What are Polystyrene Banding & Dado Moulds?

Exterior banding and dado moulds are elevated architectural features installed horizontally or vertically across a building’s exterior walls. Historically used to conceal structural joins between floor levels or transition between different wall cladding finishes, modern exterior banding serves a vital aesthetic purpose. It breaks up vast, plain walls, creates dramatic light and shadow lines, and gives residential homes and commercial developments a refined, high-end architectural finish.

At Thermatech, our architectural banding and dado moulds are manufactured using high-density expanded polystyrene (EPS), finished with a tough, weather-resistant exterior coating. While traditional exterior mouldings were crafted from heavy concrete, sand-and-cement plaster, or timber, modern architectural trends have shifted heavily toward lightweight polystyrene profiles due to their durability, structural efficiency, and ease of installation.

Why Choose Polystyrene Banding & Dado Moulds?

Upgrading your building’s exterior with lightweight EPS profiles provides distinct structural and financial advantages over old-school masonry trims:

• Zero Structural Load: Heavy concrete mouldings add significant dead weight to a building’s frame and foundation, often requiring extra steel support or concrete fixings. Polystyrene profiles are feather-light, adding zero structural stress to timber framing, brickwork, or lightweight wall cladding.
• Rot and Weather Resistance: Timber banding expands, shrinks, cracks, and eventually rots when exposed to rain and sun. Our rendered polystyrene moulds are completely weather-resistant, decay-proof, and designed specifically to endure Australia’s tough weather conditions.
• Unlimited Design Flexibility: Whether you need a sleek, flat modern border to separate a lower brick facade from upper cladding, or a multi-stepped classical profile to give a grand entry presence, polystyrene can be custom-cut to match any custom detail or heritage profile.

Effortless On-Site Installation for Trades & DIYers

One of the largest hidden costs in exterior rendering and building facade work is labor. Traditional masonry mouldings require multi-person crews, heavy lifting gear, and complex structural anchoring.

By contrast, Thermatech polystyrene banding profiles can be fitted quickly by a single installer:

1. Easy Handling: Long lengths can easily be carried, maneuvered, and positioned up ladders or scaffolding without specialized lifting equipment.
2. Simple Cutting: Profiles can be cut cleanly to size directly on site using standard handsaws to create seamless 45-degree mitred corners.
3. Adhesive Fixing: Mouldings are secured directly to rendered brick, AAC panels, or exterior cladding using specialized masonry construction adhesive, with minimal mechanical fasteners required.
4. Ready for Paint: Once installed and jointed, they are ready to accept any good quality exterior acrylic paint suited for masonry surfaces. 

Fast, Reliable Delivery Australia-Wide

Whether you are a builder or a homeowner completing a weekend renovation, Thermatech delivers directly to your site or doorstep across Australia. We take extreme care in packaging our mouldings to ensure every length arrives straight, undamaged, and ready for immediate installation.

Transform your home’s facade today with Australia’s trusted supplier of lightweight polystyrene architraves and sills. Contact Thermatech today to request a catalogue or get an obligation-free quote on custom banding profiles.

View some example projects on our Instagram page.

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