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BlocOut XL Cassette Blackout Blinds

BlocOut XL Cassette Blackout blinds system has been introduced for larger windows that have a regular rectangular shape. The blinds were formerly called Bloc 80 blinds.  They can be made with a maximum width of 2400 mm and a maximum drop of 2400 mm. A minimum of 120 mm clear of any handles or obstructions is required if fitted in the recess. The side rails are 50 mm wide 17 mm deep. If surface mounted, an additional 140 mm is added to the top of the window opening and 100 mm on the width to allow for clearance so that the blind can operate correctly. Blocout XL Cassette Blackout Blinds also darken rooms.

How Blocout XL Blinds Contrast With The Smaller Blocout Blinds

In the first instance both Blocout Blackout Blinds work in a similar way. Both blinds has a cassette box and side rails. Each Blinds are adept at keeping the warmth in a room and block out light. Yet, the larger Blocout XL blind is operated by a metal chain as opposed to the spring blind. The chain can lift the extra weight the smaller spring system can’t handle.

Both blinds are suitable for night workers or keeping the sun’s rays at bay during the summer months. In addition, the blinds prevents TV glares.


It is possible to fit The Blocout XL blinds in the recess or surface mounted. In contrast it is possible to fit the smaller Blocout Blinds on the window edge, recess or surface.

However, all blinds must be fitted squarely. If the reveal is not square, wood can be used to pack out the recess/reveal.

The blinds have been tested by the British Blind & Shutter Association on their ability to reduce heat loss from a window and it found a 43% reduction in heat loss. As a result, it has won awards for its design.


Most of all the Blocout XL Cassette Blind can be motorised rather than chain operated. Motorisation as a result makes the blind has to cords.

Please email a photo or two along with measurements of any window you wish to dress using this blind.

Please order a sample/ samples to check the properties of the fabric and colour as monitors and devices can distort the real colour of a fabric.


Measure where you wish to fit the blind. Use a pencil to mark the measurements, in order to have an idea when it comes to fitting.

NB  Fabric maximum width 2000 mm on most fabrics.  As a result, larger cassette blinds with wide widths or drops will been joined to obtain the chosen sizes.

In addition, in order to operate Blocout XL cassette blackout blinds, motorisation is advised.