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Heavy duty aluminium Supreme DD loft ladder offers high thermal insulation for passivhaus / passive house projects

Concertina loft ladder with hatch box Load rating of 200kg per tread Overall Load rating. 500kg/m2 Supplied with handrail as standard Lightweight operation. Less than 3kg load. Available made-to-measure Thermally insulated. U value = 0.28W/m2K Highly insulated with secondary upper hatch. Ideal for passive house applications Class 4 certified airtight seal

Supreme DD Loft Ladder

The Supreme DD retractable aluminium loft ladder…

…superb energy efficiency

From £1,790 (excl. VAT)

Including delivery to any UK mainland address


Material: Pressure die-cast aluminium
Operation: Spring-assisted retractable ladder
Load capacity: 200 kg per step
U-value: 0.29 W/m2K
Max floor-to-ceiling height: 4.3 m

The Supreme DD is a very highly insulated version of the popular Supreme retractable aluminium loft ladder, achieving a U-value of just 0.29 W/m2K. The Supreme DD is supplied as a ready to fit unit, manufactured from high strength die-cast aluminium alloy components contained within, and attached to, a specially insulated hatch box with an upper cover that can be closed immediately after entering the loft, therefore preventing the flow of air. This not only helps to lock the warmth in the home or building, but also prevents moist air from flowing into the loft and condensing in the cold areas.

The Supreme DD’s heavy duty spring mechanism allows you to raise and lower the ladder with a minimum of effort (operating force of less than 3 kg). Large steps and pre-assembled telescopic handrail offer comfort, safety and ease of egress.


Key benefits at a glance

  • High strength, heavy duty.
  • Load capacity of 200 kg per step.
  • Ease of use, requiring operating forces of less than 3 kg.
  • Very high energy efficiency of 0.29 W/m2K
  • Suitable for high ceilings.
  • Large steps for comfort and safety.
  • Available in standard sizes or made-to-order with a wide range of options and accessories.
  • Spring-assisted retractable (concertina) loft ladder
    • Easy to operate, requiring less than 3 kg of force to open/close.
  • Retractable ladder manufactured from pressure die-cast aluminium
    • Lightweight
    • Strength
    • Stability
    • Durability
  • High strength, heavy duty loft ladder, with a load capacity of 200 kg per step
  • Supplied assembled in a hatch box with insulated trapdoor and upper cover
    • Trapdoor supplied with a white finish to both sides
    • Upper cover with one-hand, gas-spring assisted operation
    • Standard hatch box height of 630 mm, but can be specified for heights of up to 860 mm
    • Snap-lock closure mechanism on trapdoor, quarter-turn (handle-operated locking mechanism on upper cover
  • Very high thermal insulation (U-value of 0.29 W/m2K, calculated by the manufacturer according to DIN ISO 6946 by IFT Rosenheim)
    • Designed for use in energy-efficient buildings
  • Class 4 air permeability certified
  • Available in standard hatch sizes for floor-to-ceiling heights between 2200 mm and 2790 mm
  • Can be made-to-order to meet your exact dimensional requirements, for floor-to-ceiling heights of up to 4300 mm (contact us for details)
  • Large steps / treads for improved safety, comfort and ease of egress
    • Maximum stair width supplied to fit your floor-to-ceiling height and opening width
    • Step width ranges from 200 mm (for a 525 mm opening width) to 430 mm (for opening widths of 750 mm to 800 mm).
    • Step depth from 140 mm (for steps up to 380 mm wide) to 160 mm (for steps 430 mm wide)
  • Available with a low-noise electric motor for the ultimate in convenience. (Contact us for details)

The Supreme DD loft ladder is available in the following standard sizes that can be ordered on line.

Clear room height (mm) Opening length x width (mm) Case height (mm)
2200 – 2790 1200 x 700 630
2200 – 2790 1300 x 700 630
2200 – 2790 1400 x 700 630


Available made-to-measure…

The Supreme DD loft ladder can also be ordered made-to-measure for floor-to-ceiling heights from 2.2 m to 4.3 m, and opening sizes from 1100 mm long x 630 mm wide. Please download a ‘customer specification sheet’ (below) and contact us to discuss your requirements and to arrange a quotation.

CSS PLL Supreme

  • Manufactured to EN 14975 (certified by TÜV SÜD)
  • Supplied with a manufacturer’s 2-year full warranty and 10-year parts warranty


The following accessories are only available for order with a loft ladder.  Please make sure to add the required accessories to your cart before checkout, or contact us directly to discuss your requirements.


Supreme DD loft ladder with upper hatch – 7000201B