EFCO 403X Series - Manual (Page 22)

Series 403X Storefront Installation Instructions
EFCO 2013 Page 22
Section 4B. Sill Flashing Installation (cont.)
Splicing Steps:
1. Verify Sill Flashing - Check to see that sill flashing has been installed correctly. Sill flashing to be spliced every 20’
- 25’. Splice locations are to be located at least 6” from any vertical intermediate mullion.
2. Splice Gap - Make sure a 1/4” gap is left at every sill flashing splice location.
3. Splice
Material - Use a silicone type sealant and a strip of WM01 bond breaker tape. Tape is to be 1 7/8” wide by
approximately 7 1/2” long.
4. Apply silicone to both sides of sill flashing ends and fill 1/4” void between sill flashing ends as shown in Fig. #23.
5. Center bond breaker tape splice over gap and set into sealant. Tool the sealant over the edges of the splice to
create a watertight seal.
6. Interior Gap - After the splice is installed, apply a cosmetic seal to the interior gap vertically up the splice. (Fig. #24)
Notes:
 These recommendations are for general erection procedures only.
 For actual job conditions, see the details on the shop drawings.
 Follow these splice guidelines at sill flashing corners also with one modification. No Gap.
Fig. #23
Fig. #24
Sealant
21T1 Sill Flashing
Sealant
Apply sealant to
interior gap.
21T1 Sill Flashing
Run sealant in 1/4” gap
between these two points.
Fill 1/4” void
between sill
flashings.
Bond Breaker Tape Splice