What Does a Roof Warranty Actually Cover on an Ohio Home?

The Two Warranties

• Manufacturer warranty covers defects in the shingles themselves. This is what the impressive number on the brochure refers to.
• Workmanship warranty comes from your contractor and covers the roof being installed incorrectly.

A shingle that fails on its own is rare. Flashing installed wrong, nails driven high or overdriven, valleys handled poorly, ventilation left unbalanced: these are common, and none of them are manufacturer defects. When a roof leaks three winters in, the manufacturer warranty is almost never the answer.

What Those Big Numbers Actually Mean

Lifetime coverage on a shingle package is not what most people picture. Read for these three things.

• The non prorated period. Full value coverage usually applies for a limited initial window. After that, coverage declines with age, so a claim in year twenty returns a fraction of the replacement cost.
• Materials only, or materials plus labour. Basic warranties frequently cover the shingles and not the cost of removing the failed roof and installing the new one, which is most of the money.
• Transferability. Many warranties transfer once, within a limited window, sometimes with a fee and paperwork. This matters when you sell.

Enhanced System Warranties

Manufacturers offer stronger coverage when the whole system is theirs and a certified contractor installs it, meaning the shingles, underlayment, starter, ridge, and ventilation all come from the same brand. These typically cover labour as well as material, run non prorated for longer, and sometimes cover the contractor’s workmanship through the manufacturer for an initial period, which is genuinely valuable because it survives the contractor going out of business.

They come with conditions: an approved installer, approved components throughout, a full tear off in most cases, and registration after completion. We are an Owens Corning Preferred contractor, and our Owens Corning roofing page explains what that certification allows.

The Workmanship Warranty Is Only as Good as the Company

A twenty five year workmanship warranty from a company that has been trading for eight months is a number on paper. A ten year warranty from a business that has been in your area for years and answers the phone is worth considerably more. Weigh the company before you weigh the term, and ask what the warranty actually covers, what the process is for making a claim under it, and whether it transfers to a buyer.

Ask for it in writing on their letterhead. A verbal assurance of a lifetime workmanship guarantee is not a warranty, and this is one of the terms our guide to what a roofing contract should say covers.

What Voids Roof Coverage

• Inadequate ventilation. Manufacturers require it, and an attic that cooks the shingles from underneath is grounds to decline a claim.
• Pressure washing. It strips granules and is explicitly excluded by most manufacturers.
• Later penetrations done by someone else, such as satellite mounts, solar racking, or a new bath fan vent flashed badly.
• Repairs by an unapproved contractor, which can end an enhanced system warranty.
• Never registering it. Enhanced warranties require registration within a set window after completion. Miss it and you have the basic one.

What to Collect and Keep

• The manufacturer warranty certificate, registered in your name, with the registration number.
• The workmanship warranty on the contractor’s letterhead, with a term and a scope.
• The final invoice and the permit approval.
• Photographs of the completed work, including flashing and ventilation.
• Records of any later work anyone does on the roof.

Put all of it in one folder. When you sell, that folder is worth real money, as our article on replacing a roof before selling explains, and it is the difference between a documented asset and an unknown.