Minimum Functional Angle For Roof Shingles

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.

Minimum functional angle for roof shingles.

Asphalt shingles continue to be the most widely installed roof covering option in north america. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. Due to increased fire hazard wood shingles and organic based asphalt shingles have become less common than fiberglass based asphalt shingles. When shingling a shed roof with three tab shingles the standard asphalt covered tar backed shingles used on most residential roofs you will come to a point at which the top row must be finished with another type of shingle i e ridge cap shingles.

They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. No shingles are water tight so the minimum recommended roof pitch is 4 12 without additional underlayment materials. There are also 29 standard sized shingles.

This project guide is a combination of those two articles and it covers replacing the existing roof decking installing underlayment and ice dam protection laying the first row laying shingles in the field flashing ridge shingles and vents and more. 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. Or the colon can replace the slash as in 2 12 or 7 12. What precautions need to be taken to install shingles on low slopes.

As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. Shingles of all types need to have a slope to function properly. Low slope for shingles. Roof pitch defined and explained.

A couple of weeks ago we published a two part series showing how a local roofing contractor shingled a roof with architectural shingles. What is the minimum pitch slope of an asphalt shingle roof. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. A roof slope of 2 12 up to but not including 4 12 is considered as low in residential construction.

Roof pitch designations are comprised of two numbers indicating a ratio. However shingles are packaged in a way that they are light enough for the average person to carry around. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The minimum requirement is 2 12.

Roof shingles of fitzroya came to be used as money and called real de alerce. Finding the right products for your low slope roof. For low slopes as well as any other slope your local building department should be contacted. Pitch is the term used to describe the angle slope or slant of your roof.

A shed roof is one that has a single sloping side.