How to Calculate Roof Pitch in Degrees
- First, you need to measure the run of your roof.
- Next, you need to figure out the rise.
- Now, divide the rise by the run.
- Then, divide 1 by your tangent.
- Finally, multiply this result by 180/π and you’ve calculated your roof pitch!
Contents
- 1 What roof pitch is 22.5 degrees?
- 2 What degree angle is a 4/12 pitch roof?
- 3 What is a normal roof pitch angle?
- 4 What is the angle of a 7 pitch roof?
How do you figure out the angle of a roof?
Determining Roof Pitch 
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.
What roof pitch is 22.5 degrees?
A 6 in 12 slope = 26.5651 degrees, and 4.97056 in 12 slope = 22.5 degrees.
What degree angle is a 4/12 pitch roof?
What angle is a 4 over 12 pitch? – Roofs with a pitch of 4/12 are approximately 18.4 degrees, depending on how exact you’d like to be in your measurement. Check out our roof angle chart for more examples of the exact angles (expressed in degrees) of common roof pitches.
What is a normal roof pitch angle?
Quick Guide To Roof Pitches
You’ve got roof pitch questions, we’ve got answers.Whether you’re just interested in knowing more about the importance of your roofing materials or you’re trying to gather more info on how to raise a roof pitch or roof slope, this is the article for you.What is roof pitch?
There are many different types of roofs out there, such as flat roofs, the pitched roof, the built-up roof, the gable roof, and so on and all have a different roof pitch. Plainly put, the roof pitch is how steep a roof is. Standard roof pitch varies among geographic locations, climatic conditions, etc., so there’s no one-size-fits-all roof.
- How to read roof pitches You’ll probably see something like a 4/12 roof pitch.
- This means that the roof rises 4 inches for every 12 inches it runs.
- The roof pitch is not to be confused with the pitch angle.
- Unless you’re incredibly talented at math, you’ll have to do a bit of calculating to get the pitch angle.
What is roof pitch angle? So, the 4/12 roof pitch angle is about 18.4°. A 3/12 roof pitch angle is about 14°, so on and so forth.4/12 is quite typical. Anything under 3/12 is a low pitch roof. Anything above 6/12 is a steep roof pitch since it becomes harder to walk on the roof. It’s pretty easy, to be honest. Get a level and some measurement tape. Mark 12 inches on the level. Place one end of the level against the roof, then raise it until the bubble in the level is, well, level. Then, with your tape measure, tape directly from the 12-inch mark down onto your roof. That will tell you the #/12 roof pitch. Benefits of low vs. steep roofs Advantages of a low pitch roof:
Easier to walk on. This one is a given. If you want to use your roof for other purposes, such as a garden or bar area, it would be best to have the pitch angle as low as possible. You can’t enjoy the city view sitting on a steep angle!
Improved heating and cooling. Normal or steeply pitched roofs create extra space in the structure. This space, of course, fills with air. Air is susceptible to relatively quick heating and cooling when exposed to external temperatures and will affect the temperature below the roof (re: where you and other people are most likely to be.) A low or no pitched roof eliminates that dead space, removing that space’s impact on the temperature below it. Lower installation costs, Low slope or flat roofs need less material to build, as you won’t need large trusses. This reduces labor costs (for you or hired workers) in handling and installing these trusses. Also, rolling out, covering, sealing roof material is faster than installing individual shingles.
The disadvantage of a low roof:
Exacerbated weathering. Water and ice will sit on a flat roof more so than a pitched roof. This means that water has more opportunity to seep into cracks and crevices or attract pests. However, because the roof is flat, it will be easier to climb up and fix roof issues, so at least there’s that.
Advantages of steep roof:
More space. The area under the steep roof can be converted into an attic, used for storage or even living purposes. It’s a good way to increase the value of your home or to simply get the most out of your property’s space. Let snow load. If you live in an area with heavy snow, a steep roof discourages snow from accumulating. Low or average roof pitches allow the snow to get heavier on the home, causing structural damage after successive snow seasons. On a steep roof, however, snow will slide right off. Dryer roof. As with snow, water will slide right off too. This will keep the roof drier overall and discourage spontaneous roof leakages.
