Hydrogap Sa Self-adhered Drainable House Wrap, 4.75' X 80'

Product Overview
Upgrade your home's moisture defense and structural longevity with the Benjamin Obdyke HydroGap SA Self-Adhered Drainable House Wrap (4.75 ft. x 80 ft.). Specifically engineered by moisture-management pioneers Benjamin Obdyke, this premium peel-and-stick weather resistive barrier (WRB) combines a continuous structural air and water seal with innovative drainable technology. Featuring an integrated matrix of 1mm compression-resistant spacers across the surface, it creates a true continuous drainage space behind your exterior cladding, allowing trapped water to channel away from your wall sheathing up to 100 times faster than standard flat house wraps.

Advanced Peel-and-Stick Building Envelope Defense
Unlike traditional mechanical house wraps that require hundreds of staple punctures and can tear in high winds, HydroGap SA features a 100% continuous, vapor-permeable acrylic adhesive backing. This peel-and-stick composition bonds directly to standard OSB, plywood, or exterior gypsum sheathing, entirely eliminating air leakage and water tracking beneath the wrap. Because it maintains a high vapor permeability rating, it allows the wall cavity to breathe and dry outward, preventing dangerous mold development, structural wood rot, and moisture degradation within the house framing.

Product Specifications

• Dimensions: 4.75 ft. Width x 80 ft. Length Roll
• Total Net Coverage: 380 Sq. Ft. (Square Feet) per roll
• Material Type: Self-Adhering Permeable Polypropylene Composite Membrane
• Adhesive Base: Vapor-Permeable High-Performance Acrylic Adhesive Backing
• Drainage Profile: Integrated 1mm Patented Non-Compressible Spacers (Creates instant drainage gap)
• Application: Premium High-Performance Residential Building Envelopes, Commercial Wall Assemblies, and Dense Rain-Screen Sub-Prep
• Brand: Benjamin Obdyke (HydroGap)
• SKU: HYDROGAPSA
• UPC: HYDROGAPSA

Key Framing & Field Installation Notes

• Temperature Application Threshold: For optimal initial high-tack adhesive bonding performance, roll out the self-adhering wrap when ambient outdoor and structural sheathing surface temperatures are 25°F (-4°C) and rising, removing the split-release liner backing as you proceed.
• Firm Pressure Roll Requirement: To activate the heavy-duty pressure-sensitive acrylic backing polymer cells and ensure an airtight bond, use a hand roller or stiff broom to press the membrane firmly flat against the clean structural wood sheathing panels, flattening out all air bubbles.

Frequently Asked Questions

• What is the benefit of a self-adhered house wrap over standard wrap? Mechanically fastened house wraps allow air and moisture to bypass the barrier through staple holes, loose seams, and wind-flapping tears. A self-adhered wrap completely seals itself to the sheathing, turning your entire wall assembly into an unbroken air barrier that reduces energy costs while stopping water from ever getting trapped behind the membrane.
• Do I need a separate rainscreen matrix when using HydroGap SA? The integrated 1mm spacers built into the face of HydroGap SA provide an exceptional baseline drainage space, making it perfect for direct installation under vinyl siding, fiber cement lap siding, engineered wood siding, and cedar shingles. For thick masonry stucco or heavy stone veneer layouts, a thicker, dedicated rainscreen matrix like Slicker may still be recommended.
• What is the required overlap spacing pattern for courses? When rolling out horizontal runs up a wall stud framework, ensure each sequential higher course overlaps the lower course by a minimum of 3 inches along the horizontal lap lines, matching the pre-printed lap markers on the wrap face. Ensure any vertical end-butt joints overlap by a minimum of 6 inches and are rolled down tight to ensure proper water shedding.

Available for yard pickup or flatbed jobsite trailer delivery from Rice Lumber Company in Shelburne, VT.