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How long shutters need to stay down
Updated
They work while they cover the glass that is in sun. A south rear wall may want them down from late morning.
When the curtain has to be down
A west wall may want them down from mid-afternoon. Leaving them up for the view at the hottest hour is a choice, and the room will show it.
A size you can argue with
The worked opening for How long shutters need to stay down is 1.5 m wide by 2.1 m high, 3.15 square metres of glass. This figure puts 470 watts per square metre on the pane and uses a g-value of 0.76, about 1125 watts into the room if the curtain is up. An opaque external shutter, taken as stopping 90 percent of that gain while it is fully down, leaves about 112 watts and keeps about 1013 watts out. That is a noon figure for comparison. An internal blind does not get the same reduction. For How long shutters need to stay down, use the noon figure to compare two openings on the same house, then let a measured survey replace the figure.
An internal blind does not get that reduction, because the energy has already crossed the glass.
The night cover
Winter figure for How long shutters need to stay down: glass at 2.6 W/m2K, 3.15 square metres, a 12 degree inside-outside gap and eight night hours. The bare pane is about 0.79 kWh a night on that crude sum. A closed shutter cutting about 30 percent of the flow leaves 0.55 kWh and saves about 0.24 kWh a night, only while it is down. Open it when you want winter sun.
A bad reason to proceed
Stop How long shutters need to stay down if the only place for the box is a listed street front and nobody has written advice from the council. A photograph is not a manufacturing size.
Bath is only a setting for How long shutters need to stay down. The streets there are not the product.
How to use the figure
The 1.5 by 2.1 metre opening inside How long shutters need to stay down is there so a quote has something to disagree with. If the tape gives a different size, the tape wins.
The example drive is a solar motor, and the illustration is £2,694. A belt, a wired motor and a solar motor can share a curtain and still be different jobs. Compare those lines, not a single bold total.
What the survey still has to write down
For How long shutters need to stay down, ask where the box lands, what colour reference will be ordered, and how the curtain opens when the motor is dead. Those three answers move the job more than a rounded price.
Leave the lantern, the side light and the next elevation off the order unless they are drawn. How long shutters need to stay down covers one kind of opening. The house may have three.
When I would not order yet
How long shutters need to stay down should wait if the opening is an escape door with no way to raise a dead motor, or if the front is the elevation a conservation area was drawn to protect.
A photograph is not a manufacturing size. Two quotes for How long shutters need to stay down only compare when the slat, the box and the drive are the same kind of thing.
Questions worth asking the fitter
Is the price on this page a quote?
No. £2,694 illustrates How long shutters need to stay down for a 1.5 by 2.1 metre opening with a solar motor, at September 2026 rates. Your survey replaces it.
Does the shutter cover every pane?
It covers the opening it is built for. Here that example is 3.15 square metres. A roof lantern, a side light or the next elevation is another line.
What if planning is unclear?
Do not pay the factory for How long shutters need to stay down until a listed building, a conservation front, a flat or a shopfront has a written answer. Ordinary rear walls on houses are sometimes simpler.
What should two quotes share?
The same openings, the same slat type, and the same drive. How long shutters need to stay down uses a solar motor in the example so you can see how much the motor choice moves £2,694.