What is the minimum slope for a TPO roof?
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Furthermore, what is the minimum slope for a flat roof?
Generally, minimum slope for water to run off is 1% (1/8" per 1'). However, minimum slope for a flat roof by building code here is 2%. (1/4" per 1'). You have more than enough slope for your roof, however you will likely need some sort of membrane roofing since it is very low slope.
One may also ask, what should I use on a low slope roof? Modern low-slope roof or flat roofs tend to use a continuous membrane covering which can better resist pools of standing water. These membranes are applied as continuous sheets, bonded together with heat-welding or adhesives. A more expensive low-slope or flat roof option include sealed metal roofs using copper or tin.
Also question is, what is the minimum roof slope required for modified bitumen roofing?
Modified Bitumen Roofing requires a minimum roof pitch of 1/4:12 or greater. Thermoset and Thermoplastic Single-ply Roofing requires a minimum roof pitch of 1/4:12 or greater. Sprayed Polyurethane Foam Roofing requires a minimum roof pitch of 1/4:12 or greater.
What types of roof decking are used for low slope roofs?
5 Low-Slope Roofing Membrane Options
- Built-Up Roof (BUR): Built-up roofing membranes are composed of alternating layers of bitumen and reinforcing fabrics.
- Metal Panel Systems:
- Polymer-Modified Bitumen Sheet Membranes:
- Single-Ply Membranes:
- Spray Polyurethane Foam-Based (SPF) Systems: