Aluminium Repairs and Custom Flashings

Aluminium Repairs and Precision Flashings in Auckland for Lasting Weathertight Performance

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What we offer

From joinery repairs to custom-made flashings, we provide durable aluminium solutions built for Auckland conditions.
Red-framed two-panel window with grey reflective glass.

Aluminium Repairs

We fix worn, damaged or poorly performing aluminium joinery to restore smooth operation, weather-tight seals and reliable performance.

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Two concentric red square frames inside a larger black square frame on a white background.

Custom Flashings

Precision-made aluminium flashings tailored to your specifications for watertight protection and a clean architectural finish.

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Two wicker chairs with cushions on a white wooden balcony overlooking a sunset view, with a bedroom visible through sliding glass doors.

Aluminium Repairs

At Sonic Aluminium, we understand that even high-quality aluminium joinery can experience wear and performance issues over time. While aluminium is durable and resilient against rust, warping and corrosion, joinery that’s regularly used or exposed to harsh weather can gradually develop problems such as misaligned frames, worn seals, broken hardware and compromised window rubbers. Our expert repair services are designed to restore your aluminium windows and doors so they operate smoothly, safely and efficiently for years to come.

Our aluminium joinery repair services include realigning window and door frames that have shifted or become difficult to open and close, replacing worn-out or damaged seals and rubbers to improve weather-tightness and prevent drafts, and fixing or upgrading components such as stays, hinges, catches, locks and sliding door rollers. We also address issues like sash misalignment, sticking tracks and broken hardware to ensure every element of your joinery works as it should.

Regular maintenance and timely repairs not only extend the life of your aluminium windows and doors, they also enhance security, improve insulation and help prevent more costly problems down the track. From small residential jobs to complex commercial work, our team approaches each repair with precision, professional workmanship and a focus on lasting results.
Minimalist bedroom with large bed, two windows showing trees and sunset, wooden floor, white rug, and desk with computer.

Custom aluminium flashings

At Sonic Aluminium, our custom aluminium flashings are precision-crafted to protect your building from moisture and weather damage while enhancing the overall performance and durability of your aluminium windows and doors. Flashing plays a critical role in the building envelope by directing water away from junctions where joinery meets external cladding, preventing water ingress that can lead to dampness, rot and long-term structural issues. Flashings are a core component of weather-tight design and are defined in the New Zealand Building Code as components that drain or deflect water back outside the cladding system.  Crafted from durable, corrosion-resistant aluminium, our custom flashings can be powder-coated to match your joinery for a clean, professional finish.

Unlike off-the-shelf products, our custom flashings are made to exact measurements to suit your unique window and door openings, cladding profiles and architectural details. This bespoke approach ensures a precise fit that works seamlessly with different materials and design requirements — whether for residential homes or commercial buildings. Tailored flashings provide superior protection at critical points such as heads, sills, jambs and transitions, significantly improving the weathertightness of your structure.
Bright bedroom with a double bed, white bedding, two bedside tables with lamps, a desk with a computer monitor, and large windows showing an outdoor view at sunset.
"Very friendly service, would highly recommend and I'll be calling on Sonic Aluminium again for future projects.
Thank you again!"
Selena Francisco
Auckland
Modern living room with white sectional sofa, wooden floors, large sliding glass doors opening to a backyard patio with outdoor seating.