EFCO Special Purpose Windows General Maintenance Instructions - Manual (Page 6)

General Service and Maintenance Manual
SECTION 2
GLASS CARE MAINTENANCE AND CLEANING
2.c. DEGLAZING AND REGLAZING FOR WET GLAZED APPLICATIONS
Deglazing of Broken or Defective Glass
1. Remove glazing beads by applying pressure to the inside lower edge of the bead to compress
the glazing vinyl. While maintaining inward pressure give a slight upward movement. If the
bead is tight it maybe necessary to insert a putty knife in the crevice between the bead and
the sash of the frame then give a slight twisting motion as pressure is applied to the bead.
2. Remove broken or defective glass—in some cases it may be necessary to cut the old sealant
loose from the glass by running a utility knife between the glass and the glazing leg.
3. Remove all existing sealants and dirt from the glazing surface of the sash or frame. This is
usually done by scraping with a putty knife or similar object.
4. Wipe down the sash or frame glazing surface with a solvent saturated oil-free cloth. Suitable
solvents include xylol, toluol or methyl ethyl ketone. Always follow the manufactures’
instructions for handling of solvents.
Glazing/Reglazing the Window
1. Apply a bead of silicone sealant to the glazing surface. Glazing surfaces should be prepared
in accordance with the sealant manufactures’ instructions to assure good adhesion.
Surrounding temperatures must be within the sealant manufactures’ specified range during
application and curing. Special attention must be given to condensed moisture or frost on cold
metal surfaces with can occur if glazing when temperature in below 40̊ F.
2. Install setting blocks and edge blocks—glass should always be set on two identical rubber
setting blocks of an acceptable rubber material having a shore a durometer hardness of
85+/-5. The setting blocks should be the proper size and design to assure full bearing
surface of both lites of glass in an insulated unit.
3. After inserting the glass, reinstall horizontal glazing beads and then the vertical beads by
applying an inward pressure on the inside bottom of the bead with a slight downward
pressure. Some types of glazing may require a slight tap from a rubber hammer/mallet to get
the bead started.
4. Clean off excess sealant with a clean cloth or paper towel.
5. Allow sealant to cure a minimum of 24 hours before operating the window, see sealant man-
ufacturers’ instructions for actual cure time.
NOTE: EFCO Corporation assumes no responsibility for failure of insulated glass units
due to faulty installation.
EFCO CORPORATION 2013 PAGE 5