Thermal
Bridges

Cracow University of Technology

Faculty of Civil Engineering

Institute of Building Materials and Structures, L-17

_____________________________________________

International mobility workshop for Slovak students

on

Low Energy Building Design

prepared by

Tomasz Kisilewicz, Dr Eng.

Katarzyna Nowak, M.Sc.

U-value including
thermal bridges
influence:

A

A

L

U

U

j

j

i

i

i

k

 





 





where:

Ψ – [psi] linear heat transmission coefficient
[W/mK]

Χ – [chi] spot heat transmission coefficient
[W/K]

-PN-

EN

ISO 10211-1:2005

Mostki cieplne w budynkach -

Strumień cieplny i temperatura powierzchni - Ogólne metody

obliczania

-PN-

EN

ISO 10211-2:2002

Mostki cieplne w budynkach -

Strumień cieplny i temperatura powierzchni - Liniowe mostki

cieplne

-

-PN-

EN

ISO 14683:2001

Mostki cieplne w budynkach -

Liniowy współczynnik przenikania ciepła - Metody

uproszczone i wartości orientacyjne

Thermal Bridges
in

European
Standards

D.2.3 Thermal bridges

Requirements can be expressed in terms of a
maximum linear thermal transmittance for
junction between building components. Values of
linear thermal transmittance can be obtained by
any of the methods set out in EN ISO 14683:2005

The requirement cen be set at different levels for
different types of junction (wall/floor, window
jamb, etc.)

Company: Halfen –
Deha, element HIT

Balcony
reinforcement with
thermal break

Company: Halfen –
Deha, element HIT

Company: Halfen –
Deha, element HIT

Company: Halfen –
Deha, element HIT

Program THERM

http://windows.lbl.gov/sof

tware