For Medium to Large Roof Lanterns
WindowTreat’s electric roof blinds have been engineered with no visible cords. The roof blind systems have manufacturing physical limitations on how wide or long they can be. WindowTreat’s focus is ensuring that your chosen fabric will be aesthetically suitable for your home so sometimes the recommendation will be to use a more powerful roof blind. Heavier fabrics require more applied tension with stronger hem bars to get the desired finish. The diagrams below demonstrate the physical limitations and recommended sizes for the given roof blind. Our roof blind specialists are at hand to assist you further so book in an appointment today.
The Venus Electric Roof Lantern Blind is engineered so the fabric looks great without visible cords on larger sized roof lanterns
Watch this short video of the Venus electric roof lantern blind in action!
The Venus is our entry-level roof blind system. Within its limitations and depending on your fabric requirements it will give a good cloth finish without any visible cords. It boasts a symmetrical look with easy to clean cassette boxes at both ends. Inside the cassette boxes, the engineering brilliance of the Venus Electric Roof lantern blind is hidden away from dust, flies and view allowing it to blend into your lantern’s upstand. (White is standard but any RAL colour can be offered).
At one end of your Venus roof blind is either an 85mm² or 110mm² cassette headbox depending on the length of your upstand. Over 2.5m and up to 3m in length require the larger cassette box to conceal the additional fabric. Unlike pleated blind systems that concertina at one end gathering dust, your chosen Venus fabric is always protected when not in use. At the other end of your blind is the symmetrical tension box. This contains two tension springs that provide the power to keep your chosen fabric taut via hidden white nylon cords. These constant tension springs average a combined tension of 8kg, however, these springs lose power as the fabric is deployed from a combined 10.4kg to 6.4kg. When considering heavier fabrics (such as blackout) on lanterns longer than 2.5m then the Hermes or Zeus electric roof blinds may be a better option. Make an appointment to discuss further with the WindowTreat electric roof lantern blind specialists.
The Venus electric roof lantern blind has slimline side channels 28mm wide supported by the 50mm shelving. They play an integral part in the ‘no visible wires’ Venus electric roof lantern blind system. The 1.5mm nylon cords used to withstand the power of the 4kg tension springs are hidden inside both side channels. The zipper ribbon technology is welded to the edges of your chosen blind fabric creating a very strong join. The zipper ribbon is securely held and prevented from being pulled out of the channels. It allows the blind to run freely and quietly along these channels whilst returning the fabric squarely onto the motor tube every time it is used.
The shelving is a critical part of the Venus roof blind system. The powder-coated L-angle profiles allow the electric roof lantern bind to sit squarely within your opening even when your lantern opening is not truly square (after the final skim your lanterns opening is rarely truly square) It also ensures there is no light ingress around the sides. The shelving at both ends is 170mm. This allows the Venus slimline hem bar to disappear above the shelf at both ends keeping a uniform look with just the fabric on show. On smaller Venus roof blind systems an 80mm shelving can be used if preferred. The side shelving supporting the systems side channels are a slim 50mm.
The Venus slimline 35mm hem bar has been designed to perform and not simply look good. It is suitable to withstand the 8kg of tension applied to it by the Venus electric roof blind allowing for elegance within small to medium-sized roof lanterns. When considering more powerful roof blind systems this slimline hem bar would no longer be viable.
The grey fuzzy brush on the end of the Venus Slimline hem bar is also known as the Crush Brush. It creates a seal between the hem bar and the tension box when your blind is closed. It also allows it to close quietly to avoid the sound of metal on metal. Grey is standard but sometimes black is used when maximising room darkening. White is only permitted when using a white screen fabric as it lets considerably more light transmit through it.
Not all SOMFY motors are equal and can be used in our specialised roof blinds. Due to the power created by the Venus electric roof blind, only a motor with sufficient torque can be selected. This allows your blind to defy gravity and travel horizontally at a controlled speed whilst maintaining tension on the fabric.
The Venus Electric Roof Lantern blind uses a SOMFY Radio Transmitted Signal (RTS) motor as standard. This allows you to control your blind using a remote-control handset or remote-control wall-switch. The Venus SOMFY RTS motor is compatible with the SOMFY Tahoma Switch which offers a simple gateway to smart living.
Alternatively, hardwired Somfy motors can be used on request which will allow compatibility with existing home automation systems such as Lightwave, Control-4 & Lutron
A fabric portfolio designed for outstanding performance so that your roof blind requirements are assured.
This screen fabric has a very tight weave lending itself to roof lantern blinds requiring nighttime privacy, winter insulation and high levels of light management
The lighter colours offer better solar heat rejection and the darker colours offer better glare protection. Note the White Grey offers a good combination of both for a cooler living space with TV glare protection.
Strong, stable and in a wide width it offers your Venus roof lantern blind a seamless finish designed for longevity at high tension.
