Shed Roof Pitch : All Important Things To Know About It

Planning to build your shed and have some questions about the roof? So, by now you may not have figure out that framing in a woodshed is not as hard as you thought it was. At least about the floor and walls. Well worry no more, we’ll give some detailed information about how to build a shed roof pitch.

While a flat roof is relatively easy. When it comes to a sloped roof, you must understand what roof pitch is and how to calculate it. If you only used your instinct your shed pitch may lead to disaster. Follow along as we go through everything you need to know about shed roof pitch and your roof is sure to turn out just fine in the end. Don’t worry, if someone can build a shed roof, anyone can!

Stop right there before you start

Let’s get started by stating the obvious, shed roof pitch is the amount of slope your shed roof has. It is measured by the amount of rising in the roof compared to the run of the roof. Here is a simple diagram that explains this term:



type of shed roof pitch
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Is it important to have the right roof pitch? This depends in part on where you live, in part on what the weather in your area does, and in part what your tastes and building skills happen to be. You may check your local requirement too, but let’s talk about it later in this article.

Bear in mind, there is of course more work involved in building a pitched roof than in building a flat one.

You have to consider the weather in your area too to decide the right amount of pitch your shed roof is likely to need. Areas where it tends to rain or snow may need a much steeper pitch than in areas with little to no rain or snow. You didn’t want your shed’s roof full of snow loads, right?

You should also take into consideration that flat roofs hold up much better in strong winds than those with a steep pitch. One quick way to see what type of roof pitch might be best for where you live is to look at your home, your neighbors’ homes, and sheds in your local area.

Let’s Plan Your Shed Roof Pitch!

First, we are going to take a good look at the basics of roof pitch. This is one of the most important aspects of building the roof for your shed. We are also going to go over several other vital pieces of information that will prove to be invaluable in designing and building your shed roof.

Decide Type of Roof That You Want to Build

Long before you start to worry about your roof pitch, you must decide on what type of shed roof you are going to cap all of your hard work with.

If you are going to install a flat roof on your shed, you won’t have to worry about any amount of shed roof pitch as a flat roof has a pitch or 0/0, in other words, it rises zero inches for every zero inches of run.

Here are several different roof styles worth considering:

  • Gable style roof
  • Hip style roof
  • Dutch-style roof
  • Mansard style roof
  • Flat style roof
  • Regular shed roof
  • Butterfly roof
  • Gambrel roof
  • Dormer roof
  • M Shaped roof
    types of roofs
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    Each of these styles of shed roof has one or more slopes to them. This means that you must be ready to calculate both the shed roof pitch and any snow load in your area if you are going to build any of these roofs. However, you should also figure in your construction abilities as you look at the different types of roofs.

    Check Your Permit About Requirement on Particular Pitch

    Remember when you had to go to your local authority to see if you needed a building permit to build your shed in the first place? Did you stop to see if they had any rules or regulations in place regarding shed roof pitch?

    While not all local authorities have requirements regarding roof pitch, the last thing you want is to stand proudly back looking at your finished shed, only to have a building inspector tap you on the shoulder and say, “I am sorry, but your shed roof pitch is not within the standards established, or “Where is your permit? You don’t have one? Your shed roof has to be taken down.”

    It is far better to know in advance what you are facing than to build first and then find out you were in error.

    What are Low Pitch Roofs?

    low pitched roof

    Low pitched roofs are described as those with a pitch of 3/12 or less. Having such a low pitch makes walking on your roof much easier and safer.

    Low pitched roofs typically cost less to build and require much less in the way of maintenance.

    What are Mid Pitch Roofs?

    mid pitched roofs

    A medium pitched roof is one that has a pitch of between 3/12 and 7/12. This range makes up the bulk of new roofs being build on homes and outbuildings in the U.S.

    Personally, unless you live in an area of extreme snow load, We would recommend you incorporate a shed roof pitch of between 4/12 and 6/12 for optimum results.

