Steel to Aluminium Conversion for Modern South African Homes

Replace your older steel windows and doors with sleek, rust-free aluminium that looks better, costs less to maintain, and updates the feel of your home overnight.

A Cost-Effective Upgrade from Steel to Aluminium

In the past, steel was the material of choice for windows and doors. Times have moved on. Modern aluminium gives you the same strong, structural feel without the rust, the constant repainting, or the degrading glazing putty that steel demands year after year. Whatever you paid for your steel frames originally, keeping them in good condition gets expensive over time.

Sequ-Door specialises in full steel to aluminium conversion projects across Gauteng. We measure on site, manufacture your new aluminium doors and windows to fit your existing or modified reveals, and install neatly with minimal disruption. Outdated, rusty windows are replaced with secure, sleek, modern aluminium versions that don’t need hand-painting and don’t rely on degrading glazing putty.

Why Traditional Options Fall Short

Steel

Steel is prone to rust and corrosion. It must be hand-painted and relies on glazing putty that cracks and degrades over time, requiring repeated maintenance or full replacement.

Wood

Wooden frames rot, warp, and need regular varnishing and sealing to stay watertight. Meaning high upkeep over the long term.

Generic Aluminium

Off-the-shelf aluminium varies widely in build quality. Sequ-Door manufactures to AAAMSA specifications and glazes to SAGGA standards, independently tested for wind, water, and air performance.

Combine Style, Durability, and Performance

A steel to aluminium conversion brings your home or business into the modern era while solving the maintenance and corrosion problems that come with ageing steel frames.

No Rust, No Putty, No Repainting

Aluminium doesn’t rust or corrode, so the wire-brushing, rust-proofing, and annual touch-ups stop for good. It also doesn’t rely on glazing putty (the stuff that cracks, degrades, and eventually needs replacing on steel frames) so installations are quicker and there’s nothing to maintain down the line.

Modern, Powder-Coated Finish

Unlike steel, which must be hand or spray-painted, our aluminium windows and doors are available in factory powder-coated finishes for a polished, long-lasting appearance. Standard colours include Bronze, White, Charcoal, Black, and Silver, with a full range of non-standard and custom colours available including wood-look finishes.

Warmer Inside, Less Noise, Less Dust

Old steel frames warp, gap, and let the outside world in. Modern aluminium frames are precision-manufactured with proper seals and weatherstripping, so your home holds its temperature better in summer and winter, stays noticeably quieter against street noise, and lets in far less dust through the gaps. Pair with Low-E or double-glazed glass and the gains are even bigger.

Clean Installation: No Broken Plaster

For window conversions, our replacement channel fastens directly to the existing steel frame anchored in the wall, so there’s no need to break out plaster. Installations are quicker, far less messy, and the finished fit is extremely strong and neat. Your interior and exterior finishes stay intact.

Our Converted Solutions

Take a look at how we’ve replaced ageing steel windows and doors with modern aluminium across Gauteng homes and businesses.

FAQs

What’s involved in a steel to aluminium conversion?

We start with an on-site measurement, then manufacture your new aluminium windows and doors to fit. For windows, depending on the assessment, we can use a replacement channel that fastens to the existing steel frame anchored in the wall – so there’s no need to break out plaster. We glaze and finish neatly, and most installations cause minimal disruption to your interior and exterior finishes.

Will I save money compared to keeping my steel windows?

Over the lifetime of the frame, yes. Steel keeps demanding rust-proofing, hand-painting, and putty maintenance long after the upfront cost is forgotten. Aluminium eliminates those recurring costs.

Is aluminium really better than steel for windows and doors?

For most South African homes, yes. Aluminium doesn’t rust, doesn’t need hand-painting, doesn’t rely on glazing putty, and gives you a quieter, better-insulated home with a more modern look.

Can I keep the same window or door layout, just in aluminium?

Usually yes. We work with your existing reveals where possible and only modify or widen them when you want a larger or differently configured unit.

Are the aluminium doors and windows certified?

Sequ-Door holds both manufacturing and installation AAAMSA accreditations, and all glazing is installed in line with SAGGA standards. SAGGA Glazing Certificates are available on every applicable installation.

Will the new aluminium frames look as secure as my old steel?

Aluminium frames are robust in their own right, and we can pair them with our expandable security gates, burglar bars or security shutters where additional security is needed.

Will you have to break out the plaster around my windows?

In most cases, no. For windows, depending on the on-site assessment, we can use a replacement channel that fastens directly to the existing steel frame anchored in the wall, so your plaster stays intact. The result is a quicker, much cleaner installation with a strong, neat finish.