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HomeFactsCan You Put Shingles On A 1 12 Pitch Roof

Can You Put Shingles On A 1 12 Pitch Roof

Can You Shingle A 3/12 Pitch Roof

Building a Pitched Roof

A 3/12 pitch roof is a little steeper than a 2/12 pitch roof, so its eligible for shingles. Since its a bit steeper, it will do a better job of shedding rainwater than a 2/12 pitch roof. Remember, since it falls below the 4/12 pitch, you must use the additional layers of roofing underlayment described above for the roof to meet the building code.

Can You Shingle A 1/12 Pitch Roof

4.7/5shinglesroofread more on it

Minimum Pitch/Slope of An Asphalt Shingle RoofShingles of all types need to have a slope to function properly. The minimum requirement is 2/12. The 2/12 number is rise over run or two units of vertical for every 12 units horizontal. That works out to about nine degrees if that works better for you.

Also Know, what kind of roof do I need for a 2 12 pitch? A pitch of 2/12 is the minimum pitch for shingles made of asphalt, so your roof just barely makes the cut-off for one of the most popular roofing material options. Resilient asphalt shingles lie much flatter to the substrate than slate, tile and concrete, which keeps water from being easily blown under them.

can you put shingles on a 3/12 pitch roof?

The National Roofing Contractors Association recommends that asphalt shingles be installed only on roofs with slopes that are 3/12 and greater.

Can you put shingles on a 1/12 pitch roof?

The contractor explained that he was using ice and water shield for the entire roof before laying down the shingles. We enforce the 2012 IRC which states: Asphalt shingles shall be used only on roof slopes of two units vertical in 12 units horizontal or greater.

Can I Use Shingles On A Low Pitch Roof

Asphalt shingles are an effective roof covering material for sloped roofs that can be successfully used on slopes as low as 2:12.

What is the Minimum Slope for an Asphalt Shingle Roof. The short, simple answer is 2:12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Thereof, Can you put shingles on a 2 12 pitch?

The short, simple answer is 2:12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Asphalt shingles continue to be the most widely installed roof covering option in North America.

Also to know is, How do you install shingles on a low slope roof? Shingles that are not self-sealing must be hand-sealed with asphalt roofing cement. This low-slope application requires a double layer of #15 felt underlayment, cemented together, for a distance extending from the eaves up to a point 24 inches inside the interior wall line of the building.

Subsequently, question is, What is the lowest pitch you can put shingles on? The short, simple answer is 2:12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Asphalt shingles continue to be the most widely installed roof covering option in North America.

Also, Can you put shingles on a low pitch roof?

Recommended Reading: How To Build Gable Overhang

How To Find The Slope Of Your Roof

I created a tool that you can download and print to help you measure the pitch of your own roof.

Using the tool is simple to use. First, print it out on the standard 8.5 by 11 piece of paper.

Then fold down the bottom of the paper so the bottom 0 line is flush to the edge of the paper.

I also found it easiest to tape the paper to a book or a piece of cardboard, that way it doesnt blow in the wind when you are measuring.

To measure the slope of your roof, simply take a straight edge and rest it against the roof over the top of the peak.

Next, line up the bottom left corner of the paper to the point where the straight edge and the peak of the roof last touch. Make sure you hold the paper as straight as you can perpendicular to the top of the peak.

Then you can take the measurement of the slope. In the picture shown, the pitch of the roof is 7/12, 7:12, or 58%

If for whatever reason the slope tool I made doesnt work for you. Then another way to measure the slope would be to use two rulers. With one ruler measure out 12-inches with the second ruler measure the distance from the bottom of the shingle to the top of the first ruler.

That will also give you the pitch of the roof. In the image above the pitch of the roof would be about 3:12 or 25%.

The angles of the various pitches and percent of grade are found using this conversion chart:


What Is The Minimum Slope Consideration For An Asphalt Shingle Roof

Two shit roofs in a week! 5 layers over wood shingles ...

Posted on March 14th, 2019 Applied Roofing Services

The asphalt shingle roof is the widely used roof covering in North America. This roof is resistant to extreme weather conditions and can add great value to your home. People choose this roof over other roofing options due to its easy installation and adaptability. Asphalt roofs are available in many colors and designs. Home designs not only include angled or steeper roofs but they may include a roof with a minimum slope.

Read Also: Roofing Costs In California

Types Of Asphalt Shingles

Three-Tab Shingles The most economical and popular option, distinguished by tabs and cutouts along their long lower edge. When installed, each shingle looks like three separate pieces.

Architectural Shingles The laminated additional asphalt layer on their lower portions create a contoured, dimensional look. Asphalt sealant bonds the layers, strengthening their waterproof capacity. Although long-lasting, these shingles are not recommended for low-sloped roofs that are prone to wind-driven rain.

