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Sizing Options for VELUX Traditional Domes

Round Domes

Inside Curb Dimensions

CT1/CG1

	Acrylic - Flat	Impact Modified Acrylic - Flat	Impact Modified Acrylic - Prismatic	Polycarbonate - Flat	Polycarbonate - Prismatic
Maximum Size	60 x 96	60 x 96	N/A	60 x 96	N/A

CT2/CG2

	Acrylic - Flat	Impact Modified Acrylic - Flat	Impact Modified Acrylic - Prismatic	Polycarbonate - Flat	Polycarbonate - Prismatic
Maximum Size	60 x 96	60 x 96	60 x 96	60 x 96	54.5 x 96

Hip Ridge and Pyramid Domes

Inside Curb Dimensions

CH1/CJ1 Hip/Ridge

	Acrylic - Flat	Impact Modified Acrylic - Flat	Impact Modified Acrylic - Prismatic	Polycarbonate - Flat	Polycarbonate - Prismatic
Maximum Size	60 x 96	60 x 96	N/A	60 x 96	N/A

CH1/CJ1 Pyramid

	Acrylic - Flat	Impact Modified Acrylic - Flat	Impact Modified Acrylic - Prismatic	Polycarbonate - Flat	Polycarbonate - Prismatic
Maximum Size	72 x 72	72 x 72	N/A	68 x 68	N/A

CH2/CJ2 Hip/Ridge

	Acrylic - Flat	Impact Modified Acrylic - Flat	Impact Modified Acrylic - Prismatic	Polycarbonate - Flat	Polycarbonate - Prismatic
Maximum Size	60 x 96	60 x 96	60 x 96	N/A	N/A

CH2/CJ2 Pyramid

	Acrylic - Flat	Impact Modified Acrylic - Flat	Impact Modified Acrylic - Prismatic	Polycarbonate - Flat	Polycarbonate - Prismatic
Maximum Size	72 x 72	72 x 72	66 x 66	N/A	N/A