Ridge vents are generally more effective because they can eliminate all of the warmest air. But box models are cheaper and perform better on low-slope roofs. They're also less likely to admit snow ...

These systems are self-flashing, meaning they don’t require any additional seals around vents ... shingled roofs, metal roofs ...

There's always moisture in the air, even on days without rain. A roof that's not built for that will fail faster and invite probl ...