how to replalce a flat roof 

Nice job. I've been roofing for 22 yrs. And I've seen videos I really enjoy watching .

I love the videos, Eric. Keep posting. My daddy was a roofer, and growing up in Southeast Texas was spent on many roofs, holidays, weekends, and summers. It is a hell job and the definition of back-breaking labor.

For the peel and stick underlent, do you also have to nail it down? Or is the peel and stick good enough?

Hi Eric, do you recommend this product on a rooftop balcony? It will have some foot traffic