Engineered for Exposure
StormBloc™: The External Door That Never Needs Repainting
Colorbond steel on both faces. RotGuard™ treated pine on all four edges. Engineered composite core. No repainting. No rotting bottoms. No maintenance callbacks. From $2,200 inc GST supplied and installed. Final price depends on door size, frame condition, and extras identified in your photos.
The Problem
Why External Doors Fail
Every external door in Melbourne is fighting the same battle, and most of them are losing it at the bottom edge.
Moisture Wicking
Rain hits the door, runs down, and pools at the base. The bottom edge is end grain. Cut across the fibres. End grain absorbs moisture faster than face grain. Even painted doors wick water upward into the core.
UV Damage
Sun on one face, shade on the other. The door expands unevenly. That’s what causes warping, jamming, and gaps around seals. Melbourne’s UV breaks down most paint finishes within two to three years.
The Repaint Cycle
The door needs repainting every three to four years. Most homeowners don’t get to it until damage is visible. By then, moisture has already entered through cracks in the finish.
Core Failure
MDF and hollow-core doors absorb water like a sponge. Solid timber lasts longer but still rots at the bottom edge. The fundamental problem is the same. Moisture enters through end grain.
Proprietary Technology
RotGuard™: Decay Stops Here.
The bottom edge is where doors die. RotGuard™ addresses that failure point directly. Treated pine perimeter press-bonded to all four sides of the door. Not just top and bottom, all four edges.
The critical detail: the bottom edge of a RotGuard™ door can remain unpainted and still resist moisture. Traditional doors need paint on the bottom edge as their only defence, and that paint breaks down within a few years. RotGuard™ eliminates the dependency on paint as a moisture barrier.
Construction
Built Different. On Purpose.
Every layer of a StormBloc door serves a specific engineering function.
Colorbond 0.7mm Steel on Both Faces
Factory-finished by BlueScope Steel. UV-stable colour that doesn’t fade, peel, or chalk. The same material on roofing and fencing across Australia. Neither side ever needs painting.
RotGuard™ Treated Pine Perimeter
All four edges wrapped in treated pine. Resistant to decay, moisture wicking, and fungal attack. The bottom edge can remain unpainted. Press-bonded to the core.
Engineered Composite Core
Cross-laminated layers hold the door flat through Melbourne’s temperature swings. The engineered composite core resists the expansion and contraction cycles that warp solid timber doors.
Press-Bonded Construction
Steel skins bonded to the engineered composite core under pressure. No air gaps. No delamination over time. The door behaves as a single structural unit.
Your Options
Four Variants. One Platform.
All built on the same StormBloc™ platform with RotGuard™ and Colorbond steel. Prices for the standard 820 x 2040mm size, supplied and installed. Final price depends on door size, frame condition, and extras identified in your photos.
Core
From $2,200 inc GST supplied and installed
Solid Colorbond panel. No glazing. Maximum privacy, maximum weather resistance. The go-to for laundry doors, side entries, and garage access doors.
Best for: Utility doors where you don’t need glass.
Vision
From $2,700 inc GST supplied and installed
Small vision panel for light and line-of-sight. Enough glass to see who’s at the door without opening it.
Best for: Front and rear doors needing visibility.
Half Light
From $2,700 inc GST supplied and installed
Half-height glazing in the upper portion. Brings natural light into hallways and entries.
Best for: Front doors and rear doors where light matters.
Extreme
From $2,500 inc GST supplied and installed
Heavy-duty for maximum exposure. Coastal properties, fully exposed western faces, zero shelter positions.
Best for: The harshest conditions.
Where It Goes
Every External Door. One Solution.
StormBloc™ is the default recommendation for any external door that faces weather without adequate protection.
Laundry Door
Moisture from both sides. Steam inside, rain outside. The worst position in the house for a timber door.
Garage Access Door
Damp, poorly ventilated. The bottom edge sits on a concrete slab that wicks moisture constantly.
Rear Door
South-facing rears cop Melbourne’s worst weather. No awning, no porch, no protection.
Side Door
Narrow passages between houses where moisture sits and airflow is poor. These doors rot faster than any other.
FAQ
Common Questions
How much does a StormBloc door cost?
StormBloc™ Core starts at $2,200 inc GST supplied and installed for the standard 820x2040mm size. Vision and Half Light are around $2,700 inc GST each. Extreme is $2,500 inc GST (adds the reinforced edge cap). All prices include the door, hardware, weatherseals, and professional installation. Final price depends on door size, frame condition, and extras identified in your photos.
What colours are available?
22 Colorbond colours from BlueScope’s standard palette. The same range used on roofing, fencing, and cladding across Australia. If you have Colorbond on your roof or fence, your StormBloc™ door can match it exactly.
Is StormBloc suitable for front doors?
Yes. The Vision and Half Light variants are popular for front doors. They include glass panels for light and visibility while maintaining the weatherproof construction. For a purely decorative front entrance, our architectural timber range may suit better.
How long does installation take?
The install itself takes a few hours. From order to install, StormBloc™ doors are supplied and installed within 28 days. Your house is never left without a door overnight.
Can I paint a StormBloc™ door?
You don’t need to. The Colorbond finish is factory-applied, UV-stable, and designed to last decades without recoating. That’s the point. Zero maintenance.
What’s included in every StormBloc™ quote:
- StormBloc™ door with Colorbond® steel faces, RotGuard™ sealed perimeter, insulated core
- Your choice of 22 Colorbond® colours, factory finished
- Zanda Zenith entrance hardware (handle + deadbolt, keyed alike)
- 3 × stainless steel hinges
- Weatherseals fitted
- Removal and disposal of the old door
- Full installation by our team
- 10-year structural warranty on the StormBloc™ door
- 2-year workmanship warranty on the install
From $2,200 inc GST supplied and installed. Quote from photos in 24 hours. No site visit needed.
Ready?
Replace Your External Door With StormBloc™
Send us a few photos of your door and the position it sits in. We’ll confirm whether StormBloc™ is right for your situation and recommend the variant that suits. Most StormBloc™ projects can be quoted from photos alone.
Takes less than 60 seconds.