and the security mesh sits flush without compromising the window’s original character.
This makes fixed grilles a practical option for homes and buildings with non-standard openings, where off-the-shelf security solutions simply won’t work.
Completely Secure Your Home with Alcom + Crimsafe
For more than three decades, Alcom has helped Queensland homeowners secure every part of their home — not just the doors and windows people use every day, but the fixed panes that are easy to overlook until they’re the weak point in an otherwise secure house. Every fixed window grille is custom measured and manufactured in-house at our Yatala factory, and Alcom Security holds dual Platinum accreditation with 3M and been a Crimsafe Licensee for over 25 years.
We’ve completed more than 100,000 installations across South East Queensland, including fixed window security throughout Brisbane, the Gold Coast, Sunshine Coast, Redlands, Ipswich, Moreton Bay, Toowoomba, and the Scenic Rim. One team handles the consultation, measurement, manufacturing, and installation — no third party to coordinate, and no compromise on quality at any stage.
FAQS
A fixed grille is a non-moving panel built specifically for windows that don’t open, so it has no track, hinge, or moving hardware. Standard Crimsafe window screens are designed for windows that still need to open and close.
Yes. Crimsafe fixed grilles are made to measure and can be custom-built for arched, domed, circular, or other architectural window shapes, not just standard rectangular openings.
Face-fitted grilles sit on the surface of the window frame for a bold, visible security presence. Recess-fitted grilles use a specially engineered mounting frame to sit within the window opening for a cleaner, more discreet finish. Which option suits your home depends on the window and your preference, and we will discuss during your consultation.
No. The slimline frame and fine mesh give a much cleaner, less obtrusive look than traditional bars, and there’s no visible caging effect — just a subtle frame around the window.
Yes. Because there’s no opening mechanism to operate, fixed grilles are a common choice for upper-storey windows, stairwell windows, or other hard-to-reach openings where security matters more than day-to-day ventilation.
Yes. Alcom Security holds accreditation with both Crimsafe and 3M — the highest tier of accreditation either company awards to a dealer.
Crimsafe uses 0.9mm 304-grade Tensile Tuff® stainless steel mesh, fixed into the frame with a patented Screw-Clamp® system rather than a glued or wedged rubber seal. When impacted, the load spreads across the whole frame instead of concentrating on one weak point, which is why Crimsafe consistently outperforms standard screens in independent impact testing.
No. The Tensile Tuff® mesh is designed to maintain airflow and visibility while still stopping forced entry — you get the security without turning your home into a cage.
All products are manufactured in-house at our Yatala factory. We don’t outsource manufacturing, which means tighter quality control and faster turnaround from measure to install.
Alcom Security has been a family-owned and operated business since 1993, with a track record of more than 100,000 installations across South East Queensland.
Yes. Every grille is custom-built to the exact dimensions and shape of your window, including non-standard or architectural openings.
Request your free quote for a Crimsafe Security Window Grilles
We can also match Crimsafe Window Grilles with other 3M Security range for even greater protection. Chat to our customer service team about pairing your new Crimsafe with 3M Security Film on (07) 3801 4500