Fire resistant glazing assembly

The assembly has hollow-chamber profiles 14a and glazing retaining means 32 forming a window or door frame, the profiles each including at least one sub-chamber 20 and a reinforcement component 26, the sub chambers and reinforcement component extending along the length of each profile. The profile is made of a heat meltable material such as plastic or aluminum. The reinforcement component and the glazing retaining means may be galvanized steel, and be connected by screw, bolts or pins 34. The sub chambers may be filled with a fire resistant or fire cooling material 20a. The assembly forms a fire resistant barrier, which is at least 15% by weight of the profiles total weight. The fire resistant or cooling material may be wood, gypsum, aerated material or intumescent material. Also claimed is a method of manufacture and a kit of parts.