Grandor’s windows are listed with Intertek as evaluated to the Canadian performance standards for air tightness, water tightness and load resistance and Energy Performance. This entitles us to use the Warnock Hersey (WH) mark on our products.

We have tested to the following standards

CSA A440-00
AAMA/WDMA/CSA
101/1.S.2/A440-05 & 08
CSAA440.2.04

Grandor windows are Energy Star qualified.

To obtain Energy Ratings (ER) for our products:

• Click on the link above.
• Under the tab “Energy Star” Qualified Windows, Doors and Skylights”
• Select “List of Models-Windows”
• Under “Brand Name”, select “Grandor”
• Click the SEARCH key to obtain results

IGMAC, the Insulating Glass Manufacturers Association of Canada, was formed in 1968 to establish high standards of professional conduct in the design, manufacture, application, installation and maintenance of hermetically sealed insulating glass units.

Grandor is a member of the Ottawa Construction Association