Roofing
insulation is used in buildings, and refers to the application of thermal
insulated materials, which are applied using various methods, into a roof space,
to prevent heat loss. Roofing insulation is an important factor to achieving
thermal comfort for the buildings occupants, and roofing insulation reduces
unwanted heat loss, and reduces the energy requirements of cooling and heating
systems. Roofing insulation does not particularly address ventilation or sound
proofing issues. Roofing insulation simply refers to the insulating materials
being used to slow heat loss. Materials commonly employed in roofing insulation
are, cellulose, rock wool, vermiculite, polystyrene, fibreglass and urethane
foam. The effectiveness of roof insulation is usually evaluated by its R-value,
but this does not take into account construction or local environment factors.
Roofing insulation is normally easy to apply, as most types of roofing
insulation are simply laid down.