Steep Slope: 10/12 And Above
Any pitch that’s at least 10/12 is considered steep slope. This includes 10 over 12, 11 over 12, 12 over 12, and pitch where the rise is greater than the run.
An important note for roofing contractors: when replacing roofs with steeper pitches, it’s important to consider the safety of your crew. All roofers should be harnessed and strapped in!
What Degree Angle Is A 12 12 Pitch Roof
A 12/12 pitch roof has a pitch angle of 45°. To convert between American roofing ratios and pitch degrees, follow these steps:
What Is The Smallest Pitch Of A Roof
The smallest pitch of a roof is 0.5/12. A completely flat roof is a poor design, as water and snow will collect on it, eventually leading to your roof collapsing in from the weight of it all.
A common choice for flat roofing material is EPDM rubber, as it is highly durable, waterproof, and can be made from recycled materials. Flat roofs also tend to be cheaper and require less maintenance than traditional roofing, making them a perfect addition to your home.
You May Like: Skylight In Metal Roof
It’s Amazing The Difference The Slope Of A Roof Can Make
When deciding on buying a house. You may want to consider that a walkable roof is easier to self maintain than a steep one. DIY guys can climb up a ladder and do their own minor repairs if the roof is s low enough pitch. Having to call a roof repair expert every time a steep roof leaks can get costly.
Albany roofing contractors see the most diverse roofs. They must be well versed in flat rubber roofs all the way to the steepest slate roofs. Saratoga roofing companies are mostly used to roofing on steep pitched roofs while most Latham or Clifton Park roofing contractors are usually working on easy breezy 5 pitch roofs.
Since steep slope roofs are more difficult, it may be harder to find a roofing contractor to perform the work. Roofing contractors who only work on walkable roofs will not want to bid on steep roofs. Their crews are not experienced enough to make any money and they will have to charge higher than fair prices.
You can learn more about common roofing components, issues and terms by following these links
Useful Links For Coal Tar Pitch Roofing Information
3. General: The Pitch Drop Experiment. Check out the decades-long experiment thats still going on at Australias University of Queensland, intended to demonstrate the fluidity of pitch. You can watch the pitch in real time as it drips once every 13 years or so. This is at room temperature it gets much hotter on a roof, decreasing viscosity, and producing the self-healing quality for which pitch roofs are esteemed.
4. Historic Roofing: For a look at a coal tar pitch roofing guide from 1896, see Barretts Handbook on Roofing and Waterproofing for Architects, Engineers, and Builders Barrett Manufacturing Co. 1896.
5. Safety: Learn about health risks related to coal tar pitch exposure on the website of the National Center for Biotechnology Information. Safety precautions are important when working with this material.
Read Also: How To Install Skylight On Metal Roof
How To Determine Roof Pitch
Heres how to measure and calculate roof pitch from inside your attic.
The angle, or pitch, of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally. For example, a roof that rises 6 inches for every 12 inches of horizontal run has a 6-in-12 pitch.
Why Do You Want To Know Your Roof Pitch
There are a number of reasons you might want to find out how to work out the pitch of your homes roof. For example, you might be installing a new addition, adding more square footage to the roof. In addition, Local zoning laws may require the new roof to meet certain angles, and depending upon which roof pitch you have, certain roof products may not be weather appropriate.
As a consequence, finding out how to determine your roof pitch in can be very important.
Also Check: Where Do You Put The Screws On A Metal Roof
Visiting For The First Time
When you visit for the first time, you should take a little bit of time to view the settings on the bottom, pop-up bar. Here you can choose and consent to the cookies we use to improve both your experience and the experience of others visiting our website.
There are two types of cookies we use to do this, here’s a little information about both.
The Importance Of A Pitched Roof
If a home orbuilding’s roof didn’t have any pitch at all, it would be at a high risk ofcollecting standing water that ends up deteriorating the roof itself,presenting a serious and inevitable risk of leaking through the roof and intothe building. Even on roofs that may appear flat to the naked eye, a slightpitch has probably been built into the roof to facilitate water run-off fromrain and snow.
Pitched roofsare even more important in regions where snow can accumulate on a roof. Thelower the pitch, the greater the amount of snow that can accumulate on theroof’s surfaceand the weight of this accumulation could potentially break theinterior structure of the roof itself. With a higher roof pitch, snow and heavyrainfall can be sloughed off before structural integrity becomes a concern.
