Fire-stopping
Every service penetration through a fire-rated wall or floor needs fire-stopping to the correct rating. Photograph each before closing up.
Fire doors
Frame, leaf, ironmongery and seals all matter. Self-closers stay on. Glazing is rated. Smoke seals intact.
Compartmentation
Where compartments are required, they must be continuous. A breach in the loft above a fire-rated wall undoes the protection on the floor below.