Welcome to
Gaster Aluminium

Gaster Aluminium primarily offer a full design, manufacture and installation service on both standard and bespoke architectural glazing packages. As a company we possess the ability to design and develop systems to meet an individual contracts requirement and often utilise many of the standard architectural glazing systems available in today’s market i.e. frameless glazing, structural glazing, patent glazing/curtain walling and shuffle glazing.

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+27 21 023 1680

About us

Gaster Aluminium is a BBBEE Level 1 certified, and also a member of the SAGGA. We are one of South Africa’s largest suppliers and manufacturers of aluminum architecture. Furthermore, we are experts in Aluminum entrance doors and screens, sliding patio doors, bi-folding doors, windows, garden patios roofs and roof systems. With factories and offices in Cape Town and Johannesburg, we fabricate in a state-of-the-art purpose-built facility.

Our skilled and customer-oriented fabrication technicians are all trained to the highest standards in each area of the factory, from material selection to designing the final products.

Gaster Aluminium delivers throughout South Africa as well as the Southern Africa region.

We are the Voice of the South African Aluminium Industry.

Over the years we have created some truly exceptional glazing for some incredible properties. Our skills and knowhow can help you figure out how to realise your dream vision.


Our products are considered by many to be the best in terms of aesthetics, quality, durability and performance. Explore our wide range of products below.

Entrance Doors

As the focal point to every home, ensure you make a bold statement with an exquisite aluminium door from Gaster Aluminum.

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Sliding Patio Doors

Our Aluminium sliding doors are a perfect choice if you have a large aperture to fill and want to enjoy undisrupted, panoramic views.

Garden Patio Roofs

We all look forward to summer days relaxing and enjoying the garden. Our garden roof patios will make the best of your outdoor living.

New Aluminium Windows

Our aluminium windows sit comfortably with the contemporary lifestyle; showing strength, elegance and undeniable chic.

Trellis Doors

Our Trellis doors have strong connecting components and rugged construction to provide maximum security and peace of mind.

Aluminium Roofs

Our many years of experience allow us to carry out aluminium roofing on a wide variety of buildings, both big and small, domestic or commercial.


We design, manufacture, supply and fit balustrades to both domestic and commercial customers. Your safety is our concern.

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At Gaster Aluminium, we specialise in double glazing, meaning your windows will withstand any kind of weather Mother Nature throws at you.

Our Customers

Our customers are delighted to repeatedly work with us and love to be associated with our brand. Here are some of them below:

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