How To Work Out The Size Of A Roof

Includes result for hip valley factor slope factor and the roof slope in degrees.

How to work out the size of a roof.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. 1 roof square 100 square feet. The best roof pitch depends on the style of roof you are going for. Solar panels for households typically come in the standard dimensions of 1 70m x 1 00m that s around 1 7m2 for every panel installed however the wattage output w of the panels will likely vary between 250w and 360w for a more efficient module.

For a gothic style the rafters must equal the span 60 while an elizabethan style requires the rafters to be longer than the span. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. If a roof s various drainage areas call for different size gutters go for the biggest one k style. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. The sum of these numbers is the overall square footage of your roof which you can then use to work out how much material you ll need for your project. To do this your best bet is definitely finding a good hip roof construction calculator so that you can work it all out in a timely and simple fashion.

X research source together two 750 sq ft 70 m 2 rectangular planes and four 135 sq ft 12 5 m 2 triangular planes would give you a total area of 2 040 square feet 190 m 2. 5 inch 5 520 square feet. A 5kw solar system may produce enough energy to power your home but you may not have enough roof space for a system of that size. Roof pitch refers to the slope which the rafter creates.

Once you work through the basic triangle we will review a typical roof and how to apply some simple math to calculate how much material you will need for a roof used in our hypothetical example. 6 inch 7 960 square feet. The length l times the height h of a triangle is twice its area a2. Then use the information below to see what size gutter you need.

Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. From your average hip roof calculator to something more specific like a hip roof rafter calculator there is plenty to consider with this kind of calculation.