What must mastic be reinforced with for effective insulation?

Mastic must be reinforced with glassfab or reinforcing fabric to enhance its physical properties and effectiveness as an insulator. This combination provides additional strength and durability, which is essential for maintaining the integrity of the insulation system over time, especially in variable environmental conditions. The reinforcement helps prevent cracking and ensures that the mastic adheres properly to insulation materials, thereby optimizing thermal performance and resistance to moisture ingress.

Other materials like plastic mesh, foil tape, or plywood do not provide the specific reinforcement needed for mastic in insulation applications, as they do not address the same structural reinforcement and thermal performance requirements that glassfab or reinforcing fabric do.