Roof pitch canalso have the following implications on a home:
Read Also: Proper Screw Placement Metal Roofing
Roof Slope Calculator Example Of Use
Measure the run length it is the horizontal distance between the roof ridge and the wall of the building. Let’s assume it is equal to 6 m.
Measure the rise of your roof. Let’s say it is equal to 1.5 m.
Calculate the rafter length, substituting these values into the following formula:
rafter² = rise² + run² = 1.5² + 6² = 2.25 + 36 = 38.25
rafter = 38.25 = 6.18 m
Calculate the roof pitch as the proportion of rise and run:
pitch = rise / run = 1.5 / 6 = 25%
Recalculate this value into an angle:
angle = arctan = arctan = 14°
Finally, you can find the roof pitch in the form of x:12.
x = pitch * 12 = 0.25 * 12 = 3
The pitch of your roof is 3:12. It can also be written down as 25% or 14°.
Three: Measure The Total Rise And Run
If you know the total height of the peak and the roofs width, you can also find the pitch with a little math. For example, if the peak is 4 feet and the total roof width is 20 feet, then the total rise is 4 feet, or 48 inches.
The total run is the distance from the peak to the edge of the roof, which in this case is the total width divided in half, which is equal to 10 feet or 120 inches.
Since the pitch is the rise over a 12-inch run, you can divide the run by 12 to get the multiplier, in this case, 120 ÷ 12 = 10.
Then, divide the rise by the multiplier to get the pitch, e.g. 48 ÷ 10 = 4.8. The pitch of this roof is 4.8:12. The calculator above can handle much of this math.
You May Like: Roof Cost California
How Pitch Affects The Cost Of Roofing
The pitch of a roof will have a definite impact on the cost to install or replace it. Steeper roofs cost more to install, so bear that in mind when choosing the right pitch for your project.
A low-slope roof might cost 10% more to install than a flat-roof, while a steep-slope roof might cost 20-30% more. Roofs with a very steep pitch might cost even more than that to install.
If youre considering a new roof, we suggest getting several estimates to learn more about the right pitch for your roof and understand the cost of installation. We also cover more about roof replacement cost in detail in our cost guide.
What Is The Average Quote For Getting A Roof Pitched
There are a lot of factors that will affect how much getting your roof pitched will cost design, style, accessibility, cost of labor etc. In the USA, you can expect to pay between $3.19-$4.43 per sq.ft. for asphalt shingles. If you choose another material, such as metal or wood, the range is $7.35-$10.73 per sq.ft.
In the UK, the price of getting a roof fitting is £72-£75 per square meter. These are only estimates though, talk to your neighbors to see what roofing costs in your area.
Read Also: Should I Replace The Screws On My Metal Roof
What Is The Minimum Slope Of A Roof
The minimum slope of a roof depends on the roofs profile. You need to consider the slope requirements of each panel to determine this minimum slope. The profile is the shape taken by the sheets when you bend them to form panels. Express the slope of a metal roof by a ratio which indicates the pitch of the roof.
This notes the rise of the roof for every foot of the horizontal run. In other words, you divide the vertical rise by the horizontal run. If youre unsure, you may want to consult with the manufacturer of the panels with the values youve acquired from the roof pitch calculator before purchasing your materials.
How To Calculate Roof Pitch As A Ratio
The traditional method of measuring roof pitch is to display it as a ratio of X:12. This is done by measuring the number of inches a roof rises vertically for every 12 inches it extends horizontally. This is simple to do, and youll need the same tools and access to your roof space as above.
Recommended Reading: Roofing Costs In California
What Roof Pitch Is 30 Degrees
A 30° roof pitch is roughly the same as a 7/12 roof pitch. To convert from degrees to the American ratio:
Roof Pitch Angles: How To Calculate Your Roof Pitch
Understanding your new roof’s pitch and slope is incredibly important. This helps you understand how excess water, snow, or debris falls off the roof, which also helps guide you to the right type of shingles or roofing materials you need. We’re here to teach you how to easily calculate and estimate your roof pitch angles manually.
Read Also: How To Repair Roof Trusses
The Old Fashioned Way
Traditional carpenters and died in the wool technophobes like to use the old fashioned way. This involves the use of three tools, a level, a metal t-square and perhaps a grease marker.
