Pella® Impervia® Single-Hung Window
Detailed Product Description

Frame 
•	Frame is Duracast® fiberglass composite — five-layer pultruded fiberglass material [with optional foam insulation1] reinforced with a Pella patented interlocking mat.
•	Overall frame depth is 3".
•	Nominal wall thickness of Duracast fiberglass composite members is .050" to .070" thick.
•	Frame corners are mitered, joined and bonded with corner lock and mechanically fastened with injected polyurethane adhesive.  
•	Sill is fitted with weep valve assemblies.
•	Jambs contain factory drilled (counter-bored) installation screw holes. Block and Flush Flange frames only. 
•	Optional factory-applied jamb extensions available in 4-9/16" and 6-9/16".
Sash 
•	Sash is Duracast fiberglass composite—five-layer pultruded fiberglass material [with optional foam insulation1] reinforced with a Pella patented interlocking mat.
•	All sash members have mitered corners bonded with corner lock and sealed with injected polyurethane adhesive.   
Exterior/Interior 
•	Duracast fiberglass composite surfaces with powder-coat paint finish.
•	Color is [White] [Brown] [Black] [Tan] [Morning Sky Gray].
– or –
•	Dual-color option [Brown] [Black] [Tan] [Morning Sky Gray] exterior with White interior2.
Glazing System
•	Quality float glass complying with ASTM C 1036.
•	11/16" insulating glass [[annealed] [tempered]] [obscure3] [[clear] [Advanced] [SunDefense™] [SunDefense+] [AdvancedComfort] [NaturalSun] [NaturalSun+] Low-E coated, with argon]] sealed and bonded to sash.
•	High altitude glazing [with argon] available.
Weatherstripping 
•	Sash is weatherstripped around the perimeter with a dual fin-type pile weatherstrip.
Hardware
•	Galvanized block-and-tackle balances connected to sash with polyester cord and concealed within the frame.
•	Lower sash shall be fully operable for ventilation.
•	Window jamb has take-out clips to remove vent.
•	All fasteners are of a corrosion-resistant material.
•	Two locks are installed on units 37" wide or greater.
•	Locks are zinc die-cast, self-aligning cam action factory-installed on the interlocker [powder-coat painted [White] [Brown] [Black] [Tan] [Morning Sky Gray] to match finish] [Satin Nickel] [Bright Brass] [Oil-Rubbed Bronze].
Optional Products
Screens
•	InView™ Screen
•	Half-size with black vinyl coated 18/18 mesh fiberglass screen cloth complying with SMA 1201.
•	Set in aluminum frame and fitted to outside of window.
•	Supplied complete with all necessary hardware.
•	Screen frame finish is baked enamel, color to match exterior.
Grilles
•	Grilles-Between-the-Glass
•	Insulating glass contains 3/4" contoured aluminum grilles permanently installed between two panes of glass.
•	Grilles are factory prefinished [White] [Brown] [Black] [Tan] [Morning Sky Gray] to match interior and exterior finish.
Hardware
•	Optional limited opening device available for field installation on vent units in [White] [Brown] [Black] [Tan] [Morning Sky Gray] vinyl to match interior of unit; nominal 3-3/4" opening.
•	Optional window opening control device available for field installation.  Device allows window to open less than 4” with normal operation, with a release mechanism that allows the sash to open completely.  Complies with ASTM F2090-10.
•	Optional field applied Duracast sash lift available for vent units in [White] [Brown] [Black] [Tan] [Morning Sky Gray].

(1)	Foam insulation inserts are not available with clear glazing.
(2)	Dual-color finish is not available on products with integral nailing fin.
(3)	Obscure glazing is not available when AdvancedComfort Low-E coated IG is specified.