For recessed window flashing i am most familiar with the details provided by dupont and fortifiber and have confidence in either approach.
Dupont window flashing details.
Dupont straightflash vf versa flange is an innovative dual sided self adhered flashing material that provides a reliable moisture seal to integrate brick mold non integral flanged and non flanged windows and doors with the building envelope.
By helping to seal the building envelope self adhered dupont flashing tape can help reduce the risk of water damage increase.
When installed properly dupont straightflash dupont flexwrap nf and dupont flashing tape provide nail sealability at window door openings to help protect critical window wall interfaces.
Dupont self adhered flashing for garage doors installed after wrb.
Recessed window installation greater than 4 inch recess after wrb.
View the complete dupont flashing systems guidelines for windows and doors.
When flashing windows or doors the following principles must be followed.
This allows it to provide easy one step insulation for hard to seal corners around windows and doors.
It is also acceptable to use dupont window and door foam or recommended foam.
Wind driven rain and outdoor air can find their way into walls around windows and doors.
Another option gaining in popularity is liquid or fluid applied membranes.
Dupont flashing tape for inside and outside wall corners.
Dupont flexwrap self adhered flashing does not require mechanical fasteners even in flexed corner areas around building openings.
Dupont flashing tape helps protect the heads and jambs of rectangular doors and windows from air and water intrusion.
Dupont flashing systems installation guidelines step 5 install dupont residential sealant dupont commercial sealant or recommended sealant and backer rod as necessary around the window opening at the interior.
Huber makes a product called liquid flash that integrates with their zip system.
Metal sill pan flashing may be used but must.
By bridging the interface between the fenestration and the water resistive barrier dupont straightflash protects these vulnerable areas that are so often subject to potential water damage.