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Find your IRS documentation here:
Northerm Certification Statement
Vinyl Windows - Details
Return to Vinyl Windows
Performance
Lifetime Warranty


Northerm Window Performance
[ TOP ]
Type Glazing U Value R Value
Casement Insul-Therm Triple Pane .20 5.00
Casement Insul-Therm Double Pane .28 3.57
Awning Insul-Therm Triple Pane .19 5.26
Awning Insul-Therm Double Pane .28 3.57
Fixed Insul-Therm Triple Pane .15 6.67
Fixed Insul-Therm Double Pane .26 3.85

Northerm Window Lifetime Limited Warranty [ TOP ]

Northerm Windows purchased on or after April 1, 2008 are covered by the Northerm Window Lifetime Limited Warranty.

A printable PDF of the warranty may be downloaded here.