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Message: [QUOTE="BillSU, post: 3479942, member: 6809"] I would not consider the roof to be a low slope. Yes typically TPO is used on low slope or flat roofs. Pitch, angle, incline, slope – they all can be used to refer to the steepness of a roof. In the roofing trade the go-to term is “pitch” and it is expressed in terms of “12 inches.” So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. If a roof increases in height by four inches for every foot of horizontal run, it is considered to have a “4-in-12 pitch” or just a “4 pitch.” Talk in terms of pitches and you will always be understood in the roofing universe. [/QUOTE]