What is important about fasteners when tiling exterior surfaces on a PEB?

• A. Use fasteners appropriate for exterior conditions to resist weather exposure.
• B. Fasteners should be decorative.
• C. Use interior-grade fasteners.
• D. Fasteners are optional in exterior tiling.

Answer: (A)

Exterior tiling requires fasteners that withstand weather exposure. When tiles are installed on the outside of a PEB, they face rain, humidity, salt or pollutants, UV light, and wide temperature changes, plus wind forces. Fasteners chosen for outdoor use must be rated for exterior conditions and resistant to corrosion, typically using stainless steel or hot-dip galvanized materials, and must be compatible with the substrate and waterproofing system. Interior-grade fasteners aren’t suitable because they can corrode, stain, or fail as conditions worsen, leading to loose tiles and other damage. Decorative fasteners don’t provide the necessary structural reliability or corrosion resistance for exterior environments. Fasteners aren’t optional here—the right exterior-rated hardware is essential to maintain the tile assembly’s integrity against weather, expansion, and wind loads, ensuring long-term performance of the exterior envelope on a PEB.