How Roof Pitch Determines Suitable Roofing Systems

Flat and nearly flat roofs cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow-off. For that reason, flat roofs are limited to these types of covering materials:

Built-Up Roofs

Tar and Gravel. Alternating levels of hot asphalt and heavy roofing felt finished with a gravel coating can be applied to a flat roof for protection. Typically, between three and five layers are built up. The cost for this utilitarian roof covering lies mostly in the labor and will vary greatly depending on the location of the building.

For a 2,000 square foot roof expect to pay around $3,500 for materials and supplies and upwards of $9,500 for professional labor. Built-up roofs are not a DIY project and will require professional installation but the waterproofing for flat roofs cannot be beat. A built-up roof can be expected to last 20 years.

Modified Bitumen. Historically, the word bitumen has been used interchangeably with asphalt and tar. It is a naturally occurring goo that develops from millions of years of decomposing organic material and has been used since prehistoric times as a sealant.

In modern roofing, bitumen is infused into plies of polyester or fiberglass to create a weatherproofing roof material. The installation technique is similar to building up with tar and gravel, but the plies are less expensive by half about $2,000 for materials and supplies. Labor is a bit faster and expect a tab of about $8,500.

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Minimum Slope For Low

With any roofing material, a slope of at least 1/4 inch per foot is recommended to promote drainage and minimize ponding. Where deflection from snow or other live loads is a concern, a greater slope will be needed to prevent any ponding.

Most manufacturers of low-slope roofing products specify a minimum slope of between 1/4 and 1/2 inch per foot in their warranties.

While membranes, such as vinyl or EPDM, are unaffected by standing water, it will shorten the life of asphalt based materials, such as BUR and modified bitumen.

With any roofing material, ponding of water increases the likelihood of leakage, increases deflection in the roof framing, and contributes to rooftop growth of mosses, algae, and other plant life. Also, the freezing and thawing of ponded water can harm most roof surfaces.

Can I Shingle A 3/12 Pitch Roof

How to Install Roof Shingles | Ask This Old House


. Furthermore, can you Shingle a 3/12 pitch roof?

Low Sloped Roof Shingle InstallationIf 4/12 and above is normal and 2/12 is minimum, what about properties with roofs in between the two such as a 3/12 pitched roof? You are required to have a double layer of asphalt saturated felt paper or a single layer of ice & water shield under your shingles.

can you put shingles on a low pitch roof? Asphalt shingles are an effective roof covering material for sloped roofs. They can be successfully used on slopes as low as 2:12 as well as steeper pitches.

Accordingly, what is the minimum pitch for composition shingles?

4 in 12 pitch

Can you put 3 layers of shingles on a roof?

Advantages of ReroofingMost building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4/12 pitch or less, and three layers on steeper roofs. If the structure can support the added weight, a typical 20-square reroof will cost at least $1,000 less than a tear-off job.

Also Check: How To Build An Overhang

What Is The Minimum Pitch For Composition Shingles

4 in 12 pitch

Can you put 3 layers of shingles on a roof?

Advantages of Reroofing Most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4/12 pitch or less, and three layers on steeper roofs. If the structure can support the added weight, a typical 20-square reroof will cost at least $1,000 less than a tear-off job.

Asphalt Shingles Installed On A Slope Below The Recommended Roof Pitch

Asphalt composition shingles are designed to be installed on roof slopes greater than a 4 in 12 pitch. Therefore the asphalt manufactures base their warranties around the minimum recommended pitch of 4 in 12. For those who dont understand the roof pitch number here is a way to envision it. For every 12 inches you travel on your ceiling the roof will rise 4 inches in height. Your standard 4 in 12 roof pitch works out to an incline of 18.43 degrees for those of you into geometry.

The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used. Installation on roof slopes below a 2 in 12 pitch is not recommended at all. What is the recommended installation requirements for the installation of a shingle below a 4 in 12 pitch? Well every manufacture will vary just a bit but all require the same underlayment procedure and thats what we are going to discuss.

What is the correct underlayment for the application method for roofs below the 4 in 12 pitch? You have really two choices. The first recommended choice is installing 2 layers of 15 pound asphalt saturated roofing felt with the lap seams offset from one another and all lap seams embedded in an asphalt cement. The other recommended choice is installing an ice & water membrane throughout the entire roof.

Also Check: How To Extend A Roof

Thermoplastic Polyolefin Roof Systems

TPO Roofing or Thermplastic Polyolefin Roofing is an example of a single ply or membrane roof covering currently widely used on low slope commercial buildings.

Below you’ll find more detail about TPO roofing by looking at these IO Manual. Firestone’s IO manual below also includes TPO roofing inspection advice.

On 2019-12-30 by George Wilson – example roofing sample TPO Roofing Test Cut

We are looking for lab to send samples from time to time. I teach a roofing course for industial flat roofing membranes.

This is a sample of a TPO cut test.

