NAFS Certification for Our Windows and Doors

Windows and doors certified to NAFS

We are proud to have achieved NAFS (North American Fenestration Standard) certification with LabTestCert of Canada.

• NAFS is used in Canada and the United States to test and rate the performance of windows and doors.
• It grades products in four performance classes: R, LC, CW and AW (light, medium, heavy and severe duty).
• Testing covers ease of operation, air tightness, water tightness, wind load resistance, forced-entry resistance and durability.
• Thermal modelling determines the U-value, solar heat gain coefficient (SHGC), air leakage and energy rating (ER).
• Download our NAFS certificates

Our RSL38 tilt turn windows are rated up to NAFS Class CW-PG45.