JELD-WEN JII100 Custom Wood and Fiberglass Door Systems - Manual (Page 8)

8
Prepare Jamb System for Installation
Jamb and Door Installation
1. Tip jamb unit into rough opening, paying close attention to prior marking for sill location.
2. CHECK SILL FOR LEVEL. Correct before installing (Fig. 20).
3. Checking jambs for straightness, level and plumb, apply shims from interior and exterior of
house as follows: (These numbers and locations of shims are meant only to serve as a
minimum requirement. Depending on the application and size of the unit, more shims may
be required.)
A. SYSTEMS 1 & 2 (Fig. 21); shim as follows:
• Shim the jambs as follows:
• Behind each hinge.
• At the top and bottom of each jamb (at the pre-drilled holes behind the
weatherstrip).
• Behind the strike plate.
• Head jamb at center and 6" from each end.
• For 8' doors, more shims are needed at the jambs.
B. SYSTEMS 4 & 5 (Fig. 22); additional shimming as follows:
• On the sidelight jamb leg at approximately 2" and 30" from both the top and
bottom of the frame.
• Above the head jamb at the center of the door(s) and directly above the mull.
C. SYSTEM 3; additional shimming as follows:
• On the sidelight jamb leg and the strike or hinge jamb leg at approximately 2" and
30" from both the top and bottom of the frame.
• Above the head jamb 6" from each corner, at the center of the door and directly
above the mull.
NOTE:
COMPOSITE FRAME INSTALL ATION
RECOMMENDED PRACTICES FOR JAMB INSTALL ATION
A. Fastener and shim spacing should be set at 16" or less.
B. Pre-drill and countersink for 2" fastening screws under the area covered by the
weatherstrip.
C. Index the shims to fasten through and make sure to locate one set of shims under
each hinge.
D. At least one screw per hinge should be long enough to run through shim into the
supporting wall stud.
Fastening casing and brickmold should be the same as for any wood jamb. Any strike prep
or other machining can be made with traditional tools, etc.
4. Cross side jambs with string, checking for square, and plumb to ensure no rack. Adjust
shims as necessary (Fig. 23).
Fig. 20
Fig. 21
Fig. 22
Fig. 23