Double Hung Windows

A double-hung window is a type of window that has two operable sashes that slide up and down. There are two main operable parts of a double-hung window. Both parts are able to open to provide ventilation.

Specification

FRAME:

  • Window frames are constructed of pattern grade genuine mahogany (Swietenia macrophylla).
  • Other suitable wood species for paint, clear and stain grade applications available.
  • Jamb thickness is 1 7/64″ (28mm); sill thicknessis 1 9/16″ (40mm); depth is 6 5/8″ (168mm); or milled to required project dimensions.
  • Window frames are built to +/- 1/16″ (1mm)tolerance.
  • Frames are manufactured with dado joints and are glued and screwed for maximum strength.
  • Finger jointing is not acceptable.

ADHESIVE:

  • All wood window components are bonded with a water resistant polyvinyl acetate industrial adhesive as manufactured by Kleiberit.

FINISH:

  • Undercoat and topcoat paint systems as available through Fine Paints of Europe.
  • Stain and semitransparent finish systems as available through the Sikkens program.
  • Other custom finishes available as required.

HARDWARE:

  • Traditional pulley and counterweight system standard.
  • Clockspring or vinyl liner balance systems available.
  • Brass, bronze or stainless steel sash locks, chains and lifts available.
  • Wire reinforced sash cord available.
  • Pulleys to be solid brass with ball bearings.
  • Counterweights to be stackable iron or enclosed lead.
  • Stationary or retractable screen options available.

WATER STRIPING:

  • Bronze weather stripping with a secondary brush gasket at vertical jamb lines and compression gaskets at horizontal sash rails standard.
  • Other gasket and metal weather stripping applications available.

WINDOW SASH:

  • Bronze weather stripping with a secondary brush gasket at vertical jamb lines and compression gaskets at horizontal sash rails standard.
  • Other gasket and metal weather stripping applications available.

FINISH:

  • Window sashes are constructed of pattern grade genuine mahogany (Swietenia macrophylla).
  • Other suitable wood species for paint, clear and stain grade applications available.
  • Standard sash thickness is 2 3/16″ (56mm) with sash components laminated for extra stability.
  • Other window sash thickness available as required.
  • Window sash widths and heights are built to +/-1/16″ (1mm) tolerance.
  • Standard window sash corners are constructed with double mortise and tenon joints.
  • Custom true divided lites (TDL) and/or simulated divided lites (SDL) in configurations as ordered.

GLAZING:

  • Standard insulated glass units are ¾” (19mm) thick with a ½” (13mm) air space. Other thickness available as required.
  • Glass options include but are not limited to: tempered, laminated, patterned, wire, spandrel, bent, restoration glass and various Low-E options.
  • Standard glass units are dual sealed with polyisobutylene/polysulfide or silicone and are certified by the IGCC to meet a CBA rating.
  • Glass units are blocked in glazing channel with neoprene setting blocks (70 – 90 durometer hardness).
  • Glass units are wet-glazed with a high performance one part silicone sealant (neutral curing).
  • Glazing channel is pressure relief vented and weeped.
  • Glass is retained in glazing channel by an interior wood stop nailed or screwed in place.
  • Other glazing systems available as required.

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