January 19, 20242 yr comment_40737 We have an attached annex converted 10 years ago which is now let out as a single let. It's ground floor, but part of our habitable accomodation is above, with standard plasterboard ceilings. Can we base on recommendations here having a grade D and ld2 be acceptable? Many thanks housing – fire safety | cieh https://www.cieh.org/media/1244/guidance-on-fire-safety-provisions-for-certain-types-of-existing-housing.pdf P47 Fire separation (see paragraph 19) 30 minutes fire resistance between flats throughout is the ideal, but on risk assessment there may be no requirement for additional fire-resisting separation between units providing walls and floors are of sound, traditional construction and additional compensatory detection is fitted. Report
January 22, 20242 yr comment_40788 Possibly. Depending on the conversion work & materials used you may have 30 mins FR already. Report
January 24, 20242 yr comment_40824 Just out of interest, would 12.5mm plasterboard (standard) and 3mm skim achieve 30mins? If not, is it worth considering intumescent paints? Lastly each room only has one pendant fitting, so this seems to be much less of a fire risk compared to if all were non fire rated downlighters. Not sure if light fitting should be considered in the assessment. Many thanks again! Report
January 29, 20242 yr comment_40925 Rough guide for existing premises from current guidance: Notional 30 minutes fire resistance – typically timber floors with lath and plaster ceilings. Full 30 minutes fire resistance – typically timber floors with plasterboard ceilings Guidance for uprating timber floors accepted a 12.5mm plasterboard (or 6mm of certain calcium silicate board such as Promat Masterboard) with a plaster skim to the underside of the joists, although different types of board products require different thicknesses and need checking with a manufacturer Report
January 30, 20242 yr comment_40948 HI Again, Many thanks for your reply. Just so im not misinterpreting. Full 30 minutes fire resistance – typically timber floors with plasterboard ceilings This refers to existing ceiling being 30min fire resisting with a standard 12.5mm plasterboard (not fireline or other). Many thanks Report
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