5 SEALING THE WINDOW TO THE EXTERIOR WALL CLADDING (continued)
A.Insert backer rod into the space around the window approximately 3/8" deep. This should provide at least a 3/8" clearance between the backer rod and the exterior face of the window.
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 window.
C.Shape, tool and clean excess sealant. When finished, the sealant should be the shape of an hourglass.
Note: This method creates a more flexible sealant line capable of expanding and contracting.
5A
5B |
Additional cutting patterns:
| Half Circle |
Full Circle | Quarter Circle |
Oval | Circle Head |
Right Triangle
Arch Head | Dog House | Trapezoid | Rectangle |
Octagon
