If not climb the roof and measure the opening so you can cut the replacement piece to be a perfect fit.
Replace plywood and section of roof.
Additional cost for damaged sheets of plywood assuming the underlying rafters or trusses are not rotted too normally are not significantly damaged unless the plywood is literally fallin gapart generally about 40 70 sheet installed unless you have 3 4 exterior sheathing in which case more like 70 100 sheet installed.
After cleaning the debris and reframing the roof lay down a base sheathing.
The roof is arguably the most important component of your house.
Rafters run from the peak of the roof.
Gain access to the attic to inspect the plywood or roof decking.
After all it keeps water out of the building.
Eight foot 1 2 inch thick plywood is standard sheathing material.
Roof with asphalt shingles on a 2 story roof with chimney.
And while nobody likes having to pay to replace a roof the critical and aesthetic function it serves should help ease the pain of spending 8 000 to 20 000 on the work.
Average cost to have roofing replaced is about 5 250 10 500 replacing a 1 500 sq ft.
If you were able to keep the removed section in one piece measure it.
Damaged shingles and rotted plywood must be removed before replacing them with new plywood and roofing material.
Locate the rotted roof decking.
Replace the roof decking select plywood or oriented strand board that is the same thickness as the wood you are replacing.
Although the plywood typically lasts longer than most shingles and roof coverings leaks can cause them to rot.
The minimum plywood for roofing.
Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component.
Measure the opening of the section of roof to be shingled cut the plywood to size and nail to roof rafters.
Stagger the sheathing in a brick pattern for extra strength.
Rotted plywood is identifiable by sinking areas of the roof or visible leaks.