Roof sheathing may also be constructed of plywood.
Roof sheathing multiplier.
Find the value of 7 12 from the roof slope multiplier table which is 1 16.
This nominal square footage amount is then multiplied by a factor associated with the roof s pitch.
Multiply 20 and 40 which equals 800.
Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed.
Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet.
A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.
Nails from sheathing to ridge board roof sheathing ridge board ridge board joist or truss joist or truss roof sheathing vent holes on each side of ridge board.
Rise multiplier rise multiplier 1 to 12 1 01 6 to 12 1 12 2 to 12 1 01 8 to 12 1 20 3 to 12 1 03 12 to 12 1 42 4 to 12 1 06 15 to 12 1 60 5 to 12 1 08 18 to 12 1 80 these multipliers may also be used to convert the horizontal pro jected area to the actual roof area for sloping roofs.
If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected.
And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity.
Your roof is without a doubt one of the most important elements of your home.
Find the area of a roof.
Roof sheathing materials plywood.
A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof.
Comes in standard 4 by 8 foot sheets is strong.
To find the amount of plywood needed to cover a roof start by finding the area of the roof.
If you re in search of quotes for a roof sheathing job improvenet can put you in touch with up to four local contractors for free.
Oriented strand board osb is one of the most popular materials for roof sheathing.
Roof sheathing or decking is one of those elements.
Multiply step 1 and step 2 i e.
800 multiplied by 1 16.
Plywood is a bit more expensive but is usually.
Note holes should not remove more than half of the sheathing section note.
As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house.
Osb is lightweight cheap and strong enough to resist bending or breaking should someone be walking on the roof.
Plywood is a bit more expensive than osb but is usually stronger.
In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.
For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1.
If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps.
