Crimsafe Ultimate Security Screens Darwin

Crimsafe Ultimate is the strongest product in the Crimsafe range and the right choice for Darwin homeowners who need maximum forced-entry resistance without blocking airflow or natural light. DABSCO at Winnellie is a licensed Crimsafe installer and has been supplying and fitting security screens across Darwin and the Northern Territory since 1966. If you are securing a front entry, a large sliding door facing the street, or an opening in a remote property, Crimsafe Ultimate delivers performance that standard fly screens and aluminium grilles cannot match.

Crimsafe Ultimate uses 0.9mm Tensile-Tuff 304 structural grade stainless steel mesh, which is 26.5% thicker in cross-section than the 0.8mm wire used in most competing security screens. That extra thickness matters in Darwin. The build-up and wet season bring high humidity, salt air from the coast, and insect pressure that standard mesh struggles to handle long-term. The 304 grade stainless steel resists corrosion in tropical coastal conditions, and the black mesh minimises glare so you can see out clearly from inside, day or night.

The 1.5mm x 1.5mm aperture between strands is small enough to exclude mosquitoes, flies, and midges during the build-up, while the open weave maintains the cross-ventilation that Darwin homes depend on year-round. A solid security door stops airflow entirely. Crimsafe Ultimate lets you lock up and still catch the dry-season breeze.

Crimsafe Ultimate’s strength comes from the combination of its mesh grade and its Screw-Clamp fastening system. The mesh is mechanically fixed to the frame using twice as many stainless steel screws as Crimsafe Regular, with a clip-on cover that conceals the screw line. That concealment is not just aesthetic. It removes the lever point an intruder would use to attack the fixing, and it protects the fastening hardware from UV exposure and tropical humidity.

The Screw-Clamp grip tightens under impact, dispersing force across the frame rather than concentrating it at any single point. This is the same engineering principle that allows Crimsafe Ultimate to reach impact resistance up to 750 joules during testing, which is seven times the singular impact threshold required under the AS 5039 security screen standard (the Australian Standard for security screen doors and window grilles). It also passes the knife shear test under AS 5041, the methods of test standard for security screen doors.

For wider spans and taller openings common in Darwin’s tropical home designs, the frame maintains its structural integrity without the need for additional mid-rails or bars. This allows large louvre openings, wide sliding entries, and full-height window bays to be secured without breaking the sight line.

Darwin sits in Wind Region C under AS/NZS 1170.2, which sets the structural loading requirements for all building products installed in cyclonic areas. During cyclone season, properties across Darwin, Palmerston, and Humpty Doo are often left unattended during evacuations. Security screens that can withstand both wind pressure and opportunistic forced entry in that window become essential rather than optional.

Crimsafe products are tested under conditions that reflect cyclone-level wind pressure and physical attack, and the NT Government Building Advisory Services publishes guidance on security and structural requirements for NT homes. DABSCO installs Crimsafe Ultimate across Darwin, Palmerston, Katherine, and remote NT communities where the combination of cyclone exposure and extended periods of unoccupied properties makes product strength a genuine priority.

Crimsafe Ultimate carries a WERS energy rating of up to 3 Stars Cooling in a number of window applications. In Darwin’s climate, where NCC Section J energy compliance requires attention to solar heat gain through openings, a rated security screen that also contributes to cooling performance has real value. You can check specific product ratings through the WERS energy rating database at wers.net.

Not every opening needs Crimsafe Ultimate. But for Darwin homeowners, there are clear situations where the upgrade is worth it. Front entry doors facing the street are the first point of forced entry in most residential break-ins. Large sliding doors opening to a rear deck or carport are a secondary target. Any opening in a BAL-rated area where bushfire attack level requirements apply to frames and glazing is another consideration.

DABSCO installs Crimsafe security screens across the full range of products: hinged doors, sliding doors, and window screens. Crimsafe Ultimate is available across all these product types, meaning you can match the frame style and colour to your existing joinery. Powder coat finishes are available in a range of colours to complement Bradnam’s aluminium windows and door frames already installed in your home.

Crimsafe Ultimate carries a 15-year warranty, which reflects both the material quality and the AS 5040 installation standard that licensed installers like DABSCO follow. AS 5040 covers installation requirements for security screen doors and window grilles, including fixing methods, frame anchorage, and clearance tolerances. Correct installation under AS 5040 is what the warranty relies on. An unlicensed installer fitting the Crimsafe product can void that warranty and compromise the AS 5039 compliance of the finished installation.

Finance is available through Latitude Gem Visa (6 months interest-free on purchases over $250, 18 months interest-free on purchases over $1,500) and HUMM (buy now, pay later, no interest). Both options are available on Crimsafe Ultimate supply and installation through DABSCO.

External product technical specifications are published directly by Crimsafe product specifications and are updated when product ranges change.

How much stronger is Crimsafe Ultimate than regular Crimsafe?
Crimsafe Ultimate is up to 40% stronger than Crimsafe Regular and reaches up to 750 joules of impact resistance, which is seven times the singular impact threshold required by AS 5039.

Is Crimsafe Ultimate suitable for Darwin’s cyclone conditions?
Yes. Crimsafe products are tested under conditions that reflect cyclone-level wind pressure and impact attack, making them appropriate for Wind Region C properties across Darwin and the NT.

Can you see through Crimsafe Ultimate at night?
The black 304 grade mesh minimises glare and maintains outward visibility from inside during the day. At night, visibility depends on interior and exterior lighting conditions, as with any mesh screen.

How long do Crimsafe Ultimate screens last in Darwin’s tropical climate?
Crimsafe Ultimate carries a 15-year warranty. The 304 structural grade stainless steel mesh and powder-coated frames are rated for tropical coastal conditions, including high humidity, UV exposure, and salt air.

What is the difference between Crimsafe Ultimate and Crimsafe Classic?
Crimsafe Ultimate uses double the screw count of the Classic range, adds a concealed clip-on fastening cover, and delivers up to 40% greater strength. It suits high-risk openings such as street-facing entry doors and large sliding doors.

Does DABSCO install Crimsafe Ultimate across Darwin and Palmerston?
Yes. DABSCO is a licensed Crimsafe installer operating from Winnellie and services Darwin, Palmerston, Humpty Doo, Katherine, Kununurra, and remote NT communities.