    What are Steep Pitch Roofs?

    steep pitched roof

    Steeply pitched roofs are those with a pitch of greater than 7/12. These roofs require you to have special equipment to walk on them safely. Because these roofs shed snow/ice and rain more easily, they tend to last longer than low pitch roofs.

    Calculate Snow Loads

    Does it snow where you live? How much? In all reality, if you live anywhere that enjoys snowy winters, you must calculate the snow load your roof will be able to handle before you cut the first board. The snow load on a roof is measured in pounds per square inch, this method uses the ground snow load as its basis.

    Whenever you are building any type of commercial, residential, or storage structure in an area that receives snow in the winter, you must consider snow load when choosing the materials you plan to use for your roof and the shed roof pitch needed.

    While there is a set of exceptionally complex mathematical formulas you can use to determine the snow load in your area, this involves a lot of hard work and demands high precision.

    We recommend you use an​ online snow load calculator​ so you could have the exact measurement without worrying much. You will need to obtain certain information such as your local “ground snow load”, you can wait for winter and measure it, or better yet look it up in your local or state building codes.

    Be sure to follow the instructions very carefully with any online snow load calculator you plan to use.

    One thing to keep in mind is that one foot of fresh snow can weigh anywhere from 3 pounds per square foot up to 21 pounds per square inch, depending on whether you are dealing with light fluffy snow or heavy wet snow.

    At the same time, you should also be aware that a single inch of ice weighs in at slightly under 5 pounds, a square foot of inch of ice this thick weighs about 57 pounds.

    Shed Ventilation

    shed roof pitch ventilation

    No one can blame you for thinking that keeping the roof of your shed sealed uptight would be better during the winter months. There are a couple of very important reasons why this thought is opposite to the truth. Keep in mind that if your roof is not vented, the surface is going to stay warmer than the outside air.

    If your shed roof’s surface is warm, when you get a healthy covering of snow, the space between the surface of the roof and the snow stays above freezing. This lets the snow that is actually in contact with the roof melt, reducing your risk of ice dams building up.

    If your roof is not vented and is heavily insulated, the surface will not stay as warm. As snow hits the roof, some of it might melt, most of it won’t. That part that does melt will quickly freeze forming ice dams that trap snow on the roof, rapidly increasing the amount of snow load your shed roof must bear.

    Measure/Determine Shed Roof Pitch

    In the simplest possible terms, roof pitch is define as the amount of rising per foot of run. It is expresses as X/Y, where X = rise and Y = run, for example, 4/12 or 5/12, and so on.

    Worth noting is that the higher the first number in the equation is, the steeper the pitch of your shed roof will be. So a roof with a 5/12 pitch is steeper than one with a 4/12 pitch.

    This simple diagram will help give you a better idea of how to shed roof pitch or for that matter, any other type of roof pitch works.

    A couple of points worth noting are that the steeper you make the roof, the more it will cost to build due to an increase in the number of materials needed. But the steeper the roof is, the longer the roofing materials are likely to last.

    Shed Roof Pitch Calculators

    The best way to calculate the pitch of your new shed roof is to use an online pitch calculator such as this one​ here​ or this​ one​. The only thing you need to know to use these pitch calculators is at least two of the following: run, rise, or angle. Once you enter the appropriate information, the calculator does all of the work.

    shed roof pitch calculator
    source :

    The calculators will give you whatever piece of information you are missing. You can then use the results to help you determine the best shed roof pitch and ensure you have enough materials to build your roof.

    In Conclusion

    You probably never realized that there would be so much to determining how steep your shed roof should be. In reality, having the right shed roof pitch is vital. Not only to the structural integrity of your shed, but also its ability to withstand high winds, heavy rains, and heavy snow loads.

    One last reminder to check your local codes before getting start to build your roof, even your shed. Or you may find all of your hard work turns out to be for naught when your local inspector tells you to tear it all down.

    We hope the information we have pulled together here for you has helped you to gain a better understanding of how to build a shed roof pitch. From how to calculate the roof plan to why having the right pitch is so important to your shed.

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