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What a domestic shutter actually stops
Updated
A locked aluminium curtain over glass stops the casual shove, the opportunist who wanted the bifold to be an open invitation, and the feeling of a dark house advertising itself. It delays a determined attack.
What the wall will allow
Use it for the hours the house is empty or asleep, and keep ordinary locks for the hours the glass is open.
A worked pane
The worked opening for What a domestic shutter actually stops is 2.4 m wide by 1.2 m high, 2.88 square metres of glass. This figure puts 470 watts per square metre on the pane and uses a g-value of 0.7, about 948 watts into the room if the curtain is up. An opaque external shutter, taken as stopping 85 percent of that gain while it is fully down, leaves about 142 watts and keeps about 806 watts out. That is a noon figure for comparison. An internal blind does not get the same reduction. For What a domestic shutter actually stops, 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.
After dark
Winter figure for What a domestic shutter actually stops: glass at 1.4 W/m2K, 2.88 square metres, a 12 degree inside-outside gap and eight night hours. The bare pane is about 0.39 kWh a night on that crude sum. A closed shutter cutting about 24 percent of the flow leaves 0.29 kWh and saves about 0.09 kWh a night, only while it is down. Open it when you want winter sun.
Stop conditions
Stop What a domestic shutter actually stops 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.
Norwich is only a setting for What a domestic shutter actually stops. The streets there are not the product.
How to use the figure
The 2.4 by 1.2 metre opening inside What a domestic shutter actually stops 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 wired motor, and the illustration is £2,098. 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 What a domestic shutter actually stops, 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. What a domestic shutter actually stops covers one kind of opening. The house may have three.
When I would not order yet
What a domestic shutter actually stops 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 What a domestic shutter actually stops 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. £2,098 illustrates What a domestic shutter actually stops for a 2.4 by 1.2 metre opening with a wired 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 2.88 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 What a domestic shutter actually stops 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. What a domestic shutter actually stops uses a wired motor in the example so you can see how much the motor choice moves £2,098.