Homeowner’s insurance will step in for damage caused by natural disasters, and the roof warranty will often take care of installation errors. The other 40% to 50% of total roof replacement costs go toward materials.(Image: https://yewtu.be/k9QOFWaMBNc) An itemized list breaks down to the roofing material—shingles, shakes, tiles, etc—as well as the underlayment, new flashing, roof ridges and vents.(Image: https://yewtu.be/rQoVi_om7nc)