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.

How to work out the size of a roof.

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. 5 inch 5 520 square feet. Roof pitch refers to the slope which the rafter creates. For a gothic style the rafters must equal the span 60 while an elizabethan style requires the rafters to be longer than the span.

Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. If you a looking for a sleek modern style a not entirely flat roof with a pitch of 1 40 should be used. Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Then use the information below to see what size gutter you need. 6 inch 7 960 square feet. 1 roof square 100 square feet.

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. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Outside of the u s a degree angle is typically used. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Includes result for hip valley factor slope factor and the roof slope in degrees. The best roof pitch depends on the style of roof you are going for. 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. 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.

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. 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.