Shire Security Doors and Screens

Case Study: Security Door Installation in a Cronulla Beachfront Home

By Steve ยท Owner & Licensed Security Installer (Master Security Licence #000105713)

Reviewed by Steve

Last updated: 18 June 2026

An illustrative example based on typical Cronulla beachfront projects where salt-air corrosion had destroyed older screens: the problem, the ForceField 316 marine-grade solution, the install, and the long-term result with a 10-year warranty.

Key product notes

  • A Cronulla beachfront home had lost two sets of budget security screens to salt-air corrosion in under five years, with pitted mesh, rusting fixings and seized locks.
  • The fix was Prowler Proof ForceField with 316 marine-grade stainless steel mesh in a fully welded frame, the correct specification within a kilometre of the surf.
  • After installation the home gained airflow, clear ocean views, visible deterrence and a 10-year full replacement warranty, with only a fortnightly fresh-water rinse to maintain it.
  • Shire Security Doors and Screens is a coastal specialist based in nearby Engadine. Free measure and quote on 0410 474 256 or steve@shiredoors.com.au.

The situation: a Cronulla beachfront home losing screens to salt

A two-storey home one street back from the Cronulla surf had been through two sets of security screens in under five years. The owners called Shire Security Doors and Screens after the second set, fitted by a travelling operator, had pitted, stained and seized within three summers. Within roughly a kilometre of the ocean the salt load is relentless, and the budget aluminium and 304-grade products simply could not cope. The brief was clear: a door and screens that would last, keep the sea breeze flowing, and not block the water views.

Steve attended for a free on-site measure, assessed the exposure, the existing openings and the substrate, and confirmed what the owners suspected: the previous products were never specified for true beachfront conditions. This is one of the most common coastal callouts in the Shire, and the solution is almost always the same combination of mesh grade, frame construction and finish.

  • Beachfront home roughly 1km from the Cronulla surf
  • Two sets of budget screens lost to corrosion in under five years
  • Pitted mesh, rusting fixings and seized locks within three summers
  • Owner priorities: longevity, airflow and uninterrupted ocean views

The challenge: why salt air defeats the wrong product

Salt air attacks security screens in three ways at once. Chloride from sea spray breaks down the protective passive layer on stainless steel, causing pitting and staining; moisture sits in screw penetrations and clamp gaps and corrodes the joints; and constant UV and humidity degrade thin coatings. The previous screens used non-marine-grade mesh and riveted frames, so they failed at every one of these points. The locks had also seized because cheap hardware corrodes from the inside.

The technical challenge was therefore not security alone, it was durability in one of the harshest microclimates in Sydney. Anything fitted here had to assume daily salt exposure, so the specification had to be marine-grade throughout: mesh, frame, fixings and finish. Getting any one element wrong would have repeated the same early failure.

  • Chlorides pit and stain non-marine-grade stainless steel
  • Salt water sits in screw and rivet penetrations and corrodes joints
  • UV and humidity degrade thin, low-quality coatings
  • Cheap locks and hardware corrode and seize from the inside

The solution: ForceField 316 marine-grade throughout

The recommended solution was Prowler Proof ForceField, built specifically for coastal conditions. ForceField uses single-piece 316 marine-grade stainless steel mesh, the alloy whose molybdenum content resists chloride corrosion far better than 304 grade, pressed into a fully welded, heavy-duty aluminium frame using Hidden Installation Technology so there are no exposed screws for salt water to enter. A hinged ForceField entry door was specified for the front, with matching security screens on the windows and a sliding ForceField unit for the rear alfresco opening that faces the breeze.

Frame colour was matched to the home's existing joinery in a quality factory powder coat for UV and salt protection, and the locking hardware was upgraded to a corrosion-resistant multi-point system. A premium installed coastal door of this type typically sits in the ,200 to ,600 range, which the owners weighed against having replaced cheaper screens twice already. Crucially, ForceField carries a 10-year full replacement warranty covering the whole door, not just the mesh.

