Hydrogap Drainable Housewrap, 5' X 100' Roll

Product Overview
Safeguard your building envelope from severe weather, wind-driven rain, and moisture damage with Benjamin Obdyke HydroGap Drainable Housewrap (5 ft. x 100 ft.). Sourced through Coastal Forest Products, this high-performance weather resistive barrier (WRB) is engineered to provide superior moisture management behind exterior siding. Featuring an integrated matrix of patented 1mm non-compressible spacers, it creates a true continuous drainage space that allows trapped water or seasonal condensation to channel out of the wall assembly up to 100 times faster than traditional flat house wraps.

Advanced Moisture Management & Breathability
Unlike standard flat building wraps that allow water to pool against raw wood sheathing, HydroGap's drainable technology redirects liquid downward safely toward the base flashing. It is manufactured from a highly durable, tear-resistant composite polymer substrate that easily survives high jobsite installation winds. It maintains an optimal vapor permeability rating, allowing moisture within the structural wall cavity to escape and dry outward, preventing dangerous mold cultivation, framing degradation, and structural wood rot.

Product Specifications

• Dimensions: 5 ft. Width x 100 ft. Length Roll
• Total Net Coverage: 500 Sq. Ft. (Square Feet) per roll
• Material Type: Non-Woven Polypropylene Composite Tri-Laminate Membrane
• Drainage Profile: Integrated 1mm Patented Non-Compressible Spacers (Creates immediate water drainage path)
• Fastening Class: Mechanically Attached Weather Barrier
• Application: Premium High-Performance Residential Building Envelopes, Fiber Cement and Engineered Wood Lap Siding, and Cedar Shingle Underlayment
• Brand Source: Coastal Forest Products-LBM / Benjamin Obdyke
• SKU: HYDROGAP
• UPC: 1100710

Key Framing & Field Installation Notes

• Orientation Versatility: HydroGap can be rolled out horizontally or vertically over structural OSB or plywood wall sheathing panels. For proper moisture tracking, ensure the omnidirectional blue drainage spacers face outward toward the exterior siding material.
• Code-Approved Seam Management: Lap seams in a shingle-lap pattern to guarantee natural water shedding. Overlap horizontal seams by a minimum of 6 inches and vertical butt-joints by 6 inches. Seal all vertical seams and structural window/door transitions using HydroFlash flashing tape to complete the air barrier loop.

Frequently Asked Questions

• What is the benefit of a drainable house wrap over a standard flat wrap? Standard building wraps allow siding materials to press flat against the membrane, creating a capillary action that traps water pockets against the wall framework. HydroGap's 1mm dimpled spacers keep the siding slightly suspended off the wrap face, breaking the surface tension so water drains away before it can seep into nail penetrations or framing joints.
• Do I still need a separate rainscreen matrix when using HydroGap? HydroGap's 1mm built-in drainage space is perfectly rated for direct-to-housewrap installation under vinyl siding, fiber cement lap siding, composite siding, and traditional cedar siding courses. For thick masonry stucco, heavy stone veneer layouts, or advanced rainscreen specifications, a thicker structural matrix like Slicker may still be required.
• What fasteners are recommended for installing this house wrap? Secure the material using standard framing carpentry tools. For optimal tear resistance, fasten the wrap to the wood sheathing using cap-staples or cap-nails driven through a pneumatic housewrap gun. Standard construction staples can be used, but cap fasteners provide far superior holding strength against severe jobsite wind loads before the final exterior siding is installed.

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