1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.
Low slope metal roofs for homes.
Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12.
I don t see any point in sealing the roof penetrations to the sheathing.
There is only one category of metal roof systems used in low slope applications structural metal panel.
Determining which panel is the right choice for the slope on your project will depend on the manufacturer s minimum slope factor for that specific panel profile.
The membrane will outlast the shingles and seal around all nail penetrations.
Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses and smaller applications such as residential porch and garage transitions from the main home where the slope of the roof changes dramatically.
Finding the right products for your low slope roof.
Low slope metal roofs have simple geometries and are easier and less expensive to install that medium to steep slope roofs.
Tpo membranes are a polyester reinforced reflective covering made of a blend of rubber and plastic that can protect your roof from rain and the wind.
Minimum metal roof slope depends on the roof profile building design climate and site location.
Water that gets below both the roofing and underlayment will cause the same amount of problems whether it permeates the plywood or follows the pipe down.
For a low slope residential roof there are two main options.
At sheffield metals we also recognize low slope as 3 12 and below.
Structural metal panel roof systems can be used for low slope roofs because of their hydrostatic or water barrier characteristics.
Low slope metal roofs provide years of low cost low maintenance performance.
It is important to note structural metal panel roof systems can be used for steep slope roof assemblies too.
Low slope metal roofs have been a preferred roof covering for commercial institutional and industrial buildings for years because of their ability to protect against the elements to allow water to drain away from the roof surface and to keep building contents and occupants dry and comfortable.
Low slope metal roofs require less material which reduces the overall load on the building s structure.
White single ply tpo membranes are a very popular choice for mobile homes with flat or low slope roofs.
But the taller profiles like standing seam and pbr shown below can be installed on roofs with as low as 1 4 or 1 2 in 12 pitch.
Because of the shallow height of the undulating ridges of the 5v and corrugated profiles and the use of exposed metal fasteners to screw the metal to the roof deck they are limited to a slope that will shed rain quickly.
Then apply standard asphalt shingles over the membrane.
On low slope roofs like you have a water proof membrane like i ws is good insurance.
A low slope roof is defined in the industry as a roof that has a pitch equal to 3 12 or less.
