Roof Drop Per Foot

Anything less than one eighth of an inch may pool on the roof.

Roof drop per foot.

A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Most metal roofs will have minimum pitches of three in twelve but this might sometimes go down depending on whether there are special installation procedures issued by the manufacturer regarding that particular roofing material. For budget conscious homeowners metal shingles will run about 7 to 10 per square foot installed while corrugated metal sheets can be installed for 3 50 to 5 50 per square foot for materials and labor.

Adding a covered porch adds exterior space to a house and providing a. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. A roof protects a house and porch from snow and rain as well as the heat of the sun. Some building codes start at one quarter of an inch per foot or two percent.

A roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. However an ideal roof drop per foot should be at least one eighth to one quarter of an inch per foot. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio.

No you cannot install metal shingles on a low slope roof.