The guidance in Approved Document B has been updated in Wales since 2017 to improve fire safety standards, including changes made this year (2025).
Mae’r canllawiau yn Nogfen Gymeradwy B wedi cael eu diweddaru sawl gwaith ers 2017 i wella safonau diogelwch tân, gan gynnwys newidiadau a wnaed eleni (2025).