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The video discusses the challenges and strategies involved in retrofitting buildings to meet passive house standards. It highlights the importance of window design in achieving energy efficiency and reducing operational carbon by 80%. The use of cork and lime-based plaster as insulation materials is also explored, emphasizing a fabric-first approach.

What is one of the main challenges when retrofitting buildings to meet passive house standards?

• Finding suitable locations for solar panels

• Reducing water usage

• Ensuring traditional sash windows allow enough daylight

• Installing energy-efficient lighting

What is the expected reduction in operational carbon when using a fabric-first approach?

• 50%

• 60%

• 70%

• 80%

Why was external insulation not possible in the discussed project?

• Building regulations

• Lack of suitable materials

• Because of existing workshops

• Due to budget constraints

What type of plaster is mentioned as being used in the project?

• Clay plaster

• Gypsum plaster

• Cement-based plaster

• Cork and lime-based plaster

What is a characteristic of the insulation material chosen for its hard finish?

• It is lightweight

• It is wood-based

• It is made of recycled materials

• It is transparent