Minimum Roof Pitch For Loft

The chief reason for having a roof pitch is to redirect water and snow away from the roof and avoid any percolation that might result from stagnation of water on the roof.

Minimum roof pitch for loft.

A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. But of course there is a proviso here. That s at each wall. There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12.

The profile is the shape taken by the sheets when you bend them to form panels. If instead we use a shed roof the roof peak 4 will be at one wall the height in the center will be. The minimum roof pitch is also subject to the standards set forth by the various building codes used in the respective regions. At least not according to the building regulations.

Express the slope of a metal roof by a ratio which indicates the pitch of the roof. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. However you can only use this pitch with built up roofing or specialized synthetic roofing. Let s assume that our loft is 8 wide and the peak of the roof is 4 above the loft.

Importance of a roof pitch. Asphalt shingles continue to be the most widely installed roof covering option in north america. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Roof pitch is the measurement of roof steepness.

The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. You could also opt for a pvc flat roofing membrane. You need to consider the slope requirements of each panel to determine this minimum slope. Many of the questions we receive from readers concern headroom or rather the lack of it in their current roof space and how this will effect their plans to convert the loft.

So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12. So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. The way pitch also known as roof slope is measured is rise over run. Let s also assume we chose a 4 12 pitch 18 4.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The minimum slope of a roof depends on the roof s profile. With a gable roof the roof height at the walls will be 16 below the peak or 2 8.