You want a roof area calculator that provides accurate estimates to help you order materials such as shingles membrane roofing or ceramic tile.
Is roof area just the total area of the building.
Next multiply the area by your roof s pitch.
1 200 x 1 05 1 260 square feet to allow for hips ridges and waste add 10 of your final number for a gable roof and 17 of your final number for a cottage roof.
If you ve got a two story house with a total square footage of 2 700 square feet with each floor.
Ra a x c.
A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.
How to calculate the roof area using the building square footage the pitch of the roof.
But as ff says if in doubt ask the insurer.
Determine how many square feet of roof area a building has by measuring from the ground.
If the building is not a nice neat square it gets mote complex but i m sure a decent mathematician could help out.
So for our example the half roof area is as follows.
8 7m x 6 98m 60 73m.
The roof slope height is 6 98m.
Determine how many square feet of roof area a building has by measuring blueprints or plans.
The roof area ra is calculated easily.
Your total number would be either 1 386 or 1 474 square feet.
We multiply the roof length c which is the sum of building length plus the gable end overhangs of the roof by the roof width of slope a that we just figured out above when we computed the hypotenuse of the roof triangle that s why we needed the roof rise number.
Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
The length of the roof is 8 7m for this square house as 8 7m x 8 7m is 76m total floor space.
The building area definition only states that areas of the building not provided with surrounding walls shall be included in the building area if they are included within the horizontal projection of the roof or floor above a roof overhang that constitutes an eave would not be included in building area.
Calculating the surface area of a sloped roof can be time consuming without the right tools.
This roof pitch chart will give you your multiplier.
Measure the total area of the roof north south x east west.
Then do the same for just the flat part.
To accurately calculate the area of your roof you must first determine its slope or pitch.
Start the project with a roof area calculator.
Or just enter your numbers into this roof pitch degrees.