Most Bilco doors come in these standard sizes:
- Size C: 46" x 44" (most common residential)
- Size B: 60" x 44" (larger basements)
- Size D: 46" x 56" (deeper basements)
- Size E: 60" x 56" (largest residential)
- Custom sizes: Available for non-standard openings
To determine your size, measure the opening width and length. Check the door label or contact EcoSpect at (315) 757-4306 for identification help.