For roofing professionals who demand the highest level of thermal stability and waterproofing, WIP 250HT from A1A Wholesale Supply delivers unsurpassed performance. This composite underlayment features a robust fiberglass-reinforced rubberized asphalt core laminated to an impermeable film layer.
Specifically formulated for high-heat environments, WIP 250HT is the ideal solution for installations under metal panels and mechanically fastened tiles, where surface temperatures can easily degrade standard underlayments. Its self-healing properties ensure that any penetrations from nails or screws remain watertight, maintaining the integrity of the roof deck even in the harshest climates.
Product Details
Manufacturer: Carlisle WIP Products
Composition: Fiberglass-reinforced rubberized asphalt with an impermeable film top layer.
Temperature Rating: Safe for service temperatures up to 250°F (121°C).
Exposure Rating: UV-stable for up to 180 days of exposure before primary roofing installation.
Compliance & Standards: * UL Classified & ICC-ES ESR #1556.
Florida Building Code Approved (#6785) & Miami-Dade County Product Control Approved.
Meets ASTM D1970 & ASTM E108/UL 790 Class A Fire Resistance.
2016 California Green Building Standards (Title 24) & ICC 700 National Green Building Standard.
Features & Benefits
Dual-Barrier Protection: Combines a reinforced asphalt core with a moisture-proof film to prevent water seepage from ice dams and driving rain.
Self-Sealing Technology: Automatically seals around roofing nails, staples, and screws to eliminate leak points at the fasteners.
High-Heat Stability: Withstands up to 250°F without adhesive degradation, bleeding, or drying out.
Fast Installation: Features a split-release film backing, allowing for quicker and more accurate placement on the roof deck.
Long-Term Durability: Resists rotting, cracking, and drying, ensuring a low lifecycle cost for the building owner.
Aesthetic Integrity: A concealed system that provides industrial-strength waterproofing without affecting the architectural look of the finished roof.
Applications
Metal Roofing Systems: The primary choice for standing seam or copper roofing where high heat transfer occurs.
Mechanically Fastened Tile: Provides a rugged secondary water barrier under clay or concrete tile.
Critical Areas: Ideal for use in valleys, ridges, hips, and around dormers or skylights.
Extreme Weather Zones: Recommended for regions prone to heavy snow loads, ice damming, or hurricane-force wind-driven rain.
Storage & Installation Notes
To ensure optimal performance, WIP 250HT rolls should be stored on end and covered in temperatures between 50°F and 100°F. For best adhesion, apply to a clean, dry substrate when temperatures are 50°F or higher. In cooler temperatures, priming or temporary mechanical fastening is recommended while the bond develops.
