Brosco - Since 1890 The Leading Distrubution Source For Windows, Doors and Millwork
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CARE & FINISHING OF BROSCO

DOUBLE HUNG WINDOWS

*Failure to comply with these instructions will affect your warranty.


STORAGE AND HANDLING

 
  • Windows should always be stored in a clean, dry, well-ventilated building.

  • Do not store windows at the job site until concrete floors, foundations and plasterwalls are thoroughly dry.

  • Windows should not be exposed to excessive heat, dryness, or direct sunlight.


INSTALLATION (WINDOW UNIT)

 
  • Allow windows time to acclimate to a normal relative humidity for your area prior to installation.

  • Frame opening properly. Plumb, Level and Square.

  • Make sure opening is properly dimensioned. For masonry be sure to allow for caulking.

  • Close sash and secure lock (if applicable).

  • Center window in opening and make sure sill plate is level. Block sill from sill plate at side jamb area.

  • Shim at midpoint area between jamb and stud. Shim properly to avoid causing jambs to bow.

  • Check to make certain unit is plumb, level and square. Secure unit in wall by nailing through the exterior casing.

  • Insulate between jamb and rough opening on all sides with fiberglass insulation. CAUTION: Do not overpack insulation, which may cause jamb to bow. Avoid using expandable type foam insulation materials. This may also bow jambs causing difficult operation.


REMOVAL AND INSTALLATION (SASH AND BALANCES)

 
  • Allow sash time to acclimate to a normal relative humidity for your area prior to installation.

  • Carefully remove the side and head stops using a small prybar or stiff blade putty knife (in some instances, these stops may be held in place with screws). Do not discard, as you will make use of both the head and side stops again later.

  • Lift the bottom sash out of opening and detach sash cord, chain or other support method.

  • Remove the side and head parting beads. It may again be necessary to use a prybar. Retain the head parting bead, as it will be reused after the new sash are installed. Remove top sash by lifting out the opening and detaching the sash cord.

  • Remove the old sash pulleys and weights.

  • Insulate the window weight cavities.

  • Install new balances and sash according to instructions provided.

  • Test both sash to insure proper operation. Reinstall the head parting bead and window stops.


FINISHING

 
  • Finish must be applied to the window immediately after installation, but not during or immediately after high moisture periods.

  • Surfaces must be clean and dry.

  • Sand interior of window with 180 grit sandpaper.

  • Thoroughly remove all dust with a tack cloth before applying finish.

  • To finish the Exterior - use only a high quality paint, carefully following the manufacturer's instructions. Do not use dark colored paint on surfaces receiving direct sunlight. Only a high quality paint is acceptable as an exterior finish (stain is not acceptable as an exterior finish).

    Frame, casing and exterior face of sash is factory primed with acrylic latex primer.

    Paint all parts exposed to the elements with two additional coats of high quality exterior paint following manufacturer's instructions (including top and bottom of sash).

    All exterior finishes must have ultra-violet (UV) inhibitors in the finish.

    Apply top coats generously to bridge the gap between wood and glass. Lap paint onto glass 1/16" to protect against moisture penetration.

  • Do not paint the window balance or weatherstripping.


  • To finish the Interior - use a high quality paint or stain, carefully following manufacturer's instructions.

    The interior will accept stain more uniformly if a "pre-stain", "sanding sealer" or "conditioner" is used prior to staining.

    Apply semi-transparent stain or a clear undercoat to the interior.

    Apply three coats of clear top coat, such as varnish or polyurethane.

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