Extruded PVC components produced from commercial quality virgin PVC (unplasticised polyvinyl chloride), conforms to AAMA 303 from sections in one piece, straight, true and smooth. Provide multi-chambered PVC extruded frames and sash in accordance with the manufacturers standard practice. Fusion welded frame joints strong enough to develop full strength of members. Head and jamb members shall have integral screen stops. Interior horizontal top surfaces of both meeting rails flat and in the same plane. Meeting rails have an integral interlock with two lines of pile weather-strip provided.

Operating Hardware: Operating sashes have two tandem brass rollers in a molded nylon housing mortised into the bottom of the panel(s) to provide smooth operation.

Locking Device: Each operating sash with two cam-action sweep sash locks. Operating sashes shall have one continuous, integral pull at their edge opposite the lock rail.

Glass and Glazing: Glass shall conform to DD-G-451 and not less than “B” quality. Factory glazed ¾” insulating glass conforming to ASTM-E-774, with warm edge seal spacer.  Glazing shall be integral glazing type system with architectural back bedded glazing tape and designed to maintain a watertight seal between glass and sash frame. Non-standard glass options will have a thermally improved box-type spacer with dual seal system.