Roof - Sheathing

Not Reviewed
Equation / Last modified by KurtHeckman on 2017/01/20 17:34
Rating
ID
KurtHeckman.Roof - Sheathing
UUID
cca540a2-fac5-11e2-968f-bc764e049c3d

The Sheathing for a Roof calculator computes the number of 4x8 sheets (32 ft² each) RoofSheathing-illustration.pngneeded to cover the area of a roof (both sides of a gabled roof) based on the length and width of the area covered and the pitch. 

INSTRUCTIONS: Choose your preferred units and enter the following:

  • (W) Width of area covered by roof.
  • (L) Length of area covered by roof.
  • (P) Pitch of the roof (choose one)

4x8s:  The calculator returns the number of 4x8 sheets needed to cover the roofs surface.

General Information

This formula is only accurate if the both gables have the same pitch, which puts the ridge in the middle.  Unless the roofing area is very close to being perfectly divisible by 32 feet squared (the area of a 4x8), and additional sheet is added to the count to provide the correct number of sheets needed to be purchased allowing for the fractional part.

For roofs with different pitches, calculate each side ( roof -  area (one side) ) separately.

See Also:
  • To compute the number of bundles of shingles needed for a roof, CLICK HERE.
  • To compute the number of trusses needed for a roof, CLICK HERE.
  • To compute the pitch of a roof, CLICK HERE.
  • To compute the length of rafter boards, CLICK HERE.