Bim.com Import 2026-06-24 10:48:19 Properties Thermal resistance (R-value) v1.0
Property

Thermal resistance (R-value)
v1.0

Active

URL: https://opendictionary-ecstest.test-bim.com/organization/25869347-9422-4528-ac1c-65954fa4061d/dictionary/83b40007-fcbf-4120-9133-34ad346b1a12/property/f4689c1e-2ac8-4d0e-91de-dc33710564e3

GUID: ddd5b091-7102-42e3-8d70-335c8a391079

Definition

The calculated mathematical measure of a specific material thickness's absolute ability to retard the continuous flow of conductive heat energy.

Description

The paramount specification used by builders to guarantee compliance with municipal energy codes and minimize long-term facility heating costs.

Example

R5

Technical definition

Data type

String

Value list

  • R1
  • R2
  • R3

Usage

Property groups (1)

References

Reference documents (7)

  • ASTM C518 Steady-State Thermal Transmission Heat Flow Meter Method v1.0
  • EN 12667 Thermal transmittance (U-value) Thick Products v1.0
  • EN 13501-1 Reaction to fire classification of Construction Products v1.0
  • EN 13501-2 Fire Resistance of Building Elements v1.0
  • EN ISO 10077-1 Thermal Performance Part 1 v1.0
  • EN ISO 10292 Thermal Performance Calculation of U value v1.0
  • EN ISO 6946 Building Components Thermal transmittance (U-value) v1.0

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