Mull post replacement – Therma-Tru Doors Repair and Replacement User Manual
Page 17
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Repair and
Replacement
SITE 5
2014
5.17
Mull Post Replacement
Install New Mull Post
Apply Elastomeric or Polyurethane sealant
to bottom end of mull post and insert into
sill detail.
Pre-drill holes on an angle through mull
post and then secure with screws into sill
and head frame.
Slide head end of mull post into head mortise pocket.
2” exterior
grade screws
Pilot hole
Sealant
Mullion end cut for adjustable sill shown.
Head Jamb
Mullion
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