BUSHFIRE SHUTTERS SYDNEY

Shutter World supplies and installs bushfire shutters across Sydney, rated to BAL-FZ and BAL 40. Bushfire shutters fit over windows and doors to reduce the radiant heat and ember entry that cause most home losses in a bushfire. The BAL-FZ units we install are supplied by HEROAL and built from stainless steel. Each shutter has a metal crank handle that stays operable during a fire, with manual or electric operation and an emergency manual override.

What BAL-FZ means and Why windows fail in a bushfire

BAL-FZ, or Bushfire Attack Level (Flame Zone), is the highest bushfire risk rating a property can receive under Australian Standard AS 3959. It applies where a building may face direct flame contact and a radiant heat flux above 40 kW/m². Standards Australia defines six bushfire attack levels: BAL-LOW, BAL-12.5, BAL-19, BAL-29, BAL-40 and BAL-FZ.

A single property can carry different ratings on different elevations. The rating for each face is set by your location, the type and density of nearby vegetation, the distance from that vegetation to the building, and the slope of the ground beneath it. A bushfire assessment determines which rating applies.

Windows are a common failure point. Radiant heat can crack glass before a fire front reaches the building, and wind-driven debris can shatter it. Once glass fails, embers and flames enter through the opening. Bushfire shutters close over the glazing to hold that barrier in place.

BAL-FZ and BAL 40 shutters

Shutter World installs two ratings of bushfire shutter, BAL-FZ and BAL 40, for properties at different risk levels.

BAL 40 shutters

BAL 40 shutters suit properties rated to BAL 40 and below. Some certifiers accept Shutter World’s BAL 40 roller shutters toward a BAL-FZ specification when specific window modifications are included. Confirm this with the certifier handling your build before ordering.

The testing requirements for BAL-FZ are more demanding than for BAL 40. BAL-FZ shutters must hold their rating under direct flame contact, while BAL 40 addresses radiant heat and ember attack.

BAL-FZ shutters (HEROAL)

BAL-FZ shutters are the option for flame zone properties. The units Shutter World supplies are made by HEROAL with a stainless steel curtain. They cover windows and doors that need flame zone protection and operate as everyday shutters when not in use. [ADD: state the test certificate, testing body, and glass configuration the HEROAL units are certified with, for example tested to AS 1530.8.2.]

Standards, Testing and Specifications

Bushfire shutters in Australia are governed by AS 3959, Construction of buildings in bushfire-prone areas, and tested to AS 1530.8.2 for flame zone performance. AS 3959 sits under the National Construction Code and sets the BAL for a site. A flame zone shutter must meet its rating when fully closed.

[ADD: name the testing body, for example CSIRO, the test report or certificate number, and the glass type used in the test, once confirmed for the HEROAL product.]

The figures below cover the BAL-FZ shutter. Confirm final dimensions against current HEROAL specifications before publishing.

Operation and everyday use

Bushfire shutters are operated manually or electrically and do not deploy automatically, so you close them when a fire threat is present. Each shutter has a metal crank handle that stays operable during a fire, and electric units include an emergency manual override for use during a power outage.

Closed shutters also reduce heat transfer through the glass, cut external noise, and add security at the opening. Shutter World’s broader roller shutter range includes a slimline design and perforated slat options that allow filtered light and air. For homes outside bushfire areas, the same operation applies to our domestic roller shutters.

Frequently Asked Questions

Do bushfire shutters close automatically in a fire?

No. Bushfire shutters are operated manually or by an internal switch, so you close them when a fire threat is present. Electric units have a manual override, and a backup battery can be fitted so the shutter still operates during a power outage.

Can BAL 40 shutters give the same protection as BAL-FZ?

No. BAL-FZ shutters are tested against direct flame contact and meet a higher standard than BAL 40. BAL 40 addresses radiant heat and ember attack. Use the rating your bushfire assessment specifies for each elevation of the building.

Can I use bushfire shutters every day?

Yes. Bushfire shutters work as standard roller shutters when no fire threat is present. Closed, they reduce heat transfer through the glass, lower noise, and add security at the window or door.

How much space is needed above the window?

Bushfire shutters need clearance above the opening to house the rolled curtain. The amount depends on the shutter height. Confirm the exact allowance for your opening with Shutter World during measurement.

Will I receive certification for my bushfire shutters?

[ADD: state what documentation Shutter World provides on completion, for example a certification letter for the certifier, and when it is issued.]

Get a bushfire shutter quote in Sydney

Shutter World measures, supplies and installs bushfire shutters across Sydney for BAL-FZ and BAL 40 properties. Contact the team for a quote, or for help confirming the BAL rating that applies to your build.