Florida Roofing Magazine - April 2022

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Considerations for Adhering Tile Roofs Using Adhesives Adrian Robledo, Director of Business Development, ICP There are different methods to adhere clay and concrete tile to rooftops as contractors know. Nail, screw, mortar and wire tie systems all provide advantages; however, adhesives can offer additional benefits to Florida-based roofers and remodelers along with various other concrete and clay tile markets. Chemical bonding solutions can provide superior water and wind resistance compared to mechanical fastening systems. Where driving rain and harsh winds threaten, roof tile adhesive can outperform other fastening systems in terms of performance, reliability and faster, easier application. When selecting and applying an adhesive, keep these considerations in mind for a great outcome for your next residential or commercial project.

sustained gale-force winds with gusts exceeding 100 miles per hour in extreme instances. Adhesives can offer additional wind uplift resistance compared to conventional mechanical fasteners. This extra holding power is provided by one- and two-component polyurethane formulations with optimized adhesive chemistries for bonding clay and concrete tile to common underlayments.

Adhesives Give Water Nowhere to Go

Adhesives Help Prevent Broken Tile

Mechanical fasteners like nails and screws create lasting penetrations into the waterproofing membrane or roof deck that can grow larger with time. Strong winds may induce tile “chattering” where individual tiles are lifted up and down as wind sweeps along the roof, much like a piano player performing a fast slide across the keys. This movement can enlarge mechanical fastener abrasions, giving water droplets a convenient place to divert. Tile adhesives negate this possibility by eliminating penetrations completely.

Adhesives Better Withstand Damaging Winds

As Floridians know, wind events can be routine and destructive at times. High wind regions like Florida – even parts of the Florida Panhandle – may experience

Many two-component polyurethane adhesives provide greater load-bearing characteristics for the tile. Here, the adhesive A and B chemicals combine to create a cushioned paddy under the tile, much like a pillow. This paddy can improve support strength by as much as 80 percent for individual tiles, making them less likely to break under stress or strain. Extra reinforcement also helps clay and concrete tile stand up to regular pressure washing and crews walking on the roof. Nails, screws and wire ties can also loosen or become dislodged, while two-component adhesives do not rely on a mechanical bond to resist shifting of the tile.

Know the Local Code

A two-component roof tile adhesive can provide the uplift resistance needed for high wind regions like Roofing adhesives are popular for their speed and simplicity, strong adhesion properties and sturdiness in high wind regions.

Nails and screws can puncture the roof deck or waterproofing membrane. Roof tile adhesives create no penetrations and provide added support underneath the tile to withstand walking, wear and weather. 30