This fabric allows a view out and therefore does not offer night time privacy. It does however offer a connection with the out door enviroment. This fabric range offers good heat rejection and much highter light levels than the Tightweave range.
Strong, stable and in a wide width it offers your Venus roof lantern blind a seamless finish designed for longevity at high tension.
This metallised fabric has unrivalled heat rejection.
If your living space suffers from excessive heat gain then this fabric is a great consideration for your Venus Large electric roof lantern blind. The composition of the fabric means you have excellent heat rejection in all the colours and the glare control always remains the same. White fabric in this range will not get the typical lightbox effect experienced with some of the fabrics in the portfolio such as the Solaye Sunshadow 3000HT White Yarn
Heat Metallised |
Solar Reflectance (Rv%) |
Light Transmission (Tv%) |
White |
75% |
5% |
Pearl |
75% |
5% |
Linen |
75% |
5% |
Grey |
75% |
5% |
The blackout range allows ultimate room darkening for bedrooms, cinematic TV rooms or simply because your bi-folds or sliding doors already offer high levels of light.
Winter insulation is a given with this fabric range with summer heat gain reduction best achieved with the lighter colours.
The PVC range gives a false ceiling effect making it very popular.
Blackout |
Solar Reflectance (Rv%) |
Light Transmission (Tv%) |
White |
77 |
0 |
Bone |
72 |
0 |
Sand |
62 |
0 |
Platinum |
49 |
0 |
Dark Grey |
27 |
0 |
Black |
4 |
0 |
The blackout range allows ultimate room darkening for bedrooms, cinematic TV rooms or simply because your bi-folds or sliding doors already offer high levels of light.
This fabric will offer excellent heat rejection in any chosen colour as well as good winter insulation The colour is an interior design choice as all the fabric colours perform equally in terms of light management, summer heat rejection and winter insulation.
Blackout |
Solar Reflectance (Rv%) |
Light Transmission (Tv%) |
Ice White |
73 |
0 |
White |
73 |
0 |
Ivory |
73 |
0 |
White Grey |
73 |
0 |
Sand |
73 |
0 |
Charcoal |
73 |
0 |
Charcoal |
73 |
0 |
Charcoal |
73 |
0 |
The powerful SOMFY® motor connects your Venus Electric Roof Lantern Blind to your home.
The standard Somfy motors for the large Venus electric roof blinds use radio technology. This enables you to have a choice between a remote handset or a wireless wall switch included in your investment
A simple press of a button on your chosen remote control device sends out a radio wave signal to operate your roof lantern blind. You don’t even need to point the handset at your roof blind. The radio waves are omnidirectional and operate to a range of over 15 metres in any direction.
Somfy radio technology utilizes a rolling code with 16 million combinations to ensure that RTS communication is both safe and secure. This ensures that your controls will not interfere with other radio-controlled products in your home or adjoining neighbours.
The Somfy Tahona Switch puts you in control of your Venus electric roof lantern blind whether you are home or not. With the ability to control your Venus roof blind from anywhere in the world through the Tahoma App on your smartphone or tablet.
The Somfy Tahoma offers your roof lantern blind intelligence so that you get the very most from your investment. Let Tahoma take control while you and your family focus on enjoying life.
Tahoma’s Timer settings can automatically open and close your roof blind at pre-set times. Natural light in the morning for breakfast but closed in the evening for cosy family time.
In addition, the Sunis IO Sensor can talk to your Tahoma. If there is too much direct light passing your lantern your roof blind fabric will close. This intelligence ensures that when you get home your living space has been kept cool from the summer heat without you having to give it a second thought.
This is a must for customers who are concerned about the fading of their wooden flooring and furnishing from sun damage.
Still not impressed? The Tahoma is compatible with third-party devices such as Amazon Alexa, Google Assistant & Apple Homekit to allow you and your family to use voice control to operate your blind
Look up to the sky with no obstructions. When you want to make your blinds appear out of nowhere, you can! Blindspace boxes conceal your roof lantern blinds and skylight blinds, making them disappear and allowing a full view of the sky and stars when the blinds are open.
Our customers were once investigating electric roof lantnern blinds. Discover why they chose WindowTreat
A genuine warranty designed for customers. Caring beyond the installation
Your investment in WindowTreat's superior electric roof blind is protected by a 5-year 'peace of mind' warranty.
This covers all aspects of the roof blind system to function correctly. Any failure of the motor, fabric stitching, zip teeth or blind components will be rectified free of charge during the 5-year period after the installation.
The fabrics are UV stable, anti-microbial and flame retardant. Minor variations in fabric colour may occur over time but are considered standard wear and tear.
Any damage caused by accidents, misuse or unauthorised modifications to the roof blind system and fabric is not covered by this warranty. Example being -
From £2,800 Including VAT, Survey & Installation
- Steve Gargett, Managing Director of WindowTreat