EFCO 406X Series - Manual (Page 16)

Series 406X Storefront Installation Instructions
EFCO 2014 Page 16
Section 4B. Sill Flashing Fabrication
Fabrication Steps:
1. Cut Length - Measure the rough opening width. Subtract a 1/4” per sill flashing end for the thickness of the water
dam and the fastener head height from the rough opening.
 With End Dams: CUT LENGTH = ROUGH OPENING - 1/4” x (# of ends with end dam)
 Without End Dams: CUT LENGTH = ROUGH OPENING
2. Weep Holes - Drill a min. 5/16” diameter holes in the sill flashing 6” from each end and at no more than 42” apart.
(Fig. #15)
3. Weep Baffles - Take (1) HCW6 baffle and cut in half to dimensions in Fig. #15. Apply Sealant along bottom and
locate them over the weep holes as shown below.
4. End Dam Installation - Attach the sill flashing with 1 - SPZ1 fastener per end dam. Apply a bead of silicone sealant
to the end of the sill flashing prior to attaching the end dam. Tool the sealant at the interior joint of the end dam (see
Fig. #16) to ensure a good watertight seal.
5. Sill Flashing without End Dams - Install sill flashing tight to the condition and then proceed to seal joint between sill
flashing and condition. To ensure a watertight seal use silicone style sealant and tool seal similar to Fig. #16 below.
Weep Baffle
Sealant
HCW6
5/16” Dia. Weeps
21V1 Sill Flashing
Sealant
Sealant
21V1 Sill Flashing
KP30
End Dam
Fig. #15
Fig. #16
KP31
End Dam