Multiply the two dimensions to get the area. The calculation will give you 320 square feet.
The weight of concrete roof tiles can vary, but on average, they weigh between 9 to 12 pounds per square foot. Therefore, 100 square feet of concrete roof tiles would weigh approximately 900 to 1,200 pounds. It's important to check the specific weight of the tiles being used for a more accurate calculation.
Surface area of the roof times depth of snow gives volume of snow. Take a sample of snow and weight it to determine density (since the density of snow can vary quite a bit). Density times volume equals weight.
To calculate the roof surface area needed to fill a 30,000-gallon tank with one inch of rainfall, you will need to know the collection efficiency of your roof. A common value is around 90%. With that efficiency, you would need a roof surface area of approximately 6,667 square feet to collect enough water to fill the tank from a one-inch rainfall.
If you paint one square metre of roof white you will save 107.5 kilograms of greenhouse gas equivalent over a twenty year period. If you paint your whole (1000 square feet : 93 square metres) roof white, you will save 10 tonnes of greenhouse gas equivalent over the twenty year lifetime of your paint. Source: California Energy Commission (2005). See the Cool Roof calculator link below.
To determine how many 20 x 10 slates are needed to cover a roof measuring 7 meters by 3 meters, first convert the dimensions of the slates to meters: 20 cm x 10 cm equals 0.2 m x 0.1 m, which has an area of 0.02 square meters. The roof area is 7 m x 3 m, totaling 21 square meters. Dividing the roof area by the area of one slate (21 / 0.02) gives 1,050 slates needed to cover the roof.
96 square feet. Multiply length by width - the result is the area in square feet.
Multiply the two dimensions to get the area. The calculation will give you 1,008 square feet.
The length times the breadth in feet.
99.7
One bundle of shingle covers about 33 square feet of roof hence around 850 bundles of shingles will be needed for 28000 square feet roof!
what is the cost of a roof per square foot
To determine how many rolls of underlayment are needed for a 1500 square foot roof, you first need to find out how much area one roll covers. If a roll has 144 feet, and assuming it covers 3 feet wide (a common width for underlayment), it would cover 432 square feet (144 feet x 3 feet). Dividing the total roof area (1500 square feet) by the coverage per roll (432 square feet) gives approximately 3.47. Therefore, you would need 4 rolls of underlayment to cover the roof.
9 per foot. 9 times 24=216
Generally there is 1/3 of 1 square per bundle but this varies with style and manufacturer. a square covers 100 square feet of roof so 1 bundle would be roughly 33 square feet.
384 square feet - without using a calculator !
If you mean square feet, there are 100 square feet in a square. So 20 squares is 2000 square feet.
Six 'squares' will do it and leave a few spare.