Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.
Roof length from edge house.
Roof pitches are described in terms of rise and run.
Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.
The attic must be ventilated to protect the roofing system against excessive heat in summer and warm moist air generated by the house in winter.
What should the minimum length of a piece of drip edge be.
Anyone standing that close to the house on the.
Roof edge or eaves edge all the boards running along the edge of the roof or eaves.
If this isn t practical then perform the same measurement on the underside of the roof.
The house base area is the area of land that the house covers and for more complex shapes can be estimated using the area calculator.
The rise is the distance from the top of a stud wall to the peak of the roof.
Drip edge vents are a two in one installation that promote water shedding at the eaves and rakes of a roof while also allowing for ventilation into the attic.
The run is the distance from the outside edge of a perimeter stud wall to the center of the house.
A furring edge is a strip of one by two wood you install on the vertical surface of the house just beneath the roof s edge.
Also known as a fascia.
A low slope roof is anywhere from 2 in 12 to 4 in 12.
A roof s pitch is determined by how much it rises for every foot it runs.
Think of how a roof extends beyond the siding and then think about how a hard rain may roll down the roof and onto the ground away from the structure.
Centuries ago the eavesdrop was that indentation line made around a structure when the rain fell off the edge of the roof onto the ground.
Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10.
The following tools estimate the area of a roof as well as the amount of materials necessary to construct a roof of a given area.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
A drip edge vent is made of a corrosive resistant material that sticks out about three inches back from the roof edge and then bends downward over them.
The space under the roof.