Meeting the requirements for uplift resistance is more complex for tile than most other systems. There are many reasons for this, but among those are the need to resist both uplift pressures for underlayment, as well as for hip and ridge or trim tile in pounds per square foot while meeting the aerodynamic uplift moment resistance required for the tile itself. This is further complicated as many of the components are manufactured by different companies. In many cases, the tile is adhered with foam adhesive or, in rare instances, with mortar to the underlayment which must be adhered or fastened to the roof deck to complete the roof system load path.
Many of the prescriptive methods previously used to adhere tile were based on information obtained for what is commonly referred to as a 30/90 hot mop. Much of this information was adopted and transferred when self-adhering membranes came on the scene. But as self-adhering membranes’ popularity grew, it became obvious that the adhesives performed differently than hot asphalt. Read More.