An apparatus for dispensing bead insulation into cavity walls for providing insulation between two skins of said walls, said apparatus comprising: - a dispensing head arranged for dispensing bounded bead insulation, comprising dry bead insulation and adhesive fluid, into said cavity walls; - a bead container connected to said dispensing head via a bead supply pipe, and arranged for storing said dry bead insulation; - bead transportation means arranged for transporting said dry bead insulation from said bead container to said dispensing head via said bead supply pipe; - an adhesive container connected to said dispensing head via an adhesive supply pipe, and arranged for storing said adhesive fluid; - adhesive fluid transportation means arranged for transporting said adhesive fluid to said dispensing head via said adhesive supply pipe, the apparatus being characterized in that it further comprises: - a dry bead flow meter arranged for determining a measure for a flow rate of said transported dry bead insulation, wherein said dry bead flow meter is arranged for determining said measure for said flow rate of said transported dry bead insulation by measuring an under pressure in any of said dispensing head or said bead supply pipe; - an adhesive fluid flow meter arranged for determining a measure for a flow rate of said transported adhesive fluid; - a control unit in electronic communication with said dry bead flow meter and said adhesive fluid flow meter, and arranged for determining and providing a ratio of transported dry bead insulation to transported adhesive fluid based on said determined measures, and wherein: - said control unit comprises ratio settings for indicating a desired ratio of transported dry bead insulation to transported adhesive fluid, and - said control unit is further arranged for controlling at least one of said adhesive fluid transportation means and said bead transportation means based on said determined ratio and said desired ratio of transported dry bead insulation to transported adhesive fluid. - a dispensing head arranged for dispensing bounded bead insulation, comprising dry bead insulation and adhesive fluid, into said cavity walls; - a bead container connected to said dispensing head via a bead supply pipe, and arranged for storing said dry bead insulation; - bead transportation means arranged for transporting said dry bead insulation from said bead container to said dispensing head via said bead supply pipe; - an adhesive container connected to said dispensing head via an adhesive supply pipe, and arranged for storing said adhesive fluid; - adhesive fluid transportation means arranged for transporting said adhesive fluid to said dispensing head via said adhesive supply pipe, - a dry bead flow meter arranged for determining a measure for a flow rate of said transported dry bead insulation, wherein said dry bead flow meter is arranged for determining said measure for said flow rate of said transported dry bead insulation by measuring an under pressure in any of said dispensing head or said bead supply pipe; - an adhesive fluid flow meter arranged for determining a measure for a flow rate of said transported adhesive fluid; - a control unit in electronic communication with said dry bead flow meter and said adhesive fluid flow meter, and arranged for determining and providing a ratio of transported dry bead insulation to transported adhesive fluid based on said determined measures, and wherein: - said control unit comprises ratio settings for indicating a desired ratio of transported dry bead insulation to transported adhesive fluid, and - said control unit is further arranged for controlling at least one of said adhesive fluid transportation means and said bead transportation means based on said determined ratio and said desired ratio of transported dry bead insulation to transported adhesive fluid. - said control unit comprises ratio settings for indicating a desired ratio of transported dry bead insulation to transported adhesive fluid, and - said control unit is further arranged for controlling at least one of said adhesive fluid transportation means and said bead transportation means based on said determined ratio and said desired ratio of transported dry bead insulation to transported adhesive fluid.