Tyvek StraightFlash 9 inch x 125 ft

DuPont™ Tyvek® StraightFlash™ – 9 in x 125 ft Self-Adhered Window & Door Flashing Membrane

DuPont™ Tyvek® StraightFlash™ is a professional-grade self-adhered flashing membrane engineered to provide robust air and water barrier protection around windows, doors, and wall transitions. Its reinforced construction and wider 9-inch format deliver extended coverage for larger openings and deeper rough openings where standard widths might require additional feathering or layering.

In simple terms: This flashing membrane seals straight runs around window and door frames to help keep wind and water out while integrating with the surrounding wall system.

StraightFlash™ features a durable Tyvek® topsheet and a high-performance butyl adhesive system that bonds reliably to common building materials when properly prepared. The scored release liner helps make positioning and installation more forgiving, while the wider format helps reduce overlaps and seams for cleaner detailing.

Best For

• Contractors: Flashing larger windows and doors, deeper rough openings, and transitions requiring broader coverage.
• Builders: New construction and remodel projects with expansive openings where high-performance flashing is needed.
• DIY/Homeowners: When you need a professional, wide-format flashing solution that integrates with Tyvek® WRBs.

Key Benefits

• Wider coverage: 9-inch width spans larger flange areas with fewer seams compared to narrower tapes.
• Durable membrane: Reinforced Tyvek® topsheet for jobsite handling and long-term performance.
• Butyl adhesive system: Designed for a strong moisture-resistant seal when installed properly.
• Forgiving install: Scored release liner helps with easier positioning and adjustment during installation.
• System compatible: Designed to integrate with Tyvek® weather-resistive barriers and accessory tapes.

Typical Applications

• Flashing larger window and door openings
• Flashing deep rough openings where extra coverage is needed
• Straight sill, jamb, and head flashing runs
• Large wall transitions requiring continuous flashing protection
• Areas where fewer seams and overlaps are desired

Specifications

Installation Notes (Best Practice)

• Surface prep: Apply to clean, dry surfaces free of dust, oils, and debris for best adhesion.
• Press and roll: Use consistent pressure to ensure full contact over the membrane width.
• Plan coverage: Wider format can reduce seams — align courses to minimize overlaps.
• Sequence installs: Flash openings in proper order (sill → jamb → head) to shed water effectively.

Why It Matters

Large windows and doors present a bigger challenge for air and water management. Using a wider self-adhered flashing membrane like Tyvek® StraightFlash™ 9 in x 125 ft helps reduce weak points, simplify detailing, and support long-term envelope durability when integrated with your weather-resistive barrier system.

Common Questions

Q: When should I use 9-inch vs 6-inch StraightFlash™?
A: 9″ offers broader coverage, reducing overlaps and seams on larger openings and deeper rough openings. 6″ is great for standard sizes where wide margins aren’t needed.

Q: Can this be used with Tyvek® HomeWrap® or CommercialWrap®?
A: Yes — it integrates with Tyvek® WRBs as part of a complete weather-resistive barrier system.

Q: Should I use this for curved or inside/outside corners?
A: No — for curved or corner details, a flexible flashing like Tyvek® FlexWrap™ is typically a better choice.