b'Installing Replacement Vinyl Windows in StuccoWhen retrofitting Vinyl Replacement Windows inan existing stucco finished opening, it is important to remove the old metal window protrusions to apoint where the old window is flush with the interiordrywall return.The new window should be fittedwith an exterior trim piece (either integral or snap-in)that extends over the existing exterior stucco finish.The illustration below shows the new window,placed in the old opening, and how it is to be caulkedand sealed both inside and out. This is commonlycalled a jump frame installation.Remember the following:1. The Frame should be anchored to structuralframing with screws.2. Screws shall be minimum of #8, non-corrosive.3. Screws shall not be placed in fin.4. Retrofit window frame shall not be attached tothe old window frame.5. Fin shall not be installed over lap siding.6. Elastomeric (see caulking section) caulk shall Care to preventbe installed Water Intrusion- Between the fin trim and exterior wall The wide flange willsurface (stucco) and, cover the old window- Around the perimeter of square-edged fins and overlap the 7. The sealant bead shall be continuous except for exterior stucco. small gap(s) near center of bottom fin (for It is difficult to drainage) construct a drip cap8. Unlike materials shall not be placed in contact over the flange.Toowith each other. often water When the old window contains a fin and is mounted will run down theunder exterior casing, as is also common in stucco outside of the wallover wood construction, the exterior casing can be and down betweenremoved, and the old finned window removedthe flange and thewithout disturbing the weatherability of thewall and eventuallyunderlying construction. cause problems.Note:Block to Level oldSill provides Support. It can be made out oflumber or cellular PVCVinyl Replacement Window in a Jump Frame Stucco Application Jump-Frame Sill Details w/ applied leveling BlockWindow Fitters Guide to Window Installation742020 AWDI, LLC Do not reproduce without permission'