Bucking the
Opening
It is best to install a
wood buck to cover 
the old joint. 
Use Tapcons of 
sufficient length to
penetrate the 
masonry 1-3/8”.
Fully Removing
the Old Steel
Frame
If the old window is
mounted in a masonry
opening or an opening
with a masonry or brick
veneer, and the old
window is completely
removed, frame and all,
the  cavity materials
are exposed and the
concrete embedment is
cracked and broken
making proper 
weatherization difficult
and hard to provide a
stable surface for
mounting the new 
window. 
Removing the Steel Frame is a destructive process which
can chip the concrete embedment and expose the cavity
insulation and other materials between the brick facade
and the interior wall. This must be covered in order to 
re-create a weather barrier. It is difficult to properly seal
the cavity and provide an adequate mounting surface.
The new window can be anchored directly to the
brick/wall with sufficient weatherization materials
between the window frame and the cavity. Perhaps the
better way is to install a properly weathersealed wood
buck around the opening, and then anchoring the new
window to it.
Mounting the 
New Window
Foam wrap the new
window and insert into
the opening. Use Screw
fasteners of sufficient
length to penetrate the
wood buck 1-3/8”. 
It is best to avoid 
penetrating the sill.
Finish Sealing
Mounting to the wood
buck will leave the 
outside face of the buck
exposed. Use finish
capping (aluminum or
pre-fab trim) to seal the
exterior to the weather. 
Allow adequate sill
drainage.
Sealant
Exterior
Trim
Pieces
Exposed
Buck
Window Fitters Guide to Window Installation 
68                ©2022 AWDI, LLC Do not reproduce without permission
SAMPLE MANUAL

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