Pella 818T0101 - Manual (Page 14)

A. Insert backer rod into the space around the door so there is approximately
1/2" clearance between the backer rod and the face of the door frame.
Note: Backer rod adds shape and depth for the sealant line.
B. Apply a bead of high quality exterior grade sealant to the entire
perimeter of the door. At each end of the bottom of the door, insert sealant
into the spaces between the bottom of the door and the sill and connect it to
the perimeter sealant.
5A
5B
6A
6B
6
SEALING THE DOOR TO THE
EXTERIOR WALL CLADDING (CONTINUED)
C. Apply a bead of sealant between the exterior edge of the sill and
the sill support.
D. Shape, tool and clean excess sealant.
Note: This method creates a more flexible sealant line capable
of expanding and contracting.