Spray on barrier systems and methods of making same

A method for providing an air or watertight membrane on a surface comprising:

• supplying a pressurized carrier fluid to an applicator gun;
• supplying a plurality of reinforcing fibers to the applicator gun;
• combining the plurality of reinforcing fibers and the pressurized carrier fluid at a predetermined ratio;
• spraying the combined plurality of reinforcing fibers and the pressurized carrier fluid onto the surface to form a unitary membrane;
• wherein the unitary membrane is airtight, watertight, or both.

A method for providing a roofing system comprising:

• affixing a plurality of panels comprising an insulating material to a structural base;
• affixing a base ply layer to the plurality of panels to provide a substantially rigid surface;
• applying a first sprayable composite membrane to the base ply layer to form a unitary membrane that is waterproof, airtight, or both;
• wherein the unitary membrane comprises:
• a fiber reinforcing component;
• and
• a liquid elastomer component;
• and
• wherein the fiber reinforcing component and the liquid elastomer component are combined during application.