Box Eave vs Regular vs Vertical — Which Roof Style Do You Need?

Roof style is one of the first decisions on any metal building project, and it affects far more than appearance. It changes the panel layout, the frame components, the hardware, and the overall material count. Here's what every installer and dealer needs to know about the three main roof styles.

Regular (Rounded / Bow Style)

The Regular style uses curved bows instead of angular trusses. The roof has a smooth, rounded profile — the classic carport look that's been an industry staple for decades.

• Roof panels run horizontally across the building width
• Uses bows instead of trusses, with a different connection method at the legs
• Typically the most affordable option
• Great for standard carports, RV covers, and utility shelters

Box Eave

Box Eave uses angular trusses with a distinct A-frame peak and squared-off eave corners. It gives the building a more finished, residential appearance.

• Roof panels run horizontally — same direction as Regular
• Angular trusses connect directly to the legs
• Squared eave corners create a clean, box-like profile
• The most popular choice for enclosed garages and workshops

Vertical

Vertical roof style uses angular trusses (like Box Eave) but with panels running vertically — from the eave up to the ridge, with a ridge cap at the peak.

• Roof panels run vertically — from eave to ridge on each side
• Requires hat channels on the roof as additional framing
• Best water and snow drainage — ribs run straight down the slope
• Preferred for commercial buildings, high-wind areas, and heavy snow regions

Quick Comparison

How Roof Style Affects Your Material Order

Changing the roof style doesn't just change how the building looks — it changes practically every line on the cut list. Panel quantities, cut lengths, frame components, and hardware counts are all different for each style. That's why switching styles in the middle of an order is such a headache when you're calculating by hand.