Montana Roof Pitch

The state of montana requires a minimum roof snow load of 30 psf be used for design 2 this minimum value applies to the final roof snow load that is calculated after all coefficients have been applied and it may be revised when justified by a design professional to the satisfaction of the building official.

Montana roof pitch.

The montana pitch blend company continues to handcraft premium leather care products made uniquely with nature s most powerful natural preservative. On top of the 19 inch strip of underlayment felt. The most commonly used roof pitches fall in a range between 4 12 and 9 12. Snow loads shall be determined by the building official.

A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind. For example if the level is 4 above the roof at a point 12 away from where the level is touching the surface then the pitch is 4 12. Because of the many unique and powerful benefits of pine pitch montana pitch blend has been the professional s choice in premium leather care for nearly 30 years now. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.

Roofs between 2 12 to 4 12 pitch can use standard asphalt shingles but must have two layers of underlayment installed in the following manner. Apply a 19 inch strip of underlayment felt on top of the ice barrier parallel to and starting at the eaves fastened sufficiently to hold in place. 104 00 to 116 10 degrees. Note that the state of montana requires a minimum roof snow load of 30 psf be used for design.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. It is recommended that latitude and longitude be input. 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. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof.

Pursuant to montana law the minimum design roof snow load after allowed reductions shall be 30 psf. 26 gage 0 019 inches 0 5 mm corrosion resistant sheet metal and shall extend 10 inches 254 mm from the centerline each way for roofs having slopes less than 12 units vertical in 12 units horizontal 100 percent slope and 7 inches 178 mm from the centerline each way for slopes of 12 units vertical in 12 units horizontal and greater. Lower slopes don t handle wind driven rain as well. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs.

Ground snow load is highly sensitive to geographic location elevation. Roof flashing shall be not less than no. Sections of flashing shall have an end lap of not less than 4 inches 102 mm. In areas of the state outside of certified city county and town jurisdictions the design snow load shall be based on the ground snow loads developed in snow loads for structural design.

Montana ground snow load finder.