Disadvantages of a steep roof:
As mentioned previously, a steep roof is harder to walk on, making repairs more difficult.
Changing roof pitch Low roof pitches have their advantages—most people have average or steeply pitched roofs for a reason. If you already know you have low pitch roof, you might want to increase the roof pitch. But how should you go about doing it? Just note, changing roof pitch requires good carpentry skills and ample roofing knowledge.
- While we can’t supply the former, we can give you the latter (pun intended).
- How to pitch a flat roof The pitch of a flat roof is between 1-3/12.
- Whether you’re doing it for homerenovating purposes or repair concerns, here’s a quick guide on how to raise the roof (not the dancing kind).
- To increase that, get some rigid foam insulation.
Strip your existing roof down to the wood covering. Install the rigid foam panels, ensuring various tapers and thicknesses. Create a single slope from one end to another using the rigid foam panels. Then align more panels, extending the original slope across the roof.
Use mechanical fasteners or adhesive to fasten the tapered panels to the roof. Depending on local building codes, apply vapor or thermal barriers. You can use ethylene propylene diene monomer rubber, polyvinyl chloride, thermoplastic olefin, etc. to cover the tapered roof. If you have anything like chimneys or vent pipes, install metal flashings around the protrusions to prevent leakages.
That’s a quicker way to increase roof pitch. Other methods include removing roof coverings, rafters, and trusses and installing completely new ones. That may work better depending on your situation. If you want to discuss other low roof pitch options, you can contact a local professional roofer.
- How much pitch should a gutter have? Once you’ve re-pitched your roof, the next thing to concern yourself with is the gutters.
- Efficient gutters have a pitch that allows rainwater to drain away from the roof and home.
- This is essential for preventing floods and leaks, avoiding the harm of nearby landscapes, and protecting your home’s foundation.
Don’t take gutters lightly. Most roofers will set the slope at 1 quarter inch per 10 feet of guttering. So, if you have 30 feet of guttering, your downspout should be 0.75 inches lower than the other end (0.25 x 3 = 0.75). Simple enough, right? Roof pitches matter Not many homeowners think about their roof pitch often (heck, not many people even know it exists), but understanding and maximizing your roof’s pitch increases your home’s longevity and lowers the amount of time you’ll have to see a roofer.
What roof slope is 25 degrees?
Table 2: Slopes in Degrees Converted to Standard Roof Pitch – If you’re not sure what the slope of your roof is and you want to determine that in either degrees or rise-in-run, we recommend this slope finder on Amazon, It’s very inexpensive and very accurate. If you’re using this table, you may want to look into getting yourself a construction calculator. This one is very good,
| Convert Roof Slope from Degrees to Standard Roof Pitch | |
|---|---|
| Roof Angle in Degrees | Roof Slope as Rise in Run (X in 12) |
| 1° | 0.209 in 12 |
| 2° | 0.419 in 12 |
| 3° | 0.629 in 12 |
| 4° | 0.839 in 12 |
| 5° | 1.050 in 12 |
| 6° | 1.261 in 12 |
| 7° | 1.473 in 12 |
| 8° | 1.687 in 12 |
| 9° | 1.901 in 12 |
| 10° | 2.116 in 12 |
| 11° | 2.333 in 12 |
| 12° | 2.551 in 12 |
| 13° | 2.770 in 12 |
| 14° | 2.991 in 12 |
| 15° | 3.215 in 12 |
| 16° | 3.441 in 12 |
| 17° | 3.669 in 12 |
| 18° | 3.899 in 12 |
| 19° | 4.132 in 12 |
| 20° | 4.368 in 12 |
| 21° | 4.606 in 12 |
| 22° | 4.848 in 12 |
| 23° | 5.094 in 12 |
| 24° | 5.343 in 12 |
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What is a 45 degree roof?
