Question to the Department for Levelling Up, Housing & Communities:

To ask the Secretary of State for Levelling Up, Housing and Communities, whether he has made an assessment of the potential impact of hempcrete buildings on levels of indoor air pollution.

I am not aware of government research carried out to specifically measure the effects of hempcrete on indoor air pollution levels.

To comply with the Building Regulations, new buildings must meet minimum ventilation requirements. Statutory guidance for the Building Regulations ventilation requirements is given in Approved Document F. Approved Document F gives guidance on the maximum levels of indoor air pollutants in buildings. The regulations are technology neutral, and alternative approaches to meeting the requirement for adequate ventilation can be used so long as it can be demonstrated to the Building Control Body that the building meets all relevant parts of the regulations.