Before moving to next step, recheck the frame to confirm it is plumb, level and square and not bowed
4.3 Re-Hang sash on frame
Remove the upper hinge cover and push the hinge pin down. Tilt the lower hinge pin towards you
approximately 30 degrees. To prepare the sash for installation make sure there is no dirt in the lower
hinge of the sash and make sure the handle is in the turn position (as when sash is swung open to one
side). Get help to lift the sash, then set it down onto the lower hinge pin of the frame. Tilt the sash
towards the frame carefully and align the top of the sash hinge with the slot in the hinge body on the
As you tilt the sash into place, the shear arm at the top of the sash may disengage. If this occurs,
gently lift the arm upwards and move it parallel to the sash, then press it downwards until it "clicks" into
place. Push the upper hinge pin upwards until it "clicks" into place. The pin should easily click into
place. Align the sash to the frame so the sash hinge is flush with the frame hinge. Make sure that the
hinge pin is all the way up until the bottom is in line with the frame hinge. Replace the plastic upper
hinge cover and close the sash.
4.4 Check sash operation
Kommerling Windows and Doors
German Engineered 76MD072919
Kommerling squares the sashes and aligns them with the hardware at the factory. Operating problems
occur when the frame is not installed level, plumb and square, or when the frame or sash members are
not straight because of handling or incorrect installation.
Open and close the sash several times. The sash should operate freely without binding at any point
and all the hardware functions should operate smoothly.
If the sash does not operate properly or the hardware does not engage properly, the frames are not
installed plumb, square and level, or the frames have become twisted during anchor installation. For
help in diagnosing the cause of operating problems see section titled Troubleshooting sash operation
If the sash binds or strikes the frame at some point, or if the handle cannot be fully rotated to lock the
sash, there is a problem with the installation. Do not proceed with applying interior sealants until you
have corrected the sash operating problems.
If the frame is twisted towards the side of the rough opening, loosen anchor screws and use a flat pry
bar to straighten frame. Insert shims between frame and rough opening and re-tighten the anchor
If the frame is twisted away from the rough opening, try to twist it into position. If that is not possible you
may need to replace and re-bend the anchor so it does not deform the frame.
If the interior face of the frames is bowed, unscrew anchors in the affected area, straighten the frame,
and re-fasten anchors.
If the outside edges of the frames are bowed, follow the same steps as for correcting twisted frames
If a sash has become out of square or has become bowed and cannot be straightened, it will have to
be re-glazed and re-shimmed.
4.5 Establishing Continuity between the window unit and the other Components of
the Building Envelope
The window installation system should integrate into the building envelope and provide a continuous air
and water seal on all four sides of each window. To ensure success it is essential to have a thorough
understanding of the building system employed to prevent water and vapor penetration through the
In the absence of this information, Kommerling recommends following ASTM E 2112-01 guidelines for
sealing and flashing exterior windows. These guidelines provide instruction to achieve the best possible
protection against unwanted air and water leakage.
4.6 Remove sash spacer shims
Kommerling Windows and Doors
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