If you have determined that the old wood window
frame is adequately interfaced with the existing 
wall’s water management system, Vinyl Replacement
Windows are designed to fit neatly and effortlessly
into the opening left by the removal of the existing
sash in an old wood window. Sized perfectly, the 
3-1/4" frame fits into space where the sash and 
parting stops were. 
The head expander and sill angle which are supplied
with most vinyl windows accommodate the variances
that time and weather made in the old window frame. 
The new window is anchored to the old wood 
window frame - against the exterior or "blindstop",
and the interior stops are re-installed to complete 
the installation.
In order to have a successful installation, it is 
important to accurately measure for the new vinyl
replacement window and specify the appropriate size. 
Properly measured and ordered, the new window 
will fit perfectly, with minimum effort, and provide 
an installation that will give years and years of 
satisfactory performance.
Before You Start
Read these instructions carefully and identify 
all the pieces to be removed or added during the 
installation. Not only are the basics easy and simple,
but all work can be done from inside the house.
Some windows are shipped with bands around 
the middle of the window - or have some other
arrangement to keep the unit in square. Do not
remove the bands until the unit is in the opening 
and secured.
Tools You Will Need
Modern, quality, vinyl replacement windows need
only simple hand tools for installation. 
Some other considerations
When replacing an old window with a modern vinyl
replacement window, you will no longer need storm
windows or separate screens. If there are screens or
storms mounted to the outside of the house, it might
be better if they were removed. This will give you the
opportunity to thoroughly clean the opening and seal
or paint any problem areas. If you wish to re-mount
the storm windows, they will not interfere with the
new replacement window.
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Frame-In 
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Windows
Window Fitters Guide to Window Installation 
30                ©2022 AWDI, LLC Do not reproduce without permission
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