Which type of greenhouse features a roof profile resembling a saw blade and is used for ventilation?

Which type of greenhouse features a roof profile resembling a saw blade and is used for ventilation?

• A. Sawtooth
• B. Quonset
• C. Lean To
• D. Even Span Green House

Answer: (A)

A sawtooth roof is a sawtooth-shaped profile made of repeating triangular teeth. This design creates multiple venting points along the roof: hot air inside naturally rises and can escape through the upper edges of each tooth while cooler air is drawn in from below. The glazing on the vertical faces often helps direct light into the space while preventing direct sun from overheating, making ventilation more effective overall. This combination—multiple vent openings plus controlled light—is why the sawtooth profile is used specifically for ventilation. By contrast, a Quonset greenhouse has a curved arch, a Lean To has a single sloping roof attached to a wall, and an Even Span greenhouse has a flat or uniform roof—none of these provide the same tooth-like venting pattern.

A sawtooth roof is a sawtooth-shaped profile made of repeating triangular teeth. This design creates multiple venting points along the roof: hot air inside naturally rises and can escape through the upper edges of each tooth while cooler air is drawn in from below. The glazing on the vertical faces often helps direct light into the space while preventing direct sun from overheating, making ventilation more effective overall. This combination—multiple vent openings plus controlled light—is why the sawtooth profile is used specifically for ventilation. By contrast, a Quonset greenhouse has a curved arch, a Lean To has a single sloping roof attached to a wall, and an Even Span greenhouse has a flat or uniform roof—none of these provide the same tooth-like venting pattern.