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HardieWrap® Weather Barriers: A Quick Guide


Josh Knese • June 2, 2020

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Along with the roof, the siding forms your home’s first line of defense against harsh weather conditions such as extreme heat and precipitation. It protects your exterior property and interior belongings from costly storm damage repairs. Fortunately, no matter what type of cladding material you specify, James Hardie® has an upgrade for you. As the premier company for siding, James Hardie developed HardieWrap® weather barrier solutions — your home’s second line of defense. In fact, the company also produced weather barrier protection for doors and windows. When compared to other brands, HardieWrap showed better results in most categories such as water holdout, air penetration resistance and tear resistance.

HardieWrap® Weather Barriers: A Quick Guide

HardieWrap Weather Barrier

HardieWrap Weather Barrier is largely composed of non-woven, non-perforated polyolefin film that is installed beneath the exterior siding. It provides further protection against water or air infiltration while maintaining breathability. This ensures to keep your walls dry, preventing chances of mildew.

HardieWrap Flex Flashing

This specific weather barrier solution is made from butyl rubber adhesive, which has good vibration dampening and superior age resistance on its own. HardieWrap Flex Flashing is designed to stretch and

seal around custom shapes, including windows and door sills, to prevent water and air intrusion. With Flex Flashing, you can be confident that any entry to your home is protected from moisture-related damage. There are trusted roofing companies that offer this solution when fixing your exterior.

HardieWrap Seam Tape

HardieWrap Seam Tape is designed to seal seams, whether vertical or horizontal, and small holes in the weather barrier. It adheres to most surfaces and contains no asphalt or other solvents. Similar to the Flex Flashing, it can be used to seal around doors and windows.

HardieWrap Pro-Flashing

This weather barrier solution is a butyl rubber self-adhesive created to peel and stick around windows and doors, preventing water and air leak. It can also be used to seal around fasteners.


With these various upgraded protection options from James Hardie, you can save your time and avoid making untimely calls to your local emergency roof repair company for exterior services.

If you’re planning to give your home an upgrade, turn to Exterior Building Solutions. Our team will be more than happy to assist you. Give us a call at (314) 470-8783 or fill out our contact form to schedule a free, no-obligation consultation. Our service areas include Chesterfield and St. Louis, MO.

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