What Summer Does to Your Windows in Dubai
From June to September, daytime temperatures in Dubai sit at 40–45°C and the sun stays close to overhead for most of the day. Glass on south- and west-facing windows heats up to 50–60°C and starts working like a radiator: even with the window shut, heat keeps coming into the room as radiation from the hot pane. Apartments with floor-to-ceiling glazing facing west have it hardest, because between 14:00 and 19:00 the sun hits those windows almost head-on.
Air conditioning is what drives the DEWA bill in these months. By DEWA's own estimate, cooling accounts for roughly 60% of household electricity use in summer. The tariff is also tiered: the more kilowatt-hours your home burns through in a month, the higher the rate on each additional unit. Anything that cuts heat gain through the glass saves you money twice, on the amount of energy you use and on the price of every unit.
Fabrics and Window Treatments That Keep the Heat Out
The basic principle is to reflect solar heat before it enters the room rather than fight it once it is inside. Fabrics with a light or metallised backing facing the glass do this best: they bounce part of the radiation straight back outside. A dark, unlined fabric does the opposite, soaking up the sun and re-radiating warmth into the room like a heated panel.
For floor-to-ceiling windows facing west, a single layer is often not enough, even a dense one. In those rooms a screen roller blind next to the glass is usually combined with a lined curtain, and in the harshest cases a solar film goes on the glass itself. The film does not replace curtains, but it takes part of the load off the air conditioning.
- Screen fabrics with a 1–3% openness factor: they preserve the view while blocking up to 80–90% of solar heat; choose 1% for west-facing windows.
- Acrylic-coated blackout: a three-layer fabric that shuts out light completely and noticeably reduces heat gain; in summer it is a must for bedrooms.
- Thermal lining: turns an ordinary curtain into an insulator, and it can be sewn onto curtains you already own.
- Honeycomb (cellular) shades: the air trapped inside the cells works like a thermos, making them one of the best options for panoramic glazing.
- A light-coloured backing towards the glass: a white or pearl layer reflects more than any dark fabric.
Two Layers, Two Jobs: a Day and Night Setup
No single curtain covers both scenarios. During the day you want sun protection without losing daylight; in the evening you want privacy and darkness for sleep. That is why a double system makes sense for the summer: a screen roller blind or light fabric next to the glass, plus a dense curtain or blackout as the second layer on a double track.
In the daytime only the inner layer works: the room stays bright while the sun is filtered out. Towards evening, when the west facade is at its hottest, both layers close. The pocket of air between them adds extra insulation, so the air conditioner does not spend the whole night fighting a warm pane of glass.
The Summer Routine: When to Close Your Curtains
Curtains only save energy if you close them before the peak, not after. Lower the blinds at noon, when the room has already heated up, and the AC will spend another hour pumping out the stored warmth. A working schedule by orientation: east-facing windows stay closed from early morning until 11:00, south-facing from 11:00 to 15:00, and west-facing from 14:00 until sunset.
Nobody keeps to a schedule like that by hand, which is where motorisation pays off: a timer or a light sensor closes the curtains on its own, even when no one is home. And if you leave Dubai for the summer, keep the screens or blackouts closed while you are away. Three months of direct sun through bare windows is enough to fade furniture, fabrics and wooden floors.
Pre-Summer Checklist: Get the Curtains Themselves Ready
The curtains need preparing too. In summer they work every day, and the dust left by spring sandstorms combines with August humidity and settles deep into the fabric. It is easier to get the cleaning and a mechanical check done before the heat arrives, while dry cleaners and installers are not yet buried in seasonal orders.
If your curtains are more than five or six years old and the fabric has visibly faded, early summer is a sensible time to replace them: sun-bleached cloth loses density and reflects less heat. Made-to-measure curtains take 4–5 business days to sew at Solara Design, and the measurement visit is free, so an order placed in June is still ready well before the hottest stretch in July and August.
- Wash or dry-clean curtains and sheers: most light fabrics can be machine-washed at 30°C, but check the care label first.
- Brush roller and screen panels with a dry, soft brush; lift stains with a slightly damp sponge without rubbing.
- Check the hardware: roller blind chains, glider movement along the track, and how firmly the brackets are fixed.
- Charge or replace the batteries in motorised curtains and test the timers and scenes in the app.
- Inspect the window seals: a gap in the frame undoes the effect of any curtain.
Want your windows summer-ready without the guesswork? Book a free measurement with Solara Design: our specialist brings screen and blackout samples, calculates options for your exact windows and orientation, and tailoring with installation takes 4–5 business days.