Multiple Assemblies

To determine rough/masonry openings (without brickmould casing):

  OVERALL MULTIPLE FRAME WIDTH OVERALL MULTIPLE FRAME HEIGHT
Casements & Awnings Add together the overall frame widths of each unit plus 1/2" Add together the overall frame heights of each unit plus 1/2"
Double Hungs & Sliding Windows Add together the overall frame widths of each unit plus 1/2" Add together the overall frame heights of each unit plus 9/16"

Box-to-Box (Narrow Mull) Assembly

Standard operating and stationary units can be combined box-to-box to achieve multiple assembly configurations.

Continuous Sill Assembly

Ultra and Heritage Series casements and awnings (i.e. crank-out, crank-out EP and push-out models) are an exception to the standard box-to-box assembly, in that certain units have continuous heads and sills. See the illustrations below for mull details. (VistaLuxe® Collection products are all mulled box-to-box.)

Ultra or Heritage Series Casement Mulls

 

Ultra or Heritage Series Casement Picture Window Mulls

 
 

Ultra or Heritage Series Awning Mulls




 

Size Limitations for Mulled Window & Door Units

An Ultra or Heritage Series mulled unit cannot exceed 168" (14 feet) x 108" (9 feet) overall. Larger sized mull unit assemblies may require alternate installation methods or field mulling. The glass ratio cannot exceed 6:1 for annealed glass or 8:1 for tempered glass. VistaLuxe Collection mulled units cannot exceed 120" (10 feet) x 96" (8 feet) overall.

NOTE: Large assemblies may be knocked-down by the factory for shipping and/or may need to be designed with structural reinforcement.

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