Why Roof Pitch Is an Important Part of Every Roofing System There are so many roofing options on the market that it’s easy to assume one could choose any roofing material, and it would look great. But the truth is, there is one factor that plays an important part in every roofing system, including choice of material. Here’s a closer look at an essential aspect of roofing: roof pitch. What Is Roof Pitch? Roof pitch is the roof slope’s angle represented as a fraction, sometimes as a ratio. A common roof pitch used for residential roofing is 4/12 or 4:12. The number 4 represents 4 inches of vertical “rise” while the number 12 represents the horizontal “run”.
Therefore, a roof with a 4/12 pitch is read as 4 inches of rise for every foot of run. Pitched roofs can be as steep as 12/12, which puts it at a 45-degree angle. You can find out what your roof’s pitch is by climbing into the attic and finding a beam that’s perpendicular to the roof edge. Mark a 12-inch section anywhere near the roof edge for easy reach.
Measure the vertical distance between one point to the rafter directly above it, and then do the same for the other point. The difference between the two distances is your roof’s rise per foot. Roof Pitch and Choosing the Right Roof Material Technically speaking, all systems are pitched.
- In fact, even so-called “flat” roofs are slightly pitched, with the rise ranging from half an inch to two inches to allow rainwater to drain into the gutters.
- The steeper the pitch, the more efficient the roof is at shedding rainwater.
- However, the bigger the property, the more impractical a single pitched roof is and the costlier it would be to repair and maintain.
It would also require extremely large gutter troughs that would be too costly to build. Roof pitch also dictates the roofing material that can be installed on a roof. On a new building, the choice is easier as one can design the framing structure to suit the material.
- On the other hand, when a homeowner intends to switch to another type of roofing, the pitch is the first consideration.
- Shingle roofing like asphalt shingle and slate are suitable for steeply pitched roofs since gravity prevents rainwater from moving back up and under the roof.
- It can’t be swapped with single-ply roofing used on flat roofs as neither would be as effective.
Pritchett Bros is your leading provider of roofing and. Give us a call at, or fill out our, We serve customers in Bloomington, IN, and surrounding areas. : Why Roof Pitch Is an Important Part of Every Roofing System
What is a 22 degree slope?
Slopes vs. gradients vs. % grades –
| Slope | |||
|---|---|---|---|
| Angle (degrees) | Gradient | Grade (%) | |
| Y | X | ||
| 0.1 | 1 | 573.0 | 0.17 |
| 0.2 | 1 | 286.5 | 0.35 |
