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Keeping water out with dependable flashing

Most builders — particularly those involved in restorations — have seen firsthand how water damage can affect windows and the area surrounding them.

When rain or other moisture skids down the building envelope, it will find any available access—even a tiny hole—that will let it infiltrate the wall cavity. More often than not, this vulnerability is found at the window or door frame. Once moisture seeps inside, the area around the wall becomes fertile ground for rot and mold growth. Bad for the wall...and bad for any humans who live or work near it.

So, a critical component of any structure’s weather-resistive barrier system is sturdy flashing—a thin membrane that literally keeps water moving outward or downward, away from window and door joints or corners.

What to look for

Henry® Company delivers Building Confidence with a line of window and door flashings that effectively seal those penetrations, safeguarding the interior wall and keeping it dry. Here’s what we suggest you ask when you’re choosing a flashing product:

  • Can it be installed at any time of year, regardless of temperatures?
  • Is it durable enough to perform year-round in extremely hot or cold temperatures and harsh environments?
  • Does it display aggressive adhesion?
  • Can it resist UV rays for as long as a year?
  • Does it seal seamlessly around nails and fasteners?
  • Is it part of a total weather-resistive barrier system?

A good example of a solution that “has it all” is Henry Company’s new FortiFlash® 365 flashing membrane. It’s part of the complete Henry® Fortifiber® 1-2-3 Moisture Control System, an easy, three-step, mix-and-match approach that lets users select a weather-resistive barrier, a flashing and a sealant, and know that compatibility is assured. “This simple, customizable process lets our users tailor their selection, be more efficient, do the job once, and move on to their next project with confidence,” says Chris Yount, Henry Residential & Light Commercial.

The durable, extreme-temperature FortiFlash® 365 flashing membrane can be installed any day of the year, in temperatures as low as 0°F, and shows superior performance in all conditions, year-round. It features the latest in block copolymer technology for aggressive adhesion, and its reflective metalized face resists UV rays for up to 12 months, so it’s considered an excellent choice for projects that call for longer exposure.

Do it once, do it right

We’d like to share some flashing recommendations for the project design and construction phases, courtesy of The National Association of Builders1:

Design Phase

  • Ensure that flashing is integrated shingle-fashion with the WRB, window/door frames, and architectural elements (decorative trim), as required.
  • Check that caulks, sealants, and adhesives are compatible with the WRB and windows and doors.
  • Show all flashing details and installation sequences on plans, specifications, and scopes of work for subcontractors.

Construction Phase

  • Inspect all flashing components during construction for proper shingling and integration with the WRB.
  • Don’t rely on sealants or caulks as a substitute for flashing.
  • Install all products in accordance with manufacturer’s specifications, local building codes, or (where applicable) specifications established by the licensed design professional.


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