What information do you need to prepare an accurate window and door proposal?

Send architectural drawings or elevations, a window and door schedule with opening sizes, performance targets such as U-value, wind load and acoustic rating, preferred frame finish and glass specification, plus the destination port and project timeline.

Why choose thermal-break aluminum windows instead of standard aluminum?

A thermal break is a low-conductivity polyamide strip that separates the inner and outer aluminum profiles. It reduces heat transfer, lowers condensation risk and allows the frame to reach much better U-values when combined with insulated Low-E glass.

Can Grandor customize sizes, colors and hardware for my market?

Yes. Profiles are extruded, coated and assembled in-house, so frame colors, wood-grain finishes, glass build-ups, hardware brands and opening configurations can be engineered to your drawings and local standards.

Do you supply large residential and commercial projects overseas?

Yes. The 155,000 m² factory supports wholesale and project orders of any size, with completed installations including residences in Brisbane and Melbourne, Australia, and Lake Norman, North Carolina, USA.

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