Thermal Bridges In Masonry Constructions

Summary

CO2 emissions from private dwellings are mainly due to heating of the buildings.  There is great potential for saving energy and reducing CO2 emissions by reducing heat loss through masonry walls.  The German brick industry has developed new vertically perforated bricks with low thermal conductivity.  With improved thermal insulation of external walls, the influence of thermal bridges increases.  Special buildings were constructed using single leaf masonry consisting of vertically perforated bricks with low conductivity.  Typical links to other components were developed to reduce thermal bridges, e.g., at ceilings or at  windows.  Calculations of energy use of buildings, as well as thermal bridges, are made.  Values of linear thermal transmittance of thermal bridges at different connections are derived using given values of masonry thickness and thermal conductivity.  It was shown that, with optimised brickwork construction, thermal bridges can be effectively reduced in most locations.  5 refs.

Primary author(s): Metzemacher H

                           

Source: 12th Int.Brick/Block Masonry Conf. Proc. Vol.2

            Madrid,25-28 June 2000,p.1259-1267

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