Minimum Functional Angle For Roof Shingles

Asphalt shingles continue to be the most widely installed roof covering option in north america.

Minimum functional angle for roof shingles.

For low slopes as well as any other slope your local building department should be contacted. 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. Due to increased fire hazard wood shingles and organic based asphalt shingles have become less common than fiberglass based asphalt shingles. No shingles are water tight so the minimum recommended roof pitch is 4 12 without additional underlayment materials.

A roof slope of 2 12 up to but not including 4 12 is considered as low in residential construction. Shingles of all types need to have a slope to function properly. Low slope for shingles. The minimum requirement is 2 12.

Finding the right products for your low slope roof. What precautions need to be taken to install shingles on low slopes. A couple of weeks ago we published a two part series showing how a local roofing contractor shingled a roof with architectural shingles. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

Or the colon can replace the slash as in 2 12 or 7 12. What is the minimum pitch slope of an asphalt shingle roof. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. Roof shingles of fitzroya came to be used as money and called real de alerce.

A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

A shed roof is one that has a single sloping side. 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. Pitch is the term used to describe the angle slope or slant of your roof. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

Roof pitch designations are comprised of two numbers indicating a ratio. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Residential low slope roofing can generally be divided up into two broad categories. However shingles are packaged in a way that they are light enough for the average person to carry around.

There are also 29 standard sized shingles.