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An apparatus for applying an improved adhesive to a series of sheets of insulation having drainage channels, wherein the apparatus includes a frame with a power-driven conveyor, a magazine for receiving sheets in stacked relation, and an elongated adhesive dispensing hopper adapted to apply an adhes

An apparatus for applying an improved adhesive to a series of sheets of insulation having drainage channels, wherein the apparatus includes a frame with a power-driven conveyor, a magazine for receiving sheets in stacked relation, and an elongated adhesive dispensing hopper adapted to apply an adhesive mixture having spacer beads or particles mixed therein on the top surface of each sheet of insulation adjacent to the drainage channels and including a shutter mechanism for forming transversely extending substantially adhesive-free pathways between the drainage channels and a screed attached to the hopper having optional scraper blades which wipe away any adhesive that may flow in the drainage channels.

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1. A method of applying sheets of insulation to a substantially vertically arranged building substrate which comprises the steps of applying substantially parallel-spaced apart adhesive beads onto one side of an insulation sheet such that channels are defined between said beads, and wherein the adhe

1. A method of applying sheets of insulation to a substantially vertically arranged building substrate which comprises the steps of applying substantially parallel-spaced apart adhesive beads onto one side of an insulation sheet such that channels are defined between said beads, and wherein the adhesive beads include means for spacing the sheet from the substrate once the sheet is applied thereto, and mounting the sheet onto the building substrate such that the beads extend substantially vertically to form channels open to the flow of air and/or moisture between the substrate and the sheet. 2. The method of claim 1, wherein the spacing means in the adhesive includes a plurality of solid particles. 3. The method of claim 2, wherein the particles are polyurethane. 4. The method of claim 2, wherein the particles are polyurethane beads. 5. A method of applying sheets of insulation having transversely spaced apart drainage channels on one side to building substrates, said method comprising the step of applying beads of adhesive to the side of the insulation sheets having the drainage channels and between the channels, and wherein the adhesive beads includes means for spacing the insulation sheet from the building substrate once the sheet is applied thereto, and mounting the sheet onto the building substrate such that the beads and channels extend substantially vertical and form open channels between the insulation sheets and the building substrate, wherein the spacing means in the adhesive beads prevent the adhesive from flowing into the open channels thereby assuring the open channels are capable of allowing the flow of air and/or moisture between the substrate and the sheet. 6. The method of claim 5, wherein the spacing means in the adhesive includes a plurality of solid particles. 7. The method of claim 6, wherein the particles are polyurethane. 8. The method of claim 6, wherein the particles are polyurethane beads.