| 0.3 | 1 | 191.0 | 0.52 |
| 0.4 | 1 | 143.2 | 0.70 |
| 0.5 | 1 | 114.6 | 0.87 |
| 0.57 | 1 | 100 | 1 |
| 0.6 | 1 | 95.49 | 1.05 |
| 0.7 | 1 | 81.85 | 1.22 |
| 0.8 | 1 | 71.62 | 1.40 |
| 0.9 | 1 | 63.66 | 1.57 |
| 1 | 1 | 57.29 | 1.75 |
| 2 | 1 | 28.64 | 3.49 |
| 3 | 1 | 19.08 | 5.24 |
| 4 | 1 | 14.30 | 6.99 |
| 5 | 1 | 11.43 | 8.75 |
| 5.71 | 1 | 10 | 10 |
| 6 | 1 | 9.514 | 10.5 |
| 7 | 1 | 8.144 | 12.3 |
| 8 | 1 | 7.115 | 14.1 |
| 9 | 1 | 6.314 | 15.8 |
| 10 | 1 | 5.671 | 17.6 |
| 11 | 1 | 5.145 | 19.4 |
| 12 | 1 | 4.705 | 21.3 |
| 13 | 1 | 4.331 | 23.1 |
| 14 | 1 | 4.011 | 24.9 |
| 15 | 1 | 3.732 | 26.8 |
| 16 | 1 | 3.487 | 28.7 |
| 17 | 1 | 3.271 | 30.6 |
| 18 | 1 | 3.078 | 32.5 |
| 19 | 1 | 2.904 | 34.4 |
| 20 | 1 | 2.747 | 36.4 |
| 21 | 1 | 2.605 | 38.4 |
| 22 | 1 | 2.475 | 40.4 |
| 23 | 1 | 2.356 | 42.4 |
| 24 | 1 | 2.246 | 44.5 |
| 25 | 1 | 2.145 | 46.6 |
| 26 | 1 | 2.050 | 48.8 |
| 27 | 1 | 1.963 | 51.0 |
| 28 | 1 | 1.881 | 53.2 |
| 29 | 1 | 1.804 | 55.4 |
| 30 | 1 | 1.732 | 57.7 |
| 31 | 1 | 1.664 | 60.1 |
| 32 | 1 | 1.600 | 62.5 |
| 33 | 1 | 1.540 | 64.9 |
| 34 | 1 | 1.483 | 67.5 |
| 35 | 1 | 1.428 | 70.0 |
| 36 | 1 | 1.376 | 72.7 |
| 37 | 1 | 1.327 | 75.4 |
| 38 | 1 | 1.280 | 78.1 |
| 39 | 1 | 1.235 | 81.0 |
| 40 | 1 | 1.192 | 83.9 |
| 41 | 1 | 1.150 | 86.9 |
| 42 | 1 | 1.111 | 90.0 |
| 43 | 1 | 1.072 | 93.3 |
| 44 | 1 | 1.036 | 96.6 |
| 45 | 1 | 1.000 | 100.0 |
| 46 | 1 | 0.9657 | 103.6 |
| 47 | 1 | 0.9325 | 107.2 |
| 48 | 1 | 0.9004 | 111.1 |
| 49 | 1 | 0.8693 | 115.0 |
| 50 | 1 | 0.8391 | 119.2 |
| 51 | 1 | 0.8098 | 123.5 |
| 52 | 1 | 0.7813 | 128.0 |
| 53 | 1 | 0.7536 | 132.7 |
| 54 | 1 | 0.7265 | 137.6 |
| 55 | 1 | 0.7002 | 142.8 |
| 56 | 1 | 0.6745 | 148.3 |
| 57 | 1 | 0.6494 | 154.0 |
| 58 | 1 | 0.6249 | 160.0 |
| 59 | 1 | 0.6009 | 166.4 |
| 60 | 1 | 0.5774 | 173.2 |
| 61 | 1 | 0.5543 | 180.4 |
| 62 | 1 | 0.5317 | 188.1 |
| 63 | 1 | 0.5095 | 196.3 |
| 64 | 1 | 0.4877 | 205.0 |
| 65 | 1 | 0.4663 | 214.5 |
| 66 | 1 | 0.4452 | 224.6 |
| 67 | 1 | 0.4245 | 235.6 |
| 68 | 1 | 0.4040 | 247.5 |
| 69 | 1 | 0.3839 | 260.5 |
| 70 | 1 | 0.3640 | 274.7 |
| 71 | 1 | 0.3443 | 290.4 |
| 72 | 1 | 0.3249 | 307.8 |
| 73 | 1 | 0.3057 | 327.1 |
| 74 | 1 | 0.2867 | 348.7 |
| 75 | 1 | 0.2679 | 373.2 |
| 76 | 1 | 0.2493 | 401.1 |
| 77 | 1 | 0.2309 | 433.1 |
| 78 | 1 | 0.2126 | 470.5 |
| 79 | 1 | 0.1944 | 514.5 |
| 80 | 1 | 0.1763 | 567.1 |
| 81 | 1 | 0.1584 | 631.4 |
| 82 | 1 | 0.1405 | 711.5 |
| 83 | 1 | 0.1228 | 814.4 |
| 84 | 1 | 0.1051 | 951.4 |
| 85 | 1 | 0.08749 | 1143 |
| 86 | 1 | 0.06993 | 1430 |
| 87 | 1 | 0.05241 | 1908 |
| 88 | 1 | 0.03492 | 2864 |
| 89 | 1 | 0.01746 | 5729 |
| 90 | 1 | 0.00000 | ∞ |
ul> 1% grade = 0.57 degrees = 1 cm per 100 cm = 1 inch per 100 inches = 0.125 inch per foot
What is a 5/12 pitched roof?
