The invention relates to a sheet of vegetable wool fibre impregnated with a reactive mix made up of a partially or completely epoxidised vegetable oil and a hardener. The invention also relates to a panel including a sheet according to the invention. The invention further relates to a method for manufacturing a sheet or a panel according to the invention, comprising the following steps: mixing an epoxidised vegetable oil and a hardener at a temperature higher than each one of the melting temperatures thereof and lower than each one of the breakdown temperatures thereof; depositing the obtained mix on an assembly of vegetable wool fibres at a temperature higher than each one of the melting temperatures thereof and lower than each one of the breakdown temperatures thereof.
