TY - RPRT
T1 - Development of Building Envelope Constructions
AU - Tommerup, Henrik Monefeldt
AU - Munch-Andersen, Jørgen
AU - Esbensen, Peter Kjær
PY - 2000
Y1 - 2000
N2 - It is expected that the heat insulation demands in the Danish
Building Regulations will be further increased around 2005, in
order to reduce the heating demand and the CO2-emission. A simple
increase of the insulation thickness of common wall types seems
not to be attractive due to the increased effect of the
2-dimensional heat loss, the large wall thickness, and the costs
of the wide foundation. Therefore, new types of walls have been
developed. It is sought to minimise the total heat loss as well as
the material consumption. The target was to come up with new walls
for which the construction costs only are increased by the cost of
the increased insulation. Further, the new walls should be based
on known materials to ensure that they can be used in 2005. Of
course, also the usual requirements to strength and durability
must be fulfilled. Detailed heat loss calculations showed that
design of the joint between the foundation, the wall, and the
floor slap is very important as 2-dimensional heat loss here is
quit significant if not taken proper care of (even though it is
not accounted for in the present rules). The new wall types were
consequently designed jointly with the foundation. Both walls from
solid materials as masonry and concrete and framed walls have been
dealt with. Three types of foundation and five types of wall have
been studied in detail, one of which is just the traditional
cavity wall with increased insulation. Cost analysis has proved
that the suggested wall types will be economical beneficial over
their lifetime, even at present energy costs. Presently, it is
sought to build real houses using the developed wall types.
AB - It is expected that the heat insulation demands in the Danish
Building Regulations will be further increased around 2005, in
order to reduce the heating demand and the CO2-emission. A simple
increase of the insulation thickness of common wall types seems
not to be attractive due to the increased effect of the
2-dimensional heat loss, the large wall thickness, and the costs
of the wide foundation. Therefore, new types of walls have been
developed. It is sought to minimise the total heat loss as well as
the material consumption. The target was to come up with new walls
for which the construction costs only are increased by the cost of
the increased insulation. Further, the new walls should be based
on known materials to ensure that they can be used in 2005. Of
course, also the usual requirements to strength and durability
must be fulfilled. Detailed heat loss calculations showed that
design of the joint between the foundation, the wall, and the
floor slap is very important as 2-dimensional heat loss here is
quit significant if not taken proper care of (even though it is
not accounted for in the present rules). The new wall types were
consequently designed jointly with the foundation. Both walls from
solid materials as masonry and concrete and framed walls have been
dealt with. Three types of foundation and five types of wall have
been studied in detail, one of which is just the traditional
cavity wall with increased insulation. Cost analysis has proved
that the suggested wall types will be economical beneficial over
their lifetime, even at present energy costs. Presently, it is
sought to build real houses using the developed wall types.
M3 - Rapport
BT - Development of Building Envelope Constructions
ER -