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What does Roof Pitch Mean?

You will find the calculator on the right of your screen if on PC/Mac. If you are viewing this page via mobile then you may need to scroll towards the bottom of the page. Please take a moment to also learn how important insulation baffles can be for your home or project. Thank you!

The Best Insulation Baffle

Before using insulation, ensure proper attic ventilation. SmartBaffle attic insulation baffles create clear airspace for your attic ventilation to help prevent mold and provide proper airflow to reduce heat that builds in the attic of your home.

Understanding Roof Pitch

One of the most commonly used terms in roofing. So what does it mean?
Roof pitch (or slope) tells you how many inches the roof rises for every 12 inches in depth.

An Example of a roof pitch would be a “6/12 pitch” which means that the roof rises 6 ” for every 12″ inward towards the peak (or ridge).

There are two suggested ways to measure a roof pitch.
The first is from the top of the roof. Simply mark a level at 12″. Keeping the level balanced measure the distance from the level to the roof surface. If a roof has many layers of shingles your measurement could be slightly innaccurate using this method

The second is to measure from the bottom of the rafters. Measuring the pitch is still the process but you you can measure the roof pitch from three different locations using this preferred method. The underside of a rafter on an overhang at the bottom of the roof, the underside of a barge rafter on the gable end, and the underside of the rafter in the attic.

SmartVent is recommended for pitches that are 4/12 or higher. Now that you understand how to calculate your pitch, you will know if SmartVent attic Intake ventilation is right for your home or project. SmartVent is a patented roof and attic ventilation product that provides the best passive
attic ventilation available. Using a unique design and installation method, SmartVent eliminates the problems and inefficiencies
found in roof construction using ridge and soffit venting, namely inadequate vent openings in the soffit.

Exampl images of variouis roof pitches
Converting roof pitch to degrees is easy by using this chart below.
Degree equivalents for roof pitches
Pitch to degree conversions


SmartVent attic ventilation is virtually invisible on the roof. Click on the images below to see how your house could look.

Front of House
Back of house

SmartVent is rated at 9 nfa/ft. SmartVent also satisfies all ridge vent and exhaust vent requirements. Patent numbers 6,212,833 & 6,447,392 issued by the United States Patent & Trademark Office.

“We have been using SmartVent for years as a great solution for inadequate ventilation on our customer’s homes.  Not only does the SmartVent perform great, it installs easier than any of the competitor’s products!”

Ventilation Questions?

Do you have a question about SmartVent?
Look Through Our NEW FAQ (Frequently Asked Questions) Section By clicking on this text

SmartVent Eave

Click here for SmartVent Specifications

Most houses with ridge vents do not have the proper soffit ventilation required because attic insulation blocks the
soffit vents. SmartVent allows cooler air to enter under the shingle, through the 1″ roof slit and out the ridge
vent providing superior air flow and attic cooling.

Click here for an expanding list of SmartVent Dealers. If no dealer is located near you please give us a call at 1-800-622-4455 and we will be happy to locate a dealer for you.

What does Roof Pitch Mean?

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