Freezer — external wall base, Variant I

Junction function

Freezer base at the external wall = the most demanding detail in a freezer facility. A temperature gradient of 50°C (freezer −25°C, ground +10°C) requires a complete termPIR system beneath the floor.

Vs. standard bases (adjacent p. 33):

• Variant I = full sub-floor termPIR layout — critical for:
  • Preventing ground freezing (after years of operation, a freezer without sub-floor insulation may form a “frost lens” beneath the floor).
  • Floor stability — the temperature gradient stresses the concrete.

Critical installation aspects

• termPIR under the floor, thickness 150–200 mm (for a −25°C/+10°C ground freezer ΔT=35°C → 150 mm; for −40°C ΔT=50°C → 200 mm).
• Vapour barrier (item 07) beneath the termPIR on the ground side — SBS bituminous felt or 0.3 mm PE foil.
• PUR foam + plastic sealing compound seal the panel/floor joint.
• PVC concrete base profile protects against impact from equipment.
• Cement levelling layer between termPIR and the concrete floor — prevents point loading of the PIR.

Documentation

GS insPIRe® CH Cold Storage Catalogue (Gór-Stal 2025), page 30 — Freezer room, external wall base, variant I. Scale 1:5.

Components in this junction