# Cased Duette Blind System
Source: https://www.fenetresystems.com/en/cased-duette-blind/

# Cased Duette Blind

Enclosed cased double-layer arrangement with side rails. The tightest form collecting darkening and insulation in one body.

## How Does the Cased Double Layer Work?

The enclosed rail covers the edge; nested cells wrap the glass plane.

In the cased system the double-layer honeycomb travels up and down inside side channels; the rail is both guide and closure. The edge gap is covered by the rail — the only line seen from outside is the cassette and rail.

The closure produces two performances: edge light leak falls to the lowest allowance, and the air current around the two nested cells is braked so the barrier turns unbroken. On the open-edged arrangement the cells are open to air exchange at the edge; in the cased they are not.

The rail profile seats to the joinery’s bead plane or inside the casing; permanent installation is made with screwed mounting.

## Standout Parts of the System

Side rail, top cassette and double-layer panel are the system’s identity.

- Side-Rail Channel The double-layer panel travels inside side rails; the edge gap is closed to light and air leaks.
- Sealed Double Pocket Enclosed rail + nested cells raise an unbroken barrier from edge to centre.
- Fabric Protection The enclosed rail protects the double-layer fabric from side creasing and impact.
- Steady Closing The panel slides on the plane; holds position without sagging or wobbling.
- Made to Measure The rail profile matches the joinery type.

## Who Is the Cased Duette For?

Spaces wanting darkening and heat break together.

It is the bedroom’s natural match: the enclosed rail covers the edge lines, the double cell raises two buffers on the glass plane — morning light does not appear as a line, winter-night glass chill does not enter.

In meeting and presentation rooms edge leakage in front of the projection disturbs; the cased system provides visual cleanliness.

On frequently opened windows rail protection shields the fabric from side impact; fabric life lengthens over the open-edged system. For the thin single-cell alternative the [cased honeycomb blind](https://www.fenetresystems.com/en/cased-honeycomb-blind/) is described on a separate page.

## Frequently Asked

Does the cased system cut edge light?

Yes — the side rail covers the edge gap; with the dark double layer leakage falls to the lowest level.

Can darkening and insulation go together?

That is the cased duette’s true strength: the enclosed rail covers the edges, two nested cells raise a double buffer on the glass plane — the two unite in one system.

Can it be removed and refitted?

The panel detaches from the rail; the cassette unscrews — not portable, but opens for maintenance.

Vertical or horizontal?

The cased arrangement works vertically; a separate cassette type is used on horizontal sliding systems.

## Send Window and Joinery Measurements

With net measurement and joinery type, a cased duette production and mounting plan is relayed.

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