Titanium PSD Synthetic Roof Underlayment: High-Temp UV-Resistant Specs for Metal & Tile Roofs
Published: 2026-06-22
Titanium PSD (Pitched Synthetic Deck) is InterWrap's premium synthetic underlayment designed for sloped metal, tile, and shingle roofing applications. The 180-day UV exposure rating is the key specification — it means the underlayment can be left exposed to sun during phased installation without degradation. This is critical for large commercial projects where underlayment may be exposed for weeks between installation and roof covering. The polypropylene construction provides 2x the tear strength of #30 felt at a fraction of the weight. Anti-slip coating on both sides improves worker safety — synthetic underlayments are notoriously slippery when wet; the PSD series specifically addresses this.
🛡️ Insurance & Compliance AdvisorySynthetic underlayment has largely replaced #30 felt in modern roofing specifications because of superior tear resistance, UV stability, and slip resistance. For insurance claims: document which underlayment was used. Claims for metal roof leaks often hinge on underlayment condition — a synthetic underlayment at 2 years old should be fully intact, while #30 felt may already be deteriorating in high-heat climates. For tile roofs: the underlayment IS the waterproofing layer (tiles are primarily aesthetic and impact protection). A metal or tile roof leak is almost always an underlayment failure — not a panel or tile failure. Specify and document your underlayment.
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Equivalent Products & Cross-References
| Equivalent / Alternate Product | Action |
|---|---|
| Deck-Armor (GAF) | |
| Rhino U20 | |
| Sharkskin Ultra |
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References & Industry Standards
- ASTM International. Standard Specifications for Single-Ply Roofing Membranes. astm.org
- FM Approvals. Factory Mutual Roofing Assembly Standards. fmapprovals.com
- UL LLC. Fire Classification of Roofing Materials. ul.com
- NRCA. The NRCA Roofing Manual. nrca.net