Oh man, @matthew878, I think you meant to reply to simonk98, not yourself. (Easy to do on this app, honestly.) But yeah, that slow move is so important.

Wait, did chen.olivia say a 30-pound synthetic is enough for Seattle? I gotta disagree there, the constant damp here is a different beast. That peel-and-stick IS a pain, but for a small shed roof it's not that bad or expensive. It's the only thing that really seals around the nail holes, which is where most leaks start after a few years. A basic underlayment just can't do that, no matter how well you install it.

Spray paint beats a shouting match any day.

Well, my cheap paste is sweating now.