While most 
windows are
installed 
using screws
through the
frame into the
rough opening,
or through 
fasteners used
with nailing
fins or flanges,
there are 
circumstances
where another
mounting 
system works 
better.
Installation
clips, which 
are basically
flat steel straps
are fitted with
holes so they can be mounted to the window frame,
and then mount to the rough opening.
This mounting system is especially suited for
brick or masonry veneer openings, and for opening in
block or poured concrete openings where traditional
mounting methods are difficult
The window manufacturer or the architect/engi-
neer on the job often recommends the placement and
number of the clips. These recommendations are
necessary because the size, quantity and placement
will depend on the size of the window and the project
site’s required wind pressure psf. This information
can be obtained from the building designer, code offi-
cial, or directly from the building code. 
The clips will be supplied by the window manu-
facturer and will specifically fit their frame profile
either by “snapping in” or screwing into the window
frame directly. Wood window and uPVC window can
effectively use clips.
To accommodate various wall configurations,
clips can come in more than one size. Common are
6” - 7” (short) and 10” to 12” (long).
Common factory clip schedules are based upon
20 psf wind pressure. This can be a concern when a
product has a rating greater than 20 psf and the pro-
ject site’s required wind pressure is greater than 20
psf. Therefore, it’s important to determine if the fur-
nished number of is sufficient or additional clips are
needed.
Installing with
Jamb Clips
Installation Clip
Frame 
Jamb
Groove
Frame
Jamb
Groove
Window Fitters Guide to Window Installation 
83                ©2022 AWDI, LLC Do not reproduce without permission
SAMPLE MANUAL

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