Roofs, explained.
Plain-English, illustrated guides to roofing materials, flashing, gutters, ventilation and repairs: how each part of a roof works, what usually goes wrong, and what to check before a small problem becomes a big one.
Start with what you need help with
Pick a topic. Every guide starts with the answer and then explains why.
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The guides we start with for the questions homeowners ask most about their roofs.
Our first guides are on the way.
Latest guides
New illustrated guides every weekday.
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How a Roof Works: Layers, Parts and Water Flow
Framing, deck, underlayment, flashing and covering: how the layers of a roof divide the work of keeping water out, and how rain travels from ridge to…