  • Prowler Proof ForceField with single-piece 316 marine-grade mesh
  • Fully welded frame with Hidden Installation Technology, no exposed screws
  • Hinged front door, window screens and a rear sliding unit for airflow
  • Powder coat matched to existing joinery, with upgraded coastal locks

The installation: measured, manufactured, fitted to AS 5040

After the free measure, the doors and screens were manufactured to size at Prowler Proof's Australian facility, a process that typically takes one to two weeks. On install day the team removed the corroded old screens, prepared and checked each opening, and fitted the new units with three-point fixing into sound substrate, in line with AS 5040 installation requirements. Correct fixing into the building is critical: a tested door is only as secure as how it is anchored, and on the coast the seals and alignment also matter for keeping driven rain and salt out.

The whole installation for the front door, window screens and rear slider was completed in a single visit. Each lock was tested, the sliding track checked for smooth operation, and the owners shown the simple maintenance routine that keeps a marine-grade product performing. Because the work was done by a licensed local dealer rather than a travelling operator, warranty registration and any future support sit with a business minutes away in Engadine.

  • Made-to-measure at Prowler Proof's Australian facility in 1 to 2 weeks
  • Old corroded screens removed, openings prepared and checked
  • Three-point fixing into sound substrate to AS 5040
  • Front door, window screens and rear slider fitted in one visit

The result: airflow, views, security and a 10-year warranty

The outcome addressed every part of the brief. The home now has secure airflow on hot days without opening up to intruders, clear sightlines that preserve the ocean views the owners bought the house for, and a visible, professional deterrent at the front entry. Most importantly for a beachfront property, the 316 marine-grade specification is built to shrug off the salt that destroyed the previous screens, backed by a 10-year full replacement warranty rather than a short import warranty.

Maintenance is minimal: a fresh-water hose-down of the mesh and frame every two to four weeks to wash off salt before it settles, a periodic clean with warm water and mild detergent, and light lubrication of locks and the sliding track once or twice a year. The owners moved from replacing cheap screens every couple of years to a single quality fit-out designed to last a decade or more. If your coastal home is going the same way, call Steve on 0410 474 256 or email steve@shiredoors.com.au for a free measure and quote.

  • Secure airflow and ventilation on hot coastal days
  • Clear sightlines that preserve the ocean views
  • Marine-grade build with a 10-year full replacement warranty
  • Low maintenance: a fortnightly fresh-water rinse near the surf

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Frequently asked questions

Why did the previous security screens corrode so fast?

They were never specified for beachfront conditions. The old screens used non-marine-grade mesh and riveted frames, so salt chlorides pitted the mesh, water sat in the screw penetrations and corroded the joints, and cheap hardware seized. Within a kilometre of the Cronulla surf, only a marine-grade specification survives long term.

What security door suits a Cronulla beachfront home?

A door built to a full marine-grade specification: 316 marine-grade stainless steel mesh in a fully welded aluminium frame with a quality powder coat and corrosion-resistant locks. Prowler Proof ForceField meets this and carries a 10-year full replacement warranty, which is why it was chosen for this beachfront install.

How much does a coastal security door cost installed?

A premium installed coastal door such as ForceField typically ranges from about ,200 to ,600, depending on size, configuration and hardware. For a beachfront home that had already replaced cheaper screens twice, the higher up-front cost worked out cheaper per year over the door's lifespan.

Does a security screen still let the sea breeze through?

Yes. ForceField uses an open stainless steel mesh, so it allows airflow and light while resisting forced entry. A rear sliding security unit was fitted at this home specifically so the alfresco opening could stay open to the breeze on hot days while remaining secure and insect-proof.

How do I maintain a marine-grade door on the beachfront?

Rinse the mesh and frame with fresh water every two to four weeks to wash off salt before it settles, clean periodically with warm water and mild detergent and a soft brush, and lightly lubricate locks and any sliding track once or twice a year. Avoid abrasives, solvents, bleach and high-pressure washers.

Do you install security doors in Cronulla and the coastal Shire?

Yes. Shire Security Doors and Screens is based in nearby Engadine and is a coastal specialist servicing Cronulla, Bundeena, Burraneer, Kurnell and the surrounding coastal Shire with no local travel fees. Call Steve on 0410 474 256 or email steve@shiredoors.com.au for a free measure and quote.