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Façade envelope wall

D.02 Façade envelope wall SCALE 1:10
1 — 140 5 5 6 50 7 — 2 3 228 mm

Dashed layers sit inside the stud cavity, not in addition to it. Keyboard navigable with the arrow keys; the same data is published as a table in the layer schedule below.

Layer schedule

D.02 · layer schedule · total 228 mm
Layer Material Thickness λ Function
1 Pladur plasterboard lining Gypsum board — — Internal finish Thickness not stated in the source document — layer data pending sign-off (open item 4).
2 INSULTERM 600 in stud cavity Sprayed thermal-acoustic conglomerate 90 mm 0.138 W/m·K Cavity insulation with mass, warm side
3 Mineral wool in stud cavity Rock wool 50 mm — Cavity insulation, cold side — where the temperature gradient is steepest
4 C140 steel stud cavity Cold-formed galvanised steel 140 mm — Structure — the cavity contains layers 2 and 3
5 Placner ribbed sheet Cold-rolled galvanised steel, Z200, 0.3 mm base sheet 5 mm — In-plane racking bracing · mechanical key for the sprayed layer 5 mm is the overall profiled depth including rib height, not the sheet gauge.
6 INSULTERM 600, sprayed Sprayed thermal-acoustic conglomerate 50 mm 0.138 W/m·K Continuous external thermal break — the studs never reach the outside face
7 Monocapa render Single-coat mineral render — — External finish Thickness not stated in the source document — layer data pending sign-off (open item 4).
Total 228 mm

An em dash means the source document does not state that value; it is not a zero. Cavity-contained layers are indented — they sit inside the stud depth, so the column does not sum to the total.

Performance

D.02 · performance
Property Value Basis
U-value, 1D uncorrected 0.359 W/m²K EN ISO 6946, one-dimensional steady state, before bridging correction.
U-value, bridging corrected 0.43 W/m²K EN ISO 6946, one-dimensional steady state, with a +20% bridging correction applied as an engineering estimate.
Self-weight 119 kg/m² Mass estimate from the layers and dimensions in the source document.
Traditional equivalent 264 kg/m² Derived from the published self-weight and reduction percentage.
Weight reduction 55 % Self-weight against the traditional equivalent build-up.
Fire resistance (EI) Test programme in progress — contact technical department Awaiting laboratory test report
Airborne sound reduction (R_A) Test programme in progress — contact technical department Awaiting laboratory test report
Structural span Test programme in progress — contact technical department Awaiting laboratory test report
Racking capacity Test programme in progress — contact technical department Awaiting laboratory test report
Watertightness Test programme in progress — contact technical department Awaiting laboratory test report

U-values are one-dimensional steady-state calculations to EN ISO 6946. Bridging correction is applied as an engineering estimate: +20% for walls, +15% for horizontal elements. 2D numerical analysis to EN ISO 10211 is in progress; values will be updated on completion.

Not yet stated

  • EIFire resistance · in test
  • R_AAirborne sound reduction · in test
  • spanStructural span · in test
  • watertightnessWatertightness · in test

Test programme in progress — contact technical department

The façade build-up, and the detail the rest of the system is judged by. Seven layers run from the Pladur lining to the monocapa render across a total of 228 mm. What makes it different from conventional light steel framing is layer 6: 50 mm of INSULTERM 600 sprayed on the outside face of the Placner sheet, continuous across the whole façade. In conventional framing the studs bridge the full wall thickness and a cold line runs through the envelope. Here the studs stop at the Placner sheet and never reach the outside face.