ROOF PITCH – 
The pitch, or steepness, of a roof is often referred to in terms of the amount of vertical rise over a 12″ horizontal run. For example, a 5:12 pitch roof will rise vertically 5″ for every 12″ it goes back horizontally. There are smartphone apps available which can be used to “sight” a roof’s pitch from the ground.
- The pitch of a roof plays a role in determining what roofing materials are appropriate, what sort of ventilation options exist, and the cost of labor to repair or replace the roof.
- Additionally, roof pitch can impact the positioning of gutters at the bottom edge of the roof, so that water is properly collected and carried away.
Low Pitch Any roofs up to 3:12 are generally considered “low slope.” In the residential arena, we see lower slope roofs as part of the home’s architectural design. We also sometimes see low slope roofs on just certain areas of a home such as porches. Another common area for these roofs is on manufactured homes.
When it comes to metal, only mechanically seamed standing seam roofs should be used on pitches lower than 2:12. With this style of metal roof, the seams between the panels are actually crimped shut to be watertight. For roofs of 2:12 or greater pitch, products like our ClickLock standing seam work very well.
Then, when you get into roofs of 3:12 or greater pitch, most other metal roofs can be used and that generally is the pitch requirement for asphalt shingles as well. Walkable Pitch Of course, when it comes to the pitch, or steepness, of your roof, one person’s idea of “walkable” may be another person’s idea of “there’s no way I am getting up there!” And, generally, we encourage folks to do things to their roofs and anything on their roof (dormers, chimneys, skylights, pipes, etc.) that will never require them to climb up there! But, as a general rule, contractors will approach working on roofs greater than 6:12 pitch a little different than lower slope roofs, and their approach goes to a different level at 8:12 as well.
As the roofs get steeper, additional safety equipment may be needed and additional time is required for roof work. This all affects cost. One benefit of metal roofing is that it maintains its walkability even as it ages. For walkable roofs, many of the more heavily profiled metal roofs such as shake and shingle profiles, will have optional strengthening foam backers to assist walking on the roof.
These can be used on the entire roof or just in traffic areas such as around chimneys, dormers, etc. High Pitch We often seen metal roofs, and other more decorative roofs, being used on homes with steeply pitched roofs. On these homes, the aesthetics of the roof play a big role.
- The roof becomes such a significant part of the home’s visual exterior that property owners seek out roofing products that have extra design features and beauty.
- Another thing to keep in mind on high pitch roofs is that labor for roof work can be very costly.
- With a shortage of skilled trades, that cost is going up rapidly.
So, a durable roof that will end the need for future repair or replacement can be a very wise choice and a good way for property owners to protect themselves from exorbitant roof costs in the future. Multi-Pitch Some homes are designed with multiple roof pitches.
- This may include transitions on the roof from one pitch to another or it can involve varying roof pitches meeting at valleys or hips on the roof.
- These all can be tricky areas, necessitating forethought and skill on the part of the roofing technicians.
- For example, it can dramatically impact hip treatment when the courses of shingles adjoining at the hips do not “match up” due to the varying pitches.
If your home has multiple roof pitches, be certain to discuss with your contractor exactly how those areas will be handled.
What is the top angle of a 6 12 pitch roof?
The angle on a 6/12 roof is 26.57 degrees.
What is the minimum slope angle for a roof?
What is the most appropriate angle for Flat Roofing? – Normally, 1:80 (0.72⁰) is the recommended minimum angle for a slope, and this is universal across the vast majority of flat roofing systems, regardless of the materials that they incorporate. In order to achieve this drop, a slightly steeper angle of 1:40 (1.44⁰) should be the aim when installing a flat roof, as this accounts for surface deviations and material deflection among other things.
