Pitching A Flat Roof

How to make a flat roof have a pitch general steps step 1.

Pitching a flat roof. Step 1 calculate the roof span. Tommy explains how to seal a flat roof. However flat roofs require much more aggressive and consistent maintenance than a pitched roof. Roof pitch in layman s language simply refers to the steepness of the roof.

Calculate how much the roof span is going to be by measuring from one top plate to the other top plate. There is no question that a flat roof is cheaper to install. Step 2 calculate material prices. Tear off the old materials and apply roof sheathing.

A pitched roof is more expensive. For a gothic style the rafters must equal the span 60 while an elizabethan style requires the rafters to be longer than the span. Flat roof slope the slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches. Adding pitch to a flat roof.

Thisoldhouse asktoh subscribe to this old house. Determine the roof span and pitch. An example for a steep sloped roof is 8 12. The pitch of a roof is arrived at by dividing the vertical rise and its horizontal span or what people in the roofing industry would refer to as the slope.

This means that the rise of the slope goes up or down 8 inches for every 12 inches. There are different kinds of roofs and all these have particular specifications for their installation. Install the new material. Flat roofs which aren t perfectly flat require a small slope to allow for water runoff.

Then he and kevin install a rubber protected roof over an addition. These roofs have a pitch less than 4 12. The best roof pitch depends on the style of roof you are going for. Step 3 prepare the materials.

Step 4 re sheath roof. A far more common method is to use firring strips which are battens cut at an angle and placed on top of the roof joists. Another possibility is to cut a fall into the roof insulation something several businesses now offer it s often referred to as tapered insulation. It is a significant renovation if you are converting from flat to pitched.

Step 5 replace roofing. Flat roofs also don t last as long.