How Many Cents Does My Roof Need

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.

How many cents does my roof need.

Contractors use a formula to determine how many times air enters a room in a hour through the hvac system measured in cubic feet per minute multiplied by 60 to translate it to cubic feet per hour. If replacing an old roof is delayed however it could result in bigger problems down the road. Tear offs require many unseen parts like underlayments and starter strips. The table below is a guide that can be applied to most common roof types and pitches.

A new 3 250 square foot roof can range from 6 500 to more than 20 000. You need a sunny roof to benefit from solar panels but yours may be sunnier than you think. As a general rule your roof needs 1 square foot of vent area for every 150 square feet of attic space. To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares.

Do i need a new roof. So watch for the warning signs to be sure to. Sometimes a roof can naturally reach the end of its useful life without experiencing a roof failure. This overhand measurement will need to be added to the measurement of the building.

For example if your roof structure has a ventilated area of 150 m 2 and you wish to use the lomanco bib12 unit you would need three units for an efficient and balanced ventilation system. There are also gable and roof fans which actively pull the hot air out of the attic. At this point you will also need to estimate or measure the overhang if you have one. Once you have these measurements you will need to calculate the area of the roof and then you can see how many shingles you will need.

Thus if your attic is 450 square feet you need roof vents equaling 3 square feet. Google s project sunroof gives building by building details and now has data for parts of all 50. Here s what goes into a contractor s quote.