What is the lowest angle for a roof?
Defining low pitch – In the UK, traditional roof pitches measure between 30° and 50°, while low-pitch roofs are defined as less than 30°. Traditionally, a minimum pitch of 20° was recommended, modern roofing products have made it possible to create equally performing roofs with angles as low as 12.5°. Anything less than 12.5° is considered a flat roof.
What is a good slope for a roof?
Minimum Slope for a Pitched Roof – Now that we’ve gone over the various slopes found in most residential roofs in Colorado, let’s answer the question: “What is the minimum slope of a pitched roof?” While it is possible to use standard asphalt shingles on a low-slope roof, the minimum recommended slope prescribed by most roofing material manufacturers is 2/12,
- Some manufacturers even suggest 4/12 as a minimum, just to be safe.
- Any slope lower than 2/12 will often require the use of roofing materials like single-ply membranes or built-up roofing (BUR) membranes.
- But, why is this? Why is 2/12 the minimum slope for a pitched roof? The short answer is gravity,
When a roof isn’t pitched steep enough, asphalt shingles don’t do as good of a job at protecting the building. Shingles require slope to function properly, and without it, there’s a much higher chance that rainwater and snowmelt will move laterally underneath the shingles, which is a recipe for leaks!
Is a 6 12 roof pitch 45 degrees?
What is A 6/12 Roof Pitch? – When you are talking about roof pitches, the first number is the number of inches the roof rises every 12 inches. The angle on a 6/12 roof is 26.57 degrees. Think about this when you are talking about the steepness of a roof. A roof with a 3/12 pitch has a much lower slope than a roof with an 8/12 pitch.
What is the angle of a 7 12 pitch roof?
For tile, shingle, slate and metal roofing – Roof Pitch is a term used in the roofing industry to describe the angle (slope) of a roofing structure. Most commonly, a roof pitch will be from 0 (flat) to 12 (45°). The pitch of a roof is determined by 2 numbers: the rise and the length.
| Roof Pitch (slope) | Roof Angle (degrees) | Slope Factor (multiplier) | Valley and Hip Factor (multiplier) |
|---|---|---|---|
| 1:12 pitch | 4.76° | 1.0035 | 1.4167 |
| 2:12 pitch | 9.46° | 1.0138 | 1.4240 |
| 3:12 pitch | 14.04° | 1.0308 | 1.4362 |
| 4:12 pitch | 18.43° | 1.0541 | 1.4530 |
| 5:12 pitch | 22.62° | 1.0833 | 1.4743 |
| 6:12 pitch | 26.57° | 1.1180 | 1.5000 |
| 7:12 pitch | 30.26° | 1.1577 | 1.5298 |
| 8:12 pitch | 33.69° | 1.2019 | 1.5635 |
| 9:12 pitch | 36.87° | 1.25 | 1.6008 |
| 10:12 pitch | 39.81° | 1.3017 | 1.6415 |
| 11:12 pitch | 42.51° | 1.3566 | 1.6853 |
| 12:12 pitch | 45° | 1.4142 | 1.7320 |
Riverside has all the accessories necessary for installation of standing seam, wall and flat lock roof panels. We have clips in stainless steel, copper and regular steel as well as nails, screws, sealants, fasteners and tools. : Roof pitch angle and slope factor chart
What is the angle of a 7 pitch roof?
7 on 12 roof pitch – The 7/12 or 7 on 12 roof pitch are most common types of residential roof pitch which are a sloping surfaces with an angle of usually 30.26° degrees steepness of a roof with it’s vertical rise of 7 inches over its 12″ or 1 foot horizontal distance or run in building construction. These are most protective and efficient solution in wet and cold weathers. 
7 on 12 roof pitch The 7/12 roof pitch is the most common residential roof pitch. it is step enough to shed water quickly and also being non comfortable for walkable.7/12 roof pitch express in fraction, percentage, ratio or in angle. Roof pitch, or slope, is a measure of vertical rise to horizontal distance or run expressed in inches per foot.
