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Tall fixed aluminium window with a slim dark frame beside a narrow opening sash in a bright Dubai living room
  • WINDOW SYSTEM
  • DECEUNINCK

Deceuninck Decalu88 Flush Casement

Decalu88 Flush Casement is Deceuninck's aluminium casement window with the sash flush with the frame inside and out, so the closed window reads as one flat panel. Locking and drainage are concealed and the thermal break is patented. In the UAE it suits villas and townhouses where the look is deliberately clean; sashes go up to 180 kg and glazing units from 12 to 52 mm.

  • 88 mm System depth
  • 12–52 mm Glazing unit thickness
  • 1.2 W/m²K U-value, double glazing
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Technical data

88 mm aluminium casement window with the sash flush to the frame inside and out, concealed locking and drainage, and a patented thermal break.

Values are the manufacturer's published figures for the series; the actual value depends on the configuration — glass, size and hardware. Which series fits your opening is settled at the free survey.

Manufacturer data
System type
Window system
Material
aluminium
Opening
flush casement
System depth
88 mm
Glazing unit thickness
12–52 mm
U-value
from 0.8 W/m²K (triple-glazed)
U-value, double glazing
1.2 W/m²K
Sash weight
up to 180 kg

A flush casement removes the step between sash and frame that ordinary windows show, and this one does it on an 88 mm aluminium section. We fabricate Deceuninck profiles to the manufacturer's specification at our Dubai factory and install them ourselves.

Where a flush sash earns its place

Contemporary villas where the window is part of the architecture: a run of tall, narrow casements along a stair, a bedroom elevation over the garden, a study where the frame should disappear into a plastered reveal. With nothing standing proud of the frame, the window keeps a clean line from the street and from the room. The glazing range of 12 to 52 mm leaves room for a thick laminated or acoustic unit, and a sash weight of up to 180 kg lets a tall, heavy pane stay in one piece.

Heat, sand and salt air

Deceuninck publishes a U-value from 0.8 W/m²K with triple glazing and 1.2 W/m²K with double, without saying whether it is a window or a frame figure, so treat it as a headline rather than a result for your opening. In a Dubai summer the useful reading is simple: the lower the number, the less outside heat the window passes to the air conditioning.

Concealed drainage and locking matter here as well. There are no slots on the face to collect sand after a dusty day, and the locking sits inside the section instead of on it. Near the sea the finish is still chosen for the distance from the water — a flush profile does not change what salt air does to a coating.

Flush Casement or Standard

Decalu88 Standard has the same 88 mm depth and a flat exterior, adds a tilt-and-turn version, and is published at a U-value from 1.1 W/m²K double-glazed and from 0.86 triple-glazed. Flush Casement is casement only, but its sash is flush on both faces, not just outside. If the room needs a tilted sash for night air, choose Standard; if the elevation is the point, choose Flush Casement.

Decalu88 Flush Casement is the Decalu window to pick when the frame should disappear into the wall and a side-hung sash is all the opening needs.

Other Deceuninck systems

Other series from the same range — compare the figures before the survey.

  • Window · casement · tilt-and-turn

    Deceuninck Decalu88 Standard

    88 mm thermally efficient aluminium window with a completely flat exterior; Decalu windows are offered in casement and tilt-and-turn versions.

    System depth
    88 mm
    U-value
    from 0.86 triple-glazed / 1.1 double-glazed W/m²K
    Watertightness
    E1650
    Wind resistance
    Class C5 (NBN 12210)
    Acoustic value
    Rw 47 (-1;-2) dB
  • Window · pivot

    Deceuninck Decalu101 Scand

    101 mm pivot window that rotates 160° for cleaning and maintenance, aimed at high-rise openings and places where access is difficult.

    System depth
    101 mm
    Pivot rotation
    160 °
    U-value
    from 0.89 triple-glazed / 1.31 double-glazed W/m²K
    Watertightness
    E1800 (NBN EN 12208)
    Air permeability
    Class 4 (NBN EN 12207)
  • Window · uPVC · inward-opening door · outward-opening door

    Deceuninck Legend

    80 mm six-chamber uPVC window and door system with three gaskets including a centre seal, from Deceuninck's Turkish subsidiary.

    Frame width
    80 mm
    Chambers
    6
    Gaskets
    3 (with centre gasket)
    Glazing thickness
    24, 30, 36, 44, 52 mm
    Uf
    0.92 W/m²K
Modern villa with panoramic aluminium glazing and a pool at sunset

Get a price for this system

Send the opening sizes or a photo — we reply in WhatsApp within 15 minutes, and an engineer measures on site within 48 hours, free.

The honest downside

When the flush casement is the wrong call

It opens one way only. There is no tilt position, so a room that depends on a little fresh air overnight gets either a wide-open sash or nothing. A flush sash is also less forgiving on site: if the reveal is out of square, the error shows along the whole joint because there is no overlap to hide it, so the opening has to be put right before the frame goes in.

If ventilation by tilting matters more than a perfectly flat face, take Decalu88 Standard — the same depth and line, with a tilt-and-turn sash. And if the opening is really a door onto the terrace, no casement is the right family; a sliding door belongs there.

Consider instead Deceuninck Decalu88 Standard

Frequently asked questions

The sealing works the same way: gaskets are pressed between sash and frame when the handle closes. The flush line is about how the faces align, not about giving up seals. What decides the result on site is adjustment — we set each sash for even compression after installation, which on a flush window is also what keeps the joint visually straight.

Glazing units from 12 to 52 mm thick. That runs from a slim unit for a shaded side window to a thick insulated unit with an acoustic laminate for a bedroom facing a road. The sash limit of up to 180 kg is checked against the chosen build-up before production, so a tall pane never ends up heavier than the hinges are meant to carry.

Start with the free survey. An engineer is on site within 48 hours, checks the reveals — flush sashes need square openings — and measures every window. Send photos on WhatsApp and we reply within 15 minutes; the priced quote follows the survey.

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We are always happy to welcome you at our showroom

Main Office

Dubai — Showroom

The Pinnacle Building, Sheikh Zayed Road, Office 607

Mon–Fri: 9:00 – 18:00

+971 50 220 6913

Showroom

Samples to see in person

Profiles, glass units and hardware to see and touch before you choose.

Dubai — Showroom The Pinnacle Building, Sheikh Zayed Road, Office 607
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