what is the average cost to redo a roof
1 If the framing supporting your roof is damaged or rotted, it may need repairing or replacing. 2  Or it might need reinforcing to hold heavier roofing materials. 3  This work could add $1,000-$10,000 or more to the roofing project, depending on what's needed. If the framing supporting your roof is damaged or rotted, it may need repairing or replacing. 2  Or it might need reinforcing to hold heavier roofing materials. 3  This work could add $1,000-$10,000 or more to the roofing project, depending on what's needed.