Pleated fabric forming hexagonal air cells — trapped air that insulates the glass in both directions. On a new estate, before the garden's grown in to help, that buffer does more of the work.
An established Johannesburg garden shades a good part of a home's glass by mid-afternoon. A newly planted Helderfontein garden doesn't — not for years. Until then, a cellular blind's trapped-air structure is doing some of the job the trees will eventually take over: a soft thermal buffer that keeps rooms more comfortable in both directions, and quieter too, since the cells absorb sound as well as heat.
We keep the claims honest — comfort and a lower heating/cooling load, not invented percentages.
Single cells suit milder rooms and lighter budgets. Double cells are the serious thermal option — worth the extra spend on the room above the garage that's always the coldest in winter and hottest in summer, a familiar complaint in double-storey new-estate builds.
Top-down/bottom-up operation gives privacy at the bottom with light and sky at the top — useful for street-facing new-build windows before hedging or boundary planting has filled in. Cordless and motorised operation are both available; see our automation page for whole-house control. The cell structure also holds its shape on skylights and angled glass, which flat fabrics can't manage as cleanly.
Cellular blinds sit above a plain roller on price because the honeycomb is doing insulation work as well as light work — which is exactly why they suit a double-volume stairwell. Per square metre installed: R1,500 to R2,800 with a cordless or corded lift, and R3,000 to R4,800 motorised. Double cells, blockout-lined fabrics and top-down-bottom-up head rails all sit near the top of each band.
A narrow opening carries a minimum charge, because the head rail, the brackets and the visit are the same work whatever the width. Use the bands to plan a budget; the real per-window figure follows the free measure and comes to you in writing.
That insulation buffer matters most where a garden hasn't had time to grow in yet — which describes most of this corridor. We fit cellular and honeycomb blinds in new and recently-landscaped homes across Fourways, Dainfern, Broadacres & Cedar Lakes and Steyn City, not only inside Helderfontein Estate.
Free in-home measure, written per-window quote, no pressure.