This Q& A were posted originally at TEST LABS – ROOF SHINGLE

On 2019-12-30 by – looking for roof test lab to send samples from time to time- TPO test cut

See LOW SLOPE ROOFING – where you’ll also find an index to our articles on low slope roof installation, inspection, repair

On 2020-01-13 by

There is no true single that will work correctly on a very low slope roof. However you might be able to nail shingles through a complete membrane of ice and water Shield or you might laminate shingles together to form a sealed surface. My view is that neither of those is as proof as a membrane type roof on that surface. Let’s both look further to see if there is presently a manufacturer offering a membrane roof that looks like shingles. If for cosmetic reasons you must install shingles on a low slope roof, you’d do it over a waterproof membrane using ice and water shield that’d seal around the many nails.

On 2020-01-13 by Joe

On 2018-12-14 by Ken

What Is The Minimum Roof Pitch For Shingles

Dollhouse Miniature Roofing Black Square Asphalt Shingles ...

Understanding how shingles work and their minimum roof pitch requirements are crucial to ensuring that a roof provides adequate protection for the living or storage area under it while also adhering to building code requirements.

While roofs with a 4/12 pitch and steeper are ideal, the minimum roof pitch for shingles is 2/12. A roof with a 2/12 pitch can safely use shingles by incorporating additional layers of underlayment around the eaves.

In this article, well examine what roof pitch is, how to calculate a roofs pitch, and what the minimum pitch requirements are for roofs with asphalt, architectural, and cedar shingles.

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Guide To Roof Pitch And Roofing Materials

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When choosing roofing materials, it may seem that you have an infinite choice of any material on the market: asphalt, composite, metal, wood shake, rubber, and MSR rolled roofing. It’s easy to imagine that the choice is purely an aesthetic or economic onethat you pick a roofing material according to what you like or what you can afford.

That’s only partly true. Other factors determine which roofing materials you can use. One solid factor is the pitch of the roof, also known as the roof slope. Roof pitch can instantly change the conversation. You may have your heart set on classic composite shingles on your roof. But if the roof pitch is below a certain ratio, you may be forced to install a different type of roofingperhaps rolled roofing or standing seam metal roofing.

Using Asphalt Shingles On A Low Slope Roof

I just bought a house with a roof section that has a 1 to 2 inch pitch, should I use rubber roofing or are shingles acceptable? -Mike


The usual slope for asphalt shingles is a 4 or greater rise for every horizontal foot of run. A 3 per foot slope is considered low, but may be acceptable if a double layer of felt is used. Some building codes allow as low as a 2 slope with asphalt shingles if additional steps are taken. For anything less than that, you should use a roofing material specifically made for low slope roofs.

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Can You Roof A House Yourself

Make no bones about itroofing is hard work. Theres no hiding from the elements. You cant be afraid of heights and you need to be pretty fit. Before committing to this how to roof a house project, try this: Get out a ladder and climb up onto your roof. If you cant walk around on it comfortably, hire a pro. If you passed this first test, go to the lumberyard or home center and throw a bundle of shingles onto your shoulder. Imagine yourself carrying that load up a laddermany, many times.

If youre still feeling positive about this how to roof a house at this point, why not give it a shot? You can skip a lot of heavy lifting by having your roofing supplier hoist the shingles onto the roof. Be sure you spread the load evenly across the length of the roofs peak. However, dont have the shingles delivered to the roof if you still have two layers of old shingles to tear offit could be too much weight for your trusses.

After youve obtained a permit and safely stripped the roof clean, nail drip edge flashing flush along the eave.

Cover the rest of the roof with No. 15 asphalt-saturated felt underlayment . Each layer overlaps the lower one by at least 2 in. Follow this step by nailing drip edge along rakes , on top of the underlayment. As you did with the flashing, always lap upper pieces over lower pieces. The felt keeps the roof deck dry before shingles go on, protects against wind-driven rain as shingles fail and increases fire resistance.

How Do You Low Pitch A Roof

How to Find the Pitch of an Existing Roof

Low-pitch roofs are usually waterproofed through the use of a roof membrane, which can be made from synthetic rubber, a thermoplastic such as PVC, or modified bitumen. Any of these materials can effectively carry water off the roof without allowing it to pool anywhere or penetrate vulnerable areas and cause damage.

Also Check: How Much Does Shingle Roof Cost

Standing Seam Metal Roof

A standing seam metal roof system is a series of metal panels that are locked together at the seams or seamed mechanically. This allows for panels to expand and contract freely when the metal panels go through thermal expansion.

A standing seam metal roof is a great roofing material for a flat roof. It has better aesthetics with more color options and is longer-lasting than the membrane roof systems.

As long as its properly installed and your attic is adequately ventilated, theres no reason you shouldnt get at least 30 years out of your standing seam metal flat roof. Under the ideal conditions, a standing seam metal flat roof could last for 50 years.

But this extra life and aesthetics comes at a higher price and is more expensive than all 3 types of roof membranes.


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