Missouri Minimum Roof Pitch

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.

Missouri minimum roof pitch.

Metal roof shingles require a minimum roof pitch of 3 12 or greater. The tools required will be a contractor s level at least 24 inches long and a tape measure. Asphalt shingles continue to be the most widely installed roof covering option in north america. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

However you can only use this pitch with built up roofing or specialized synthetic roofing. Slate and slate type shingles require a minimum roof pitch of 4 12 or greater. High pitched roofs often need extra fasteners and their pitch can be as high as 21 12. Most roof s have a pitch in the 4 12 to 9 12 range.

Minimum roof pitch for shingles. If not you will need to make your measurement from on top of the roof itself or at the edge of the roof with a ladder. Mineral surfaced roll roofing requires a minimum roof pitch of 1 12 or greater. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 200 for slate roofs.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. They have a pitch ranging from 4 12 to 9 12. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof. 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. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Clay and concrete tile requires a minimum roof pitch of 2 1 2 12 or greater.

For a gothic style the rafters must equal the span 60 while an elizabethan style requires the rafters to be longer than the span. Measuring a roof pitch. What is the minimum slope for an asphalt shingle roof. Conventional roofs are the easiest to construct and you can walk on them safely.

You can also calculate roof pitch even without using a roof slope calculator. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run.