Part 1: Prepare a Rough Opening for a Nail Fin Window Over Peel and Stick Housewrap

After installing a fully-adhered membrane, cut the window opening, fold in the sides, and use bevel siding and tape to create a positive-slope sill. To learn how to install nail-fin windows in 5 common wall types, check out this playlist: https://www.finehomebuilding.com/2019... When using a fully adhered membrane—in this case, Henry Blueskin VP100—as the wall’s water-resistive barrier (WRB), the window rough-opening preparations start with cutting the membrane flush to the top and bottom, but with a bit of extra at the sides so that these pieces can be wrapped across the face of the jack studs. To encourage drainage at the sill, should water ever penetrate that far, builder Jake Bruton also nails a piece of cedar siding to the sill, then covers the bevel siding with butyl flashing tape, paying careful attention to the corners where straight tape is most prone to pinhole leaks. Subscribe to our channel to stay up to date on new Fine Homebuilding videos:    / finehomebuilding   Connect with Fine Homebuilding: Instagram:   / finehomebuilding   Facebook:   / finehomebuildingmagazine   Twitter:   / fhbmagazine   Pinterest:   / fhbmagazine   About Us: The demand for high-performance, energy-efficient home construction is growing every day, and Fine Homebuilding is at the forefront of that movement. From job sites across the country, we showcase innovative, affordable, and build-able solutions.