Red Seal Carpenter Practice Exam

What is the rough opening for the exterior door?

1. 856 mm x 2084 mm

2. 860 mm x 2182 mm

3. 860 mm x 2200 mm

4. 890 mm x 2190 mm

The correct answer is: 856 mm x 2084 mm

The rough opening for an exterior door typically includes extra space around the door frame to accommodate installation and adjustments, as well as any necessary shimming to ensure the door operates correctly. In this case, the standard rough opening for a common exterior door size, which is often 36 inches wide by 80 inches tall (approximately 914 mm by 2032 mm), suggests that a rough opening should generally be a few inches larger than the door itself to allow for framing and proper alignment. The dimensions provided in the first choice of 856 mm x 2084 mm suggest a width that is appropriate for a standard door size when accounting for the necessary space for installation. While the height is slightly below the conventional height of 2100 mm that can be used, it could potentially align with specific installation practices or regional standards where smaller openings are common. It's crucial for carpenters to recognize standard practices for constructing rough openings that allow for adjustments and to prevent issues like misalignment or difficulty in closing. Therefore, the answer aligns well with general rough opening requirements for exterior doors.