Punched window interface – installation sequence – Roxul ComfortBoard IS User Manual
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INSULATING SHEATHING FOR RESIDENTIAL CONSTRUCTION APPLICATION GUIDE
39
06. Punched Window Interface
– Installation Sequence
Step 1: Wood frame wall sheathed with OSB
or plywood with housewrap as drainage
plane.
Step 2: Modified “I” cut in housewrap over
framed opening (dashed line above)
Step 3: Housewrap folded in at jambs and sill
and secured tightly. Head flap folded
outward; or, tuck head flap under
Step 4: Install first piece of sill pan into
horizontal slit in housewrap. Pan must fit
tightly. Fasten at vertical face of pan only.
Step 5: Slip second piece of sill pan into
horizontal slit in housewrap; pan must fit
tightly. Fasten only at exterior vertical face.
Ensure a minimum 3” overlap at sill
Step 6: Tape or flash sill pan at jambs and sill
joint