b'Outside-In Installation ofBox Frame WindowsBox Frame Installation of vinyl replacement windows Making theis based on "blindstop" techniques where the windowDecisionis set into the opening from the inside of the house.The decision toOutside-In installation is accomplished from theinstall a replacementoutside the house and leaves the interior stops window from theintact. Paring away the exterior blindstop, removing outside in, againstthe parting stops and both sash provides a clear the interior stops, byopening to install the window from the outsideremoving the without disturbing the interior and without having exterior stops,to lift it over the stool to place it in the opening. requires more This is an advanced technique that is somewhat outside work, more complicated than the traditional "blindstop" but this method method. But its advantage lies in giving satisfactory of installation results while probably being a more effective method has many addedfor installing all vinyl replacement windows. But, it is benefits:important that the old window frame is adequately 1. The interiorintegrated into the water management system of the stops dont need towall, or you should use frame out techniques. be removed and replaced whichOutside-in installation will require access to the makes a better look-opening from outside the house, and though theing installation sincewindow can be passed out of the opening from the there is no damageinside before it is set in place, it may be an advisable to over-painted inte-and safer method to set the window in place fromrior stops or mould-the outside. For openings above the ground floor, oring, etc. The job isfor large or heavy windows, it is not recommended cleaner and neater.that outside-in installations be done by one person. 2. Since the exterior is to be re-finished in mostProper Flashing isRecommended instances, there is a work savings by not having to remove and replace the inside stops. 3. It is easier to brake and install capping to finishoff the exterior of an opening without a blindstopIf you leave the old frame than to cover an old blindstop. The capping looksin, and install from the out- better, too.side, it is best to flash 4. Most Replacement Windows without headthe opening. expanders fit better against interior stops without the1/8" offset of the material thickness of the expander.Using liquid flashing on 5. The installation is more energy efficient andthe sill, a pan can berequires no insulation stuffed into the headcreated that will allowexpanderany water intrusion to 6. More glass and egress area is possible without adrain to the outside. head expander. The window can be made taller.Using adhesive-backed These advantages have to be weighed against theapplied flashing on the labor of chipping away the blindstop and shimmingjambs and header, make and squaring the opening from outside. The dia-sure the jamb overlaps the grams show that the exterior blindstop, whensill, and the header flash- removed, clears the opening allowing a full height,ing overlaps the jambs. full width window to be securely installedwithout the use of a head expander.Window Fitters Guide to Window Installation482020 AWDI, LLC Do not reproduce without permission'