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Blocout XL Cassette Blackout Blinds

BlocOut XL Cassette Blackout blinds system for larger regular rectangular shape windows. Formerly called Bloc 80 blinds, in other words, roller blinds plus side tracks and cassette head box.

The blind needs  a minimum width 400 mm, maximum width of 2400 mm. The minimum drop 300 mm,  maximum drop of 2400 mm. 120 mm clearance for handles or obstructions for recess fit. Side rails measures 50 mm wide plus 17 mm deep. 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 provides room darkening properties in larger window.

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 have a cassette box and side rails. Each blinds is 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.

By the same token, brush seals run down each channel in addition rubber seals aid energy saving. Similarly,  aluminium channels or tracks plus cassette headbox contributes to the blinds weight and strength.

Frame colours available include white/silver.

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 in home cinema rooms.


It is possible to fit The Blocout XL Cassette Blackout  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 ensures no cords, thus improving safety.

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

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.


Tip! 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.

Moreover, motorisation is best for larger windows.