hemp loose fill
Loose hemp fibers packed into wall or roof cavities as thermal insulation, generally from low-psychoactivity plant varieties.
Hemp loose fill is a thermal insulation material made from loose fibers of cannabis plants (Cannabis sativa), which are packed into cavities in walls and roofs. It is generally made from varieties of the plant which are extremely low in psychoactive chemicals, compared to the varieties of cannabis used as a drug. It is an environmentally sustainable material, but may require the addition of fire retardants and insect repellents.
The insulating fibers come from hemp varieties generally low in psychoactive compounds. The definition concerns a building material, not consumption of the plant.
The fibers are installed loose in the cavity. Additives can provide fire or pest resistance without turning the material into a rigid insulation panel.
Related definitions
-
cellulose loose fill
Particles or loose pieces of organic plant fiber used as thermal insulation. -
fiberglass loose fill
Glass fibers stuffed loosely into wall or roof cavities for thermal insulation. -
granulated cork
Granules of cork-oak bark used as loose thermal insulation in wall or roof spaces. -
mineral wool loose fill
Unbound mineral fibers used as loose thermal insulation, including rock wool and blast-furnace slag wool. -
perlite loose fill
Loose expanded perlite particles used as thermal insulation, made by heating naturally occurring volcanic glass. -
straw bales
Bales of straw from grasses such as wheat or rice used as thermal insulation within a building assembly. -
vermiculite loose fill
Loose expanded particles of vermiculite mineral used as thermal insulation in building spaces.