You need to clarify with the local building authority whether rebuilding after demolition is possible with the same dimensions, or if the loss of existing use rights will lead to building and planning regulation complications. For this project, you will need an architect (for the building permit application, possibly a preliminary planning inquiry) and a structural engineer, and possibly a surveyor. Demolition above a certain size (in NRW 300 cubic meters (m3) gross volume) must be approved through a demolition permit and carried out by certified demolition companies with proof of disposal. Depending on the age of the building, the bungalow from the unfortunate era of prefab houses of the 1960s/70s may be classified as hazardous waste.
Your fundamental considerations regarding material choice are contradictory: bricks with high bulk density have low thermal insulation values but provide good soundproofing. The thermal storage capacity of a building material plays a minor role in our climate zone and is unrelated to the thermal insulation value or thermal conductivity of the material.
So you have the choice between an exterior wall construction with high bulk density (brick / sand-lime brick) plus additional external thermal insulation composite system (ETICS) or a monolithic lightweight concrete wall (aerated concrete / perforated brick) at least 36.5cm (14.4 inches), preferably 42cm (16.5 inches) or 49cm (19.3 inches) without ETICS, which provides poorer sound insulation. Depending on the location of the plot and external noise exposure, this construction may possibly be insufficient.
Furthermore, the energy saving regulations apply, which define the energy standard (final energy consumption / transmission heat losses / primary energy demand) of a new building. This affects the choice of heating system, which must be coordinated with the shell of the building as a thermally insulated envelope.
Building has become more complicated and more expensive.
Your fundamental considerations regarding material choice are contradictory: bricks with high bulk density have low thermal insulation values but provide good soundproofing. The thermal storage capacity of a building material plays a minor role in our climate zone and is unrelated to the thermal insulation value or thermal conductivity of the material.
So you have the choice between an exterior wall construction with high bulk density (brick / sand-lime brick) plus additional external thermal insulation composite system (ETICS) or a monolithic lightweight concrete wall (aerated concrete / perforated brick) at least 36.5cm (14.4 inches), preferably 42cm (16.5 inches) or 49cm (19.3 inches) without ETICS, which provides poorer sound insulation. Depending on the location of the plot and external noise exposure, this construction may possibly be insufficient.
Furthermore, the energy saving regulations apply, which define the energy standard (final energy consumption / transmission heat losses / primary energy demand) of a new building. This affects the choice of heating system, which must be coordinated with the shell of the building as a thermally insulated envelope.
Building has become more complicated and more expensive.
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