Local Shutter InstallersSecurity · Survey
Extruded slats and foam-filled slats
Updated
Foam-filled double-skin slats are the thermal and domestic default. Extruded slats are solid aluminium and are what security ranges use when they want a harder curtain.
Sun, in watts
The worked opening for Extruded slats and foam-filled slats is 2.4 m wide by 1.5 m high, 3.6 square metres of glass. This figure puts 545 watts per square metre on the pane and uses a g-value of 0.76, about 1491 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 149 watts and keeps about 1342 watts out. That is a noon figure for comparison. An internal blind does not get the same reduction. For Extruded slats and foam-filled slats, 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.
On this opening
The heavier curtain needs a stronger axle, guides and fixings. Swapping the word 'security' onto a foam slat does not perform the swap.
The same glass in winter
Winter figure for Extruded slats and foam-filled slats: glass at 2.6 W/m2K, 3.6 square metres, a 12 degree inside-outside gap and eight night hours. The bare pane is about 0.90 kWh a night on that crude sum. A closed shutter cutting about 30 percent of the flow leaves 0.63 kWh and saves about 0.27 kWh a night, only while it is down. Open it when you want winter sun.
I would not order yet
Stop Extruded slats and foam-filled slats if the solar panel would sit in a soffit with no sky, and the quote has no wired alternative. A photograph is not a manufacturing size.
Aberdeen is only a setting for Extruded slats and foam-filled slats. The streets there are not the product.
How to use the figure
The 2.4 by 1.5 metre opening inside Extruded slats and foam-filled slats 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 £2,822. 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 Extruded slats and foam-filled slats, 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. Extruded slats and foam-filled slats covers one kind of opening. The house may have three.
When I would not order yet
Extruded slats and foam-filled slats 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 Extruded slats and foam-filled slats 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. £2,822 illustrates Extruded slats and foam-filled slats for a 2.4 by 1.5 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 3.6 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 Extruded slats and foam-filled slats 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. Extruded slats and foam-filled slats uses a solar motor in the example so you can see how much the motor choice moves £2,822.