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LWT Passive House loft ladder.

Wooden loft ladder and hatch box Load rating of 160kg per tread Supplied with handrail as standard Thermally insulated. U value = 0.51 W/m2K Highly insulated and Passivhaus certified by PHI Class 4 certified airtight seal

LWT Passive House Loft Ladder

The LWT Passive House loft ladder…

…passivhaus certified wooden loft ladder

From £895 (excl. VAT)

Including delivery to any UK mainland address


Material: Wood
Operation: 3-part folding
Load capacity: 160 kg per step
U-value: 0.51 W/m2K
Max floor-to-ceiling height: 3.05 m

The LWT Passive House Loft Ladder has been designed for use in passive buildings. The folding wooden loft ladder is contained within, and attached to, an insulated wooden hatch box. Furthermore, three separate seals provide an an airtight seal when the trapdoor is closed.

The LWT Passive House is supplied with a kit to provide an insulated seal with the ceiling and minimise thermal bridges.


Key benefits at a glance

  • Certified Passivhaus loft ladder
  • Traditional wooden loft ladder design.
  • Load capacity of 160 kg per step.
  • High energy efficiency of 0.51 W/m2K.
  • Airtight seal when closed (Class 4).
  • Wide steps with anti-slip profile for comfort and safety.
  • Available in standard sizes only.
  • 3-part folding wooden loft ladder
  • Traditional loft ladder design
  • Load capacity of 160 kg per step
  • Supplied assembled in a hatch box with insulated trapdoor
    • Trapdoor supplied with a white finish to both sides
    • Standard hatch box height of 220 mm
    • Designed for quick and easy installation
  • High energy efficiency (U-value of 0.51 W/m2K, tested to EN ISO 12567-1)
    • Reducing loss of heat and lowering energy costs
  • Class 4 air permeability certified (tested to DIN EN 12207)
  • Available in standard hatch sizes for floor-to-ceiling heights between 2340 mm and 3050 mm
  • Wide steps / treads with anti-slip profile for comfort and safety
    • Step width of 340 mm (300 mm wide on 1000 mm x 550 mm model only)
    • Step depth of 80 mm
  • Supplied ready to install, including:
    • Passive House insulation kit
    • Handrail for safety
    • Protective feet
    • Operating rod
  • Can be ordered with a secondary upper hatch for applications requiring particularly high levels of thermal insulation. Please contact us for details.

The LWT Passive House 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) *

2340 – 2800

1220 x 720


2420 – 3050

1320 x 620


Other standard sizes might be available on special request. Please contact us to check the price and delivery lead-time.

  • Manufactured and tested to EN 14975
  • Supplied with a manufacturer’s 3-year warranty


LWT Passive House Loft Ladder – 3-part folding

Data Sheet

LWT Passive House Data Sheet – DS-LWT-PH