Most people, noting that it is infinitely safer like to measure in the attic of the house. You may need to move some insulation around but find a bare roof rafter. Then, using your level first place the end of the level against the bottom of the rafter. Make sure it is level, as indicated by the bubble, then move 12 inches down the level and mark it with a grease pencil.
Finally, from the 12-inch point, use your tape measure to extend to vertically, straight across till it reaches the triangular shape of the rafter sloping down. This measurement will give you the slope of the roof. For example, a roof that rises
6 inches for every foot vertically, has a slope of 6 to 12.
Low pitched roofs, particularly in warmer places like Nevada and Arizona, have a pitch of between 2 and 12 and five in 12. The lower the pitch, the more energy-efficient the building will be. And in addition, the cost of the roof construction is less.
Higher pitched roofs, those that have a pitch of 6 to 12, up to the steepest, 12 by 12, are ideal for places that get a lot of snow, ice and rain. The steeper pitch helps the ice, snow and rain drain off better, and also stops extremely heavy snow from accumulating on top of the roof and collapsing from the weight.
One: Measure From The Roof
One method to find the pitch is to climb on the roof and measure the rise for a 12 run. Youll need a level that is 12 or longer and a tape measure.
On the roof, hold the level perfectly level, and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise.
For example, if the end of a level is 4 above the roof at a point 12 away from where it meets the surface, then the pitch is 4:12.
Read Also: Tesla Solar Roof Cost Per Square Foot
Four: Measure With A Speed Square
You can also use a speed square and level to quickly measure the roofs pitch. Set the level on the edge of the speed square as shown below, then place the heel of the speed square on a rafter or gable edge of the roof.
Holding the level and speed square level, locate the measurement on the speed square where it meets the rafters bottom edge to find the angle of the roof in degrees.
How To Find The Pitch Of A Roof
There are two distinctly different methods one is more accurate, while the other is faster and easier.
The first involves climbing up on the roof, or at least the edge and actually measuring the pitch using a carpenters level and a tape measure.
The second is more of a guesstimating way to get the approximate pitch, while standing on the ground. Not as precise, the second method allows for a quick calculation when a ladder is not available, or when you need to get/provide a quick price quote, or quickly estimate roof size.
Method 1 how to figure roof pitch using level and measuring tape
For this most accurate calculation, you will need a ladder, long enough to reach the roof edge, a 2 feet level, and a measuring tape. Use caution when climbing up the ladder, and do not go onto a roof without adequate fall protection. We also recommend using a ladder stabilizer to prevent it from sliding to the sides.
Once you reach the top of the ladder, position your level so that one end touches the roof surface, while the other end is in the air, and it is leveled.
Now, measure the distance between the roof surface straight down from the levels opposite edge refer to the diagram below:
Method 2 Guesstimate roof pitch off the ground
This process is usually rather easy, fast and pretty accurate. However, if you need to order materials for a job, we still recommend getting a more accurate pitch measurement, such as in the first method.
Average Roof Replacement Cost in US:
Don’t Miss: Where Do The Screws Go On A Metal Roof
What Is The Roof Pitch
Roof pitch is simply the slope created by the rafter. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof.
Roof pitch is often expressed as a ratio between rise and run in the form of x:12. For example, a pitch of 1:12 means that for every twelve yards of building length, the rise will be equal to one yard.
We can divide roofs into the following categories:
- Flat roofs are not perfectly flat in reality they need a small slope for water runoff. Generally, these roofs have a pitch from 1/2:12 to 2:12 .
- Low pitched roofs have the pitch below 4:12 . These are generally difficult to maintain, as they require special materials to avoid leaks.
- Conventional roofs have the pitch ranging from 4:12 to 9:12 . They are the easiest ones to construct, and they are safe to walk on.
- High-pitched roofs often require additional fasteners. They have a pitch that can be as high as 21:12 .
Types Of Roof Pitches
There are two types of roof pitches: high-pitched and low-pitched.
Low-pitched roofs were most popular in the 1960s. These roofs appear to be flat, however, they tend to have a 1/12 pitch. Low-pitch roofs still have a bit of a slope to drain the water.
Commercial buildings, for example, have flat roofs but more residential structures are including flat roofs. More architects are implementing low-slope designs since green roofs are becoming more and more popular.
Most homes fall within the moderate ratio of moderate and steep . Although there might be some exceptions such as almost flat or very steep.
High-pitched roofs are often associated with Victorian-era houses. These homes have really steep roofs .
Recommended Reading: How Much Does A New Roof Cost In California