For cellulose fiber in the field of insulators we mean the flakes produced with recycled newspaper (which makes up about 80% of the flake) subsequently treated with boric salts to make them fireproof and not attackable by insects.
Normally it is the supplier who insufflates the cellulose fiber in the cavity of the wall with appropriate equipment. In green building, this material is also used to create prefabricated wooden composite walls that already contain insulation at the time of assembly on site.
There cellulose fiber it is the most recommended natural insulation by bioarchitects for ecological quality, performance and cost-effectiveness. The energy costs of production are very low (6 kWh per 1 cubic meter) The thermal insulation and (less) soundproofing effectiveness is based on the effect of air resistance, which spread evenly in tiny cells hinders the thermal excursion. The conductivity coefficient is λ: 0.032.
The insulating material in cellulose fiber which is on the market retains the hygroscopic characteristics of paper (great capacity to absorb water molecules present in the surrounding environment) but does not lose the ability to isolate in the presence of a modest level of humidity, does not emit harmful substances, is unassailable from insects (if treated with boron salts) and fire resistant (Class 1), it is electrically neutral.
The flakes in cellulose fiber they are an optimal solution for easily and economically intervening on existing buildings with insufficiently insulated cavity walls, perhaps because they lack insulation or contain old disintegrated polystyrene-based insulation. When blowing, care must be taken not to leave empty spaces, which is quite common especially at the top of the joint between wall and ceiling, which could create thermal bridges.
There cellulose fiber it is an ecological material and has no environmental contraindications if produced and applied correctly. Since it releases dust, operators must protect themselves with gloves and masks during application. It is afraid of water and should be kept dry.