Minimum Shed Roof Slope

A 4 12 pitch being 4 inches of vertical rise over one foot or 12 inches of horizontal run.

Minimum shed roof slope.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Simply put pitch is expressed as rise over run just as the grade is simply this fraction expressed as a percentage. For slopes below 20 degrees systems such as epdm fibreglass metal roofing can be used. Match roof material and use appropriate slope match the roofing on the covered porch with the main roof.

Determine the minimum slope of the roof based on the roofing material. Minimum pitch for corrugated metal roof corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch. A quarter inch slope is the lowest you would go with a metal roof experts recommend at least a half inch minimum to ensure a weatherproof interior for your shed. For lots more information on which roof finish to use for which slope and indicative costs.

There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch. Remember metal roofing is more expensive than shingles. In roofing it is expressed in inches of vertical rise over inches of horizontal run. Felt shingle systems can achieve lower slopes down to about 20 degrees.

Visit the shed roofing page. The corrugated metal roof minimum slope is 5 degrees.