Mastering the Elements:
Alsysco’s Energy-Efficient Systems

South African winters can be surprisingly harsh. Whether you are bracing against the biting frost of the Highveld or weathering the driving storms of the Cape, keeping your home warm and protected is a top priority. While fireplaces and heaters do the heavy lifting, your home’s first line of defence against the chill is its fenestration, which you open and close daily – your windows, doors, and shutters matter.

Upgrading to high-quality aluminium systems is one of the smartest investments a homeowner can make to improve comfort during the colder months. Here is how Alsyco Aluminium windows, doors, and rebLOUVRE adjustable shutters can transform your living space this winter.

Superior Sealing and Thermal Comfort

Windows and doors are the most interactive components of any structure, and a significant amount of a home’s heat is lost through poorly sealed windows and doors. Older wooden frames can warp and shrink over time, creating gaps that invite icy draughts. Our aluminium systems help to regulate cold in two ways: firstly through double-glazed glass and secondly through the structural design of the aluminium itself.

Double Glazing

While a single pane of glass offers very little resistance to temperature changes, double glazing creates an insulating barrier. Heat naturally flows from a warm area to a cold area. As glass is highly conductive, a single-glazed window or door will easily allow heat loss. Double glazing disrupts the heat transfer that would occur with single-glazing by breaking this conductive path. Alsysco ThermEco® Sash 42 Casement Window, for example, easily accommodates up to 28mm double-glazed glass, providing a formidable physical barrier against heat loss.

Engineered for Superior Sealing

Alsysco Aluminium systems, unlike wooden frames or compromised generic systems, retain their structural integrity regardless of temperature fluctuations. Engineered for precision, with advanced weather seals and effective drainage systems, these frames lock out freezing drafts, icy winds, and driving winter rain.

By eliminating draughts, your home naturally stays warmer, reducing your reliance on expensive heating and ultimately lowering your electricity bills.

Maximising Winter Sun with Adjustable Shutters

The winter sun sits lower in the sky, offering a brilliant source of natural warmth if harnessed correctly. Shutters, like rebLOUVRE dynamic louvres, help to use the sun as best as possible during winter:

During the day: You can tilt the louvres to invite maximum sunlight and warmth into your living spaces, naturally heating the room.

During the night: Closing the shutters completely adds a vital extra layer of insulation over your glass windows, trapping the accumulated heat indoors and creating a barrier against the freezing night air.

Year-Round Energy Savings: The Data

The energy required to keep a building comfortable varies dramatically across South Africa’s distinct climate zones. By installing specific sun control solutions – such as our ThermEco® range of louvres and shutters – total annual energy consumption drops significantly across the board.

Johannesburg (The Highveld): The Highveld experiences freezing, dry winter nights. A thermally inefficient, unshaded building with clear single glazing consumes a massive 147.0 kWh/m² of total electrical energy annually to maintain temperatures. Installing 450 mm louvres at a 10° angle, combined with sealed fenestration, reduces the annual total to just 83.3 kWh/m².
Cape Town (Mediterranean Climate): Cape Town’s winters are notoriously wet, windy, and stormy, requiring highly effective weatherproofing and thermal retention. Unshaded, single-glazed buildings utilise 135.1 kWh/m² of total electrical energy over the year. The integration of 10° louvres dramatically brings this total down to 81.6 kWh/m², easing the burden on climate control systems year-round.
Durban (Coastal Humidity): Even in milder coastal winters, damp air and winds require efficient climate control. Baseline total electrical energy for an unshaded, single-glazed building sits at a heavy 173.4 kWh/m². By equipping the façade with a 10° louvre system, total annual consumption is slashed to 115.0 kWh/m².

*Figures for clear single glazing

Low Maintenance When It Matters Most

The last thing any homeowner wants to do in the middle of July is sand, varnish, or repaint weather-beaten window frames. Aluminium requires limited maintenance to keep it looking and performing at its best. In most cases, a simple wipe down with a damp cloth is all it takes to keep the frames pristine, freeing up your weekends to simply relax indoors.

The Bottom Line

Preparing your home for winter doesn’t just mean stocking up on firewood and blankets. By investing in modern aluminium windows, sliding doors, and adjustable shutters, you are securing long-term thermal comfort, lowering your energy costs, and adding enduring value and style to your property.

Because most customer complaints about cold drafts and winter leaks stem from poor specification or faulty installation, Alsysco reduces this risk by supporting a network of well-trained Accredited Fabricators. This ensures that the innovative, uncomplicated product design you select performs exactly as tested once installed in your aperture.

Ready to make your home cosy?

Find an Accredited Fabricator near you, request a free quotation, or download the latest brochures.

VISIT OUR SHOWROOMS

Cape Town Showroom: The Building Centre, 7 Platinum Dr, Ysterplaat, Cape Town, 7405
Johannesburg Showroom: Corner of Dame Street & Black Reef Road, Wadeville, 1428.
KwaZulu-Natal: Unit 6, Gillitts Industrial Park, 31 Gillitts Rd, Westmead, Durban, 3608
Opening hours: Monday to Friday: 8:00 AM – 5:00 PM, Saturday: 9:00 AM – 1:00 PM