How To Figure Square Footage Of Roof For Slate

As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house.

How to figure square footage of roof for slate.

Calculate each plane separately. The calculator cannot account for complex shapes based on a measurement of square footage alone. Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100. Ft and deduct 20 sq.

For instance if the roof is 1550 square feet then it is 16 squares. Deduct one half of the area of chimneys and dormers if over 20 sq. Per square smaller roofing slates actually weigh more than larger slates and come in at around 800lbs square while larger slates 12 24 weigh about 700lbs square. Convert the area to roofing squares.

Measure your house at ground level then add in the roof s overhang for greater accuracy. Multiply the length and width of each square or rectangle shaped plane. Although roofing projects are estimated and sold by the square roofing material is often not sold in 1 square increments. To find the squares divide the overall roof area by 100 and then round up.

How to calculate square feet of a roof. Include dormers the small outjuttings over attic windows. The answer is the number of roofing squares for the roof. Roof pitches in degrees.

The top ridge will be shorter than the one of the gable roof but the four hips will add. Again for the sake of this article let s say this is 10 linear metres. How to estimate roofing materials. Measure the length and width of every roof plane or surface.

It depends on the size of the slate. If you measured in another unit of measure do the following to convert to feet. If you measured in feet skip to calculate the area as square footage. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area.

Calculate the square footage area of a hip roof. Include areas of dormer roofs sides of dormers if slated slate saddles or any other places where slate is used in addition to the main roof area. Less than actual area if more than 80 sq. If you measured in feet inches divide inches by 12 and add that to your feet measure to get total feet.

A square simply refers to a 10 x 10 square of roofing. Convert all of your measurements to feet. We now know that face 1 of the roof is x x y which is 40 metres squared 40m2. This nominal square footage amount is then multiplied by a factor associated with the roof s pitch.

As there are 2 sides to a standard up and over roof you can simply multiply each side by two therefore 40m2 x 2 80m2. The square footage of a hip roof area is identical to the square footage of a gable roof of the same size. On average slate measured at approximately 1 4 inch thick weighs between 700 and 800 pounds per square.