Rolled attic insulation is the most common method used for attic insulation, primarily because it is the easiest method to use. There are then different types of rolls of wool fibres for specific insulation tasks, all having different densities, thermal conductivities and sizes. The density determines how it performs and how long it lasts, also indicating the quantity of material in the rolled attic insulation wool fibre. The thermal conductivity is the measurement used when calculating how well heat moves through the rolled attic insulation, or any other building material. We can buy the rolls in 4” (100mm) 6” ( 150mm) and 8” (200mm). It is important to match up the sizes of the timbers with our rolled attic insulation materials and then match them perfectly as this ensures any air and cold moving between the layers is stopped. It’s very hard to do this with layers of wool and timbers in between. There are mainly four different types of wool fibres being used at present for rolled attic insulation – they are glass wool, earth wool, rock wool and sheeps wool. When we use rolls of wool for rolled attic insulation of buildings we must ensure that we are able to stop air movement along the timbers and under the layers of wool in order to insulate successfully. If we do not ensure that this air movement is stopped then we will not experience comfort and we will continue to spend more on heating bills. The wool layer should be installed 12” (300mm) deep in order to achieve the building regulations Uvalue. The Uvalue is calculated by dividing the thermal conductivity by the thickness of the material. Contact us now to arrange a CONSULTATION so we can provide you with the best system, best advice and best price.