How Much Of Drop Should Patio Roof With Plastic

Roof pitch in layman s language simply refers to the steepness of the roof.

How much of drop should patio roof with plastic.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. Anything less than one eighth of an inch may pool on the roof. Some building codes start at one quarter of an inch per foot or two percent. Anything with a slope of some kind will cause water to run off the roof.

Plastic patio pergola awning covers polygal roof panels clear patio covers for pergolas multiwall polycarbonate sheets often referred to by the brand name of polygal are a structured sheet product available in double and triple layered configurations and manufactured in various colors and degrees of transparency. Fasten aluminum ridge roll flashing to each panel as you proceed. Nail trim limber to all corners and to front and back where panels meet roof. Install vent as close to roof peak as possible.

Determine the amount of slope needed for the size of the paver patio. Measure the calculated amount of slope down from the string tied to the stake at the drainage end of. I know the standard is to have 1 4 drop per foot but have you ever been on a patio with a steeper grade and it still get relatively flat. Lower than the purlin along the house 12 x 1 4 3.

A 16 foot patio will need 2 inches of slope. For example a 12 foot patio will need 1 inches of slope. However you can only use this pitch with built up roofing or specialized synthetic roofing. The slope should be at least 1 inch for each 8 feet of patio.

However an ideal roof drop per foot should be at least one eighth to one quarter of an inch per foot. To provide drainage the panels should slope toward the outside edge of the deck about 1 4 in. 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. One contractor said 1 1 4 1 1 2 inch we wouldn t notice but i find that really hard to believe and gave me question as to his integrity.

Plan to space the 2x4 purlins parallel to the house and 3 ft. Some additional considerations for this project.