7. Conclusions
A prefabricated retrofit module was developed and optimised
having in mind the Portuguese building stock and their retrofit
needs, considering the use of solutions with cost-effective insulation
thicknesses, within the frame of the international project
IEA ECBCS Annex 50 and the national Project – FCOMP-01-0124-
FEDER-007189. The developed PRM solution has a measured
overall thermal resistance of 4.35 m2 K/W and a U-value of
0.23W/(m2 K). It presents a small thermal bridge in the docking
area section, between modules, and no significant thermal bridges
1.5 Steel U-profile Steel U-profile Steel U-profile Steel U-profile
120 Extruded polystyrene insulation Rock wool insulation Polyurethane panel insulation Expanded polystyrene insulation
1 Vapour retardant Vapour retardant Vapour retardant Vapour retardant
U-value
(W/(m2 K))
0.23 0.23 0