EFCO 525 Series - Manual (Page 23)

& INSTALLATION
SECTION VII - SUBSILL FABRICATION
DPS 1/2004
Before installing the subsill, the exterior face location of the frame
should be found using bench mark information from the shop
drawings or architectural drawings. The subsill protrudes 1/4" to the
exterior of the exterior face of the frame. Locate this line based on
the bench mark information, and snap a chalk line to follow when
installing the subsill. The subsill exterior angled leg should follow the
chalk line for correct installation.
STEP 4) BENCH MARKS FOR SUBSILL LOCATION
Regardless of whether an end dam is used or not, the subsill must be
sealed to the condition to create a watertight condition when it is
installed. Begin the process by cleaning the bottom of the subsill with
a degreasing solution and wipe it dry after all foreign material has
been removed. When the subsill is clean and dry, apply a generous
amount of 795 silicone or equivalent silicone type sealant to the areas
shown in figures 24 and 25 on page 22. This should be done just
prior to the installation of the subsill to prevent the sealant from
setting up before the subsill is installed.
STEP 5) PREPARING AND SEALING THE SUBSILL
FOR INSTALLATION
An end dam may not be required in all cases. Before installing a
subsill without an end dam, you must determine if the surrounding
condition can be used to create a water dam, and if the material will
not degrade over time if it comes into contact with water. Once it has
been determined that the condition is appropriate to create a water
dam, continue the installation of the subsill as described in Steps 4-8
of this section.
STEP 3) SUBSILL INSTALLATION WHEN END DAMS
ARE NOT REQUIRED
(CONT.)
PAGE 21
525 IMPACT