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Their drawbacks when compared to mineral wool are their substantially lower mold resistance, higher combustibility, and slightly higher thermal conductivity (hemp insulation: 0.040 Wm-1 k-1, mineral wool insulation: 0.030-0.045 Wm-1 k-1). [16]
The thickness of the wood wool layer in a composite board is at least 5 mm. Due to the higher insulation effect of the mineral or synthetic insulation layer, composite boards provide a higher level of thermal insulation relative to single wood wool boards.
This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.
Wool insulation commonly comes in rolls of batts or ropes with varied widths and thicknesses depending on the manufacturer. Generally, wool batts have thicknesses of 50 mm (2 in) to 100mm (4 in), with widths of 400 mm (16 in) and 600 mm (24 in), and lengths of 4000 mm (13 ft 4 in), 5000 mm (16 ft 8 in), 6000 mm (20 ft) and 7200 mm (24 ft).
Rock mineral wool 0.034 −0.042 List [50] Wallboard, see Wallboard. 1960s Values Dry Zero − Kapok between burlap or paper density 0.016 g cm −3, TC=0.035 W⋅m −1 K −1 Hair Felt − Felted cattle hair density 0.176 g cm −3, TC=0.037 W⋅m −1 K −1 density 0.208 g cm −3, TC=0.037 W⋅m −1 K −1 Balsam Wool − Chemically ...
Mineral wool insulation, 1600 dpi scan. Thermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with ...