EFCO Special Purpose Windows Installation - Manual (Page 41)

EFCO 2014 2
Window Installation Instructions - Typical Subframe Installation Section
 Locate and install the subsill as shown on the shop
drawings.
 Note: The sealing of the subsill to the condiƟon is criƟcal to
the performance of the assembly and will vary greatly
based on the building condiƟon. The locaƟon of these seals
will be shown on the shop drawings.
 For perimeter anchor type and spacing, refer to the
approved shop drawings or consult the project design
professional. All anchorage clear holes, blocking, sealant
and perimeter fasteners are not by EFCO.
 It is cri cal that subsills are installed level and true for the
best water performance.
 Remove all debris from the subsill and cover all fastener
heads with sealant to ensure water ght seal. Tool the
sealant around the fastener heads so that the sealant
makes contact with the face of the subsill.
 Before installing subjambs run a bead of sealant around the
inside of the end dam and shown. This will help to ensure a
good seal between the subsill and subjamb. Complete this
step just prior to installing the subjamb otherwise the
sealant will skim and not create an adequate seal.
Subsill Installa on
Field drilled anchorage
clear hole
Fastener per shop drawings
(not by EFCO)
Seal over fastener
head and tool down
to subsill face
Sealant before
se ng subjambs
(don’t allow to skim)