Room in roof insulation involves the installation of insulation boards within the gaps between the rafters, which are the diagonal timbers forming the structure of the roof. Typically, this insulation process employs rigid insulation boards, providing effective thermal protection. Subsequently, a layer of plasterboard is applied over the insulation material, forming both the walls and ceiling of the room. Alternatively, some homeowners may opt for foam insulation, which is sprayed between the rafters. However, it's important to note that this method may not be suitable for all properties. Foam insulation, while effective in terms of thermal insulation, can impede proper air circulation around the timber framework. This restriction can potentially lead to issues such as condensation and dampness, making it a less recommended choice for some property types.