Benjamin Obdyke HydroGap Drainable Housewrap 5 ft x 100 ft – HGAP5
Regular price $206.00Benjamin Obdyke HydroGap HGAP5 is a 5 ft x 100 ft drainable housewrap roll for wall assemblies where a standard flat WRB is not enough. Its 1 mm drainage spacers help bulk water move down and out behind siding while the membrane remains vapor permeable.
Key Specs
- Model / MPN: HGAP5
- Brand: Benjamin Obdyke
- Type: Mechanically fastened drainable housewrap / WRB
- Roll size: 5 ft x 100 ft
- Coverage per roll: 500 sq ft nominal
- Drainage gap: 1 mm spacer technology
- Vapor permeance: 16 perms in source record
- Best-use wall types: Siding assemblies needing bulk-water drainage
- Sell unit: Roll
Coverage & How Much You Need
One 5 ft x 100 ft roll covers 500 sq ft before overlaps, window/door cuts, waste, and flashing integration.
- Coverage is nominal roll area; overlaps and openings reduce installed coverage.
- Add project waste for valleys, corners, penetrations, windows, doors, and staging damage.
Compatibility / Fitment
Use as part of a mechanically fastened WRB/drainage system with compatible flashing tapes and window/door details. Do NOT use it as a substitute for a full rainscreen cavity where the cladding manufacturer or architect requires one, and do not skip flashing integration.
FAQs
How much wall area does one roll cover?
The roll is 5 ft x 100 ft, or 500 sq ft nominal before laps, cutouts, and waste. Add waste for openings, corners, overlaps, and staging damage.
What makes HydroGap different from flat housewrap?
HydroGap uses 1 mm spacers to create a drainage path for bulk water behind the cladding. That helps water exit the wall assembly instead of staying trapped against the sheathing.
Is it vapor permeable?
Yes. The source record lists 16 perms, and Benjamin Obdyke positions HydroGap as vapor permeable so wall moisture can dry while bulk water drains.
What siding types is it for?
It is commonly used where siding assemblies benefit from drainable WRB performance, especially composite and fiber-cement siding projects. Always follow the cladding manufacturer’s WRB/rainscreen requirements.
What accessories should I order?
Plan for compatible flashing, sill/corner details, seam tape, cap fasteners, and opening treatment. The WRB only works when shingled laps and flashing details move water out of the wall.
Wall weatherization work involves ladders, cutting tools, and weather exposure. Follow site fall protection and manufacturer fastening/flashing instructions.
Product Expert Notes
A practical pro listing because the buyer needs drainage behavior, roll coverage, vapor permeance, and flashing-system reminders — the details that reduce callbacks behind fiber-cement or composite siding.
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