Passivhaus Germany Certified
AluClad Timber · Slim Line System
AluClad
Slim
A Passivhaus-certified window system with an exceptionally thin timber frame, concealed hinges, and flush aluminium profile on both faces. Engineered for architects who refuse to compromise.
1.0
Uw W/(m²·K)
Double glazed
66mm
Slim frame width
vs 90mm standard
+28%
Glazed area
More light, less frame
Key features
Concealed hinges only
Hidden hinges mounted inside the frame — flush exterior and interior with no visible hardware.
Passivhaus certified
PHI Germany Climate Zone 4 certified. Ideal for high-performance builds and 10-star NatHERS projects.
FSC timber core
Spruce timber core with outer aluminium shell. FSC certified — replanting for every tree used in production.
Flush both faces
Plane from outside and inside. Sharp aluminium edges create a minimalist, seamless integration into the facade.
Technical specification
System data sheet — AluClad Slim
Uw value1.0 W/(m²·K)
Frame width66 mm
Glazing unit thickness52 mm triple (4/20/4/20/4)
SpacerSWISSPACER Ultimate
Lift & Slide cross-section54 mm
HardwareSiegenia — concealed hinges only
ETA to site20–24 weeks
Why AluClad Slim
A genuinely rare thing — a slimline certified timber window that architects in Australia have been asking for, now here.
Thermal bridge-free design — aluminium outer shell fully decoupled from the timber frame, eliminating condensation risk.
Unlimited RAL finishes — aluminium clad exterior in any colour; timber interior in any stain or paint treatment.
Exceptional airtightness — years of dedicated engineering result in class-leading air permeability for passive house compliance.
Custom configurations — fixed, tilt & turn, parallel-opening, lift & slide — all available in the Slim profile.
AluClad system comparison
Metric
AluClad Standard
AluClad Slim ★
Uw W/(m²·K)
1.2
1.0
Frame width
90 mm
66 mm
Glazed area
Baseline
+28%
Hinges
Exposed
Concealed
PHI certified
—
Zone 4 ✓
Ready to specify AluClad Slim?
Talk to Monika about your project — ETA 20–24 weeks from order confirmation.