A tear-off strips your old shingles down to the deck before the new roof goes on. A reroof (also called an overlay or recover) puts new shingles over the old ones. For most Central Texas homes the tear-off is the safer choice, because it is the only way to see and fix the deck underneath. An overlay is possible only when one flat, sound layer is on the roof and your local code allows another. So yes, you can sometimes roof over shingles, but the conditions are narrow.
This guide shows how to tell which situation you are in, what each option costs and risks, and what to ask for in writing before you sign.
TL;DR
- A tear-off removes the old covering, lets the crew inspect and repair the deck, and then installs a new roof. An overlay adds a new covering over the existing one.
- An overlay may work only if there is a single layer, it lies flat, the deck is sound, code permits it and the structure can carry the weight.
- Tear off if you already have two layers, the roof sags, the decking is damaged or the shingles are badly distorted.
- Overlays are roughly 25% to 40% cheaper upfront but tend to last fewer years than a tear-off roof.
- Get the method, tear-off, disposal, underlayment, flashing and deck-repair rate itemized in writing, and compare at least two bids.
Table of Contents
- Reroof vs. tear-off: what the words mean
- Can you roof over shingles?
- What the code says about layers
- What you cannot see: why the deck matters
- Cost and lifespan side by side
- Resale and buyer concerns
- A decision process you can follow in one afternoon
- What to look for in a written estimate
- Insurance claims and the method you choose
- Perspective: why we lean toward tear-off
- Get a roof inspection and a free estimate
- Repair, overlay or replace: where each fits
- FAQ
- Sources
Reroof vs. tear-off: what the words mean
People use "reroof" loosely. The Asphalt Roofing Manufacturers Association (ARMA) defines reroofing as either recovering or replacing an existing roof covering. That means "reroof" covers both options in this article, which is why a contractor's quote needs to say which one it is.
Tear-off (replacement). The crew removes the existing covering, repairs any damaged substrate and installs a new covering. This is what most homeowners picture when they say "new roof."
Overlay (recover). The crew adds a new covering over the prepared existing roof. Nothing comes off first, so there is less labor and no old material to haul away.
The trade-off is simple. An overlay skips work. A tear-off does that work, and in exchange you learn what the roof is really like underneath.
Can you roof over shingles?
Sometimes. ARMA says an overlay may be possible when one layer lies flat, the deck is sound, codes permit it and the structure can bear the weight. Every one of those conditions has to be true. If any one fails, the answer is a tear-off.
Two more cautions are worth knowing before you ask a roofer to "just go over it":
- The same ARMA bulletin notes that most manufacturers do not recommend installing new shingles over existing laminated (architectural) shingles. Most roofs installed in the last couple of decades are laminated, so this rules out a lot of overlays.
- Your city decides what is legal. More on that next.
When a tear-off is required
Removal is the right call when any of these show up, according to ARMA's guidance on when to tear off shingles:
- Two layers are already on the roof.
- The roof sags along ridge or truss lines.
- The decking is damaged, soft or rotted.
- The shingles are severely uneven or distorted.
If you are not sure how many layers you have, a roofer can check at the eave edge or a rake edge, or in the attic. Do not guess from the ground.
What the code says about layers
Most building codes allow no more than two roof coverings. ARMA explains that if two layers are already present, the existing shingles will likely need removal.
If you live in San Antonio, the city's own re-roof permit application states that a maximum of two layers of roofing materials are allowed per the International Residential Code. The same form notes that exposing the ceiling or attic cavity may trigger additional insulation requirements under the energy code if existing insulation is inadequate. Other Central Texas cities and counties have their own permit offices, so ask yours before you plan an overlay.
A practical point: a second layer is allowed on paper, but it uses up your last layer. The next roof, years from now, will be a tear-off of two layers, which means more labor and more disposal at that time.
What you cannot see: why the deck matters
The biggest argument for a tear-off is not the shingles. It is the wood under them. ARMA notes that a replacement gives you the chance to inspect the roof deck and repair damage. With an overlay, the old shingles hide whatever is going on beneath them: slow leaks around a vent, a soft spot near a valley, a few rotted boards at the eave.
When a crew exposes the deck, the conditions that usually decide the repair list are:
- Soft or spongy boards that flex underfoot
- Dark staining or rot around chimneys, vents and valleys
- Gaps, splits or loose sheets
- Old nail pops and failed flashing
For a closer look at how moisture shows up in decking, see our guide to roof decking soft spots.
Before deciding, ARMA also says the inspection should check layers, deck condition, sagging across ridge or truss lines and whether attic ventilation is adequate. Ventilation matters because a new roof does not fix a hot, poorly vented attic. It just sits on top of it.
Cost and lifespan side by side
Upfront price is where an overlay looks attractive. One 2026 industry review puts overlays at about 25% to 40% cheaper upfront, because they skip removing and hauling away the old material. The same source puts overlay life at around 16 years, against 20 to 30 years for a tear-off roof.
Those are national figures, not a quote for your home. Your actual price depends on roof size, pitch, material and how much deck repair turns up.
| Overlay (recover) | Tear-off (replacement) | |
|---|---|---|
| Upfront cost | About 25% to 40% lower | Higher, includes removal and disposal |
| Typical life | Around 16 years | 20 to 30 years |
| Deck inspection and repair | Not possible | Yes |
| Layer limit | Uses up the second and last layer | Resets to one layer |
| Fits when | One flat layer, sound deck, code permits | Two layers, sagging, damaged deck, distorted shingles |
| Manufacturer stance on laminated shingles | Most do not recommend it | Standard installation |
Read the table by lifespan, not just price. If an overlay saves a quarter of the cost but buys you several fewer years, the cost per year of roof can end up about the same or worse, and you still face a tear-off of two layers at the end.
Resale and buyer concerns
A buyer's inspector looks at the roof, and a second layer over old shingles raises questions about what is hiding under it. If a roof problem surfaces during a sale, you end up negotiating repairs on the buyer's schedule. Homeowners who want to understand their position when an inspection turns up problems can read about options after a failed inspection. A fully replaced roof, with deck repairs documented, is a simpler story to tell.
A decision process you can follow in one afternoon
Use these steps to get to an answer without guessing.
- Count the layers. Ask the roofer to confirm at an edge or from the attic. Two layers means a tear-off, full stop.
- Look at the surface. Standing in the yard, check for waves, sagging lines or shingles that look curled