Input length width and desired r value of the area to be insulated.
Calculating attic volume.
This will give you a visual representation of the dimensions of your attic for reference.
Calculate or enter the square footage of the attic or area to be vented.
Let s use the following simple ranch house for an example.
Click the button to calculate the depth in inches and pounds of total insulation required for this job.
For example if you have a cross gabled house with two wings split the attic into two parts where one wing joins the other.
Cubic feet is a unit of volume.
With a tape measure and some simple mathematical formulas you can easily calculate your attic s square footage.
How to calculate cubic feet.
Once you have those measurements you apply some multiplication as follows.
To calculate the volume or capacity of an item or space in cubic feet you will first need to measure its length width and height in either feet inches or a combo of both centimeters meters or yards.
Here s a rule of thumb to follow.
Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.
Generally as the roof pitch increases the volume inside the attic also increases along with the amount of needed attic ventilation.
If the space includes irregular shapes such as triangles mark these off so.
This calculator will help you estimate hip roof parameters including rafters and roof area person outline anton schedule 2011 08 29 17 53 20 one of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area.
Calculate the two halves of the attic separately then add the spaces together.
Calculating ventilation area of attic kitchen ventilation text.
Up to 6 12 roof pitch use the standard formula as explained in this article.
Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.
For more complex attic spaces draw a sketch of your space and divide the space into parts before performing the calculations.
Ok to determine how much ventilation area you need for your house all you need to know is the square foot area of the attic to be ventilated.
The house measures 30 feet by 50 feet.
Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.
Step 1 create a rough sketch of your attic on a piece of paper.