Roof Length Eave Side

Pitch measurement method 1.

Roof length eave side.

On a home s exterior eaves can project stick out beyond the side of the building serving both decorative and practical functions. 8 inches and you have an 8 in 12 pitch. However there is also an architectural purpose to them. They also help to frame windows on upper stories.

As shown in the illustration the soffits are 100 perforated along the longer side and 50 perforated along the shorter side. Wind blows over the ridge and pulls heated air and moisture from the attic creating a uniform air movement that eliminates hot spots. The eaves are the edges of the roof which overhang the face of a wall and normally project beyond the side of a building. An eave is the edge of the roof that overhangs the face of a wall and normally projects beyond the side of a building.

The eave of a house has come to mean the underneath area of the roof that projects from the exterior siding as opposed to a cornice which is part of the entablature in classical architecture. That is their functional purpose. Ridge vents run along the top length of the roof. Eaves form the overhang to distribute water clear of the walls.

This is the portion of the roof that protrudes beyond the side of a house or building. In contrast a gable or rake is the overhang of a building that occurs on the side that is topped by a gable roof. Divide this number by 2 to get the square footage of the triangle. An eave is defined as the edge of the roof that overhangs the face of a wall.

Then multiply the length of the longest side by the length of this central line. The eaves form an overhang to throw water clear of the walls and may be highly decorated as part of an architectural style such as the chinese dougong bracket systems. Roof turbines have blades that spin in the wind pulling air up through the intake vents into the attic and out of the house. Do the same for the other side.

To balance the air intake at the top of a roof with asymmetrical slopes the percentage of ventilation openings along the base of the longer side should be increased and those along the base of the shorter side decreased. The basic formula for finding the area of a triangle is the base times the height in this case the distance between the base and the peak. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Once cut check to make sure the two lengths of 2x4s meet uniformly at the roof peak.

Use this measurement to cut a length of 2 4 making sure that one side of the board is miter cut to match the peak of the roof. Refer to my architectural roof types blog. If this distance measures 4 inches you have a 4 in 12 pitch.