Window Fitters Guide to Window Installation 
34                ©2022 AWDI, LLC Do not reproduce without permission
Install the New Window
1. Place the window in the opening by placing the inside lower edge on
the outside sill tightly against the stool. Tilt the window into the open-
ing taking care to have the outer edge rest securely on the sill angle.
(Fig. 12).
2. Check for plumb (vertical) and level (horizontal). It is important that
the window remain square in the opening even if the opening itself isn't
square. Use flat shims to keep the window square. 
3. Place the shims behind the mounting screw holes. There are 2 screw
holes on each side at the top and bottom. Tighten the screws "finger
tight." Use flat shims or non-tapered shims. Tapered shims can contort
the frame which may impede smooth operation of the sash. (Fig. 13)
Note: Some windows may have a "butterfly" clip with an adjustment
screw in the center of each side. This adjuster eliminates the need for
shims in the center of the window. Adjust the clips "finger tight". Do not
over-tighten. If you over-tighten, the frame will deform and the window
may not operate correctly. Bar Clamps (Fig. 14) keep the window plumb
and square while it is fastened avoiding deformities during anchoring.  
Level
Use Flat
Shims
Fig. 12
Install 
Screws
Fig. 17
4. Push the head expander up tight against the upper part of the 
opening. Replace the upper inside moulding tight against the expander.
Secure the expander, if necessary, with the two small screws provided.
(Fig. 15-16)
5. Replace the side inside mouldings tight against the window. 
Caulk against the inside mouldings and window to seal any gap. 
If you desire, you can replace the inside mouldings. (Fig. 17)
6. Caulk outside where the sill angle meets the sill. Take care to seal
any gap (Fig. 18-19). Leave drainage holes.
7. Caulk outside where the window meets the blindstop,
Fig. 13
2"
Fig. 16
Fig. 15
Fig. 14
SAMPLE MANUAL

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