Low Slope Residential Metal Roofing

1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.

Low slope residential metal roofing.

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Typically low slope metal roof systems vary in weight from 40 to 135 pounds per 100 square feet making them among the lightest roofing products and the easiest to install. Low slope roofs present special challenges in terms of preventing unique types of damage. The minimum slope for lapped non soldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope.

For the smaller residential low slope roofing applications such as garage and porch transitions certainteed offers an excellent solution in our flintlastic sa self adhering sbs modified bitumen roofing system. Roof fast 95 base iko roof fast 95 base is a self adhesive product that can easily be cold applied on 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. The corrugated metal roof minimum slope is 5 degrees.

Minimum pitch for corrugated metal roof. Minimum metal roof slope depends on the roof profile building design climate and site location. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this. The membrane will outlast the shingles and seal around all nail penetrations.

Low slope metal roof systems are tested to astm e2140 standards a water penetration test evaluating the resistance of roof panels vertical seams. Structural metal panel roof systems can be used for low slope roofs because of their hydrostatic or water barrier characteristics. Low slope metal roofs require less material which reduces the overall load on the building s structure. It is important to note structural metal panel roof systems can be used for steep slope roof assemblies too.

Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems. Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs. 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. Corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch.

Flintlastic sa products feature easy and clean application and also have granulated surfaces with colors that coordinate with certainteed shingles providing the homeowner with a complete and coordinated solution for roof designs that transition from steep to low slope. Low slope and steep slope roofing systems have different industry standard testing requirements. Most structural metal panel roof systems are designed to resist the passage of water at laps and other joints as sealant or anti capillary designs can be used in the seams. The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal 25 percent slope.

For a low slope residential roof there are two main options.