Details of the changes to Approved Document Part B (Fire Safety) volume 1 and 2, and Approved Document 7 (Workmanship and Materials).
Manylion newidiadau i Ddogfen Gymeradwy rhan B (Diogelwch Tân) cyfrolau 1 a 2, a Dogfen Gymeradwy 7 (Deunyddiau a Chrefftwaith).