Should I Tear Off My Old Roof or Go Over It?

What a Layover Actually Is

A layover leaves the existing shingles in place and installs the new roof directly on top. Nothing underneath is inspected, nothing damaged is replaced, and the new roof takes the shape of whatever it is lying on. Ohio code limits a structure to two layers of roofing, so a house that already has two layers cannot legally take a third and must be torn off.

Why It Is Cheaper

Roughly a third of the labour on a replacement is removing and disposing of the old roof. Skip that and you skip the tear off crew hours, the dumpster or trailer, and the landfill fees. That is a real saving and it is the honest appeal of a layover.

What You Give Up

• You never see the deck. Rotted or delaminated sheathing stays exactly where it is, under a brand new roof. This is the single biggest problem with a layover, because deck damage is common on older Central Ohio homes and it is invisible from above.
• Existing problems get sealed in. Damaged underlayment, failing flashing, and any moisture already in the assembly stay put.
• The surface is not flat. New shingles follow the contours of the old ones. Uneven or worn courses telegraph through and the roof reads as wavy.
• It runs hotter. Two layers of asphalt hold more heat, which ages the top layer faster.
• It weighs more. Two layers is a meaningful additional load on the structure.
• Shorter service life. A layover generally does not last as long as the same shingle installed on a clean deck.
• Warranty limits. Some manufacturer warranties are reduced or unavailable on a recover, and the enhanced system warranties usually require a full tear off.

When a Layover Is Genuinely Reasonable

It is not always the wrong answer. A layover can be defensible when the existing roof is a single layer, lies flat with no curling or buckling, the deck is known to be sound, there is no history of leaks, and the budget genuinely will not stretch. It is also a legitimate short term move when you know you are selling within a few years and the roof only needs to be presentable and watertight.

Even then, ask how the deck was assessed. A core sample or an attic inspection is a real answer. Looking at it from the driveway is not.

When Tear Off Is the Only Right Answer

• The house already has two layers.
• There is any history of leaking, or staining on the underside of the deck.
• Shingles are curling, buckling, or missing across areas of the roof.
• You have had storm damage, since impact damage can extend to the deck.
• You want the full manufacturer system warranty.
• You intend this to be the last roof you put on the house.

The Question That Settles It

Ask every contractor quoting you the same thing: is this price a full tear off or a recover, and how many layers are on the roof now? You will occasionally find that the cheapest quote was never comparing like for like. That single question turns three confusing numbers into a real comparison, and it belongs alongside the rest of the terms in our guide to what a roofing contract should say.

Also ask what happens if bad decking is found after tear off, and get the per sheet price agreed in advance. That is the item that generates the most mid job friction, and it is trivially easy to settle beforehand.

Our Honest Position

We tear off. The reason is not upselling, it is that we are the ones who have to stand behind the roof, and we cannot warrant a deck we never looked at. If a layover is genuinely the right call for your situation and your budget, we will tell you, and we will also tell you exactly what you are trading away. Our guide to what drives roof replacement cost in Columbus covers the other variables that move the number, and our roof replacement page explains what our scope includes.