Fire regs PB thickness for ground floor ceiling.

[Dominique]

Hi

We are doing our ground floor kitchen in our 1900 terraced house. We have knocked out chimney breats through to the brick lean to room behind existing kitchen. What is the thickness of plasterboard required by building regs we need to use on the ceiling between the existing kitchen and bathroom on first floor above?

Thanks
Dominique

 

[freddiemercurystwin]

1 layer or 12.5 + skim should be fine.