42mm Double Line

42mm Double Line Roller Shutter

The 42mm Double Line is a roll-formed aluminium roller shutter with a double line grooved, curved face profile, installed by LT Doors on windows and doorways across Wollongong and the Illawarra. It's a residential and light commercial shutter, foam-filled for extra strength and quiet operation.

Built for Wollongong's coastal conditions

Wollongong's older weatherboard and brick veneer homes, from Wollongong CBD out to Port Kembla and Coniston, suit the 42mm Double Line well as a straightforward, budget-conscious window shutter — it's foam-filled for insulation and noise reduction against nearby traffic, and the double-coated, lacquered finish holds up to coastal humidity without excessive maintenance.

what LT doors thinks

This is the shutter we recommend when a client wants solid, no-fuss window security and privacy without paying for a widespan or high-security profile. The grooved double-line face gives a slightly more textured look than the Single Line's smooth face — it's a styling preference more than a performance difference, since the specifications are otherwise identical. If you'd prefer the flatter look, compare the 42mm Single Line.

Key features

• Construction: high-quality aluminium alloy, foam-filled profile for strength and silent operation
• Profile: double line grooved and curved face
• Finish: high-quality painted finish, double-coated plus lacquer for abrasion resistance
• Strength: machine-inserted profile end clips, high-quality internal sealed bearings
• Widespan: suitable for widths up to 3200mm
• Operation: roll-tight design, manual or motorised
• Made in Australia

What makes the 42mm Double Line different

A lot of entry-level shutters are a single, unfoamed aluminium strip — quiet operation and insulation are add-ons elsewhere. The 42mm Double Line's foam-filled profile (CFC-free polyurethane) is built in from the start, and the double-coated, lacquered finish is a step up from a single powder coat for long-term abrasion resistance.

Colours and finishes

Profile options include Cream, Magnolia Cream, Clear Beige, White, Shale Grey, Brown, Beige, Green, Red, Black, Monument, Silver, Deep Ocean and Woodland Grey. Pelmets, side frames, guides and bottom bars come in Cream, Magnolia Cream, Clear Beige, White, Shale Grey, Black, Monument and Woodland Grey, with powder-coated options available at extra cost. 

Which roller shutter should you choose?

For the same size window or doorway with a flatter face, compare the 42mm Single Line. For a wider opening, the 55mm or 77mm Widespan profiles cover larger windows, doorways and garage doors. If added security against forced entry matters, the LockSafe is built on this same 42mm profile with a patented locking upgrade.

Installation, warranty and upgrades

Measured, supplied and installed by LT Doors' licensed local team, backed by a written workmanship guarantee. Can be manually operated (strap, cord or steel cable winder) or motorised, including with the PowerSmart or SolarSmart Plus automation systems.

Next Steps

Get a free, fixed-price quote for 42mm Double Line roller shutters from LT Doors, Wollongong's local roller shutter specialists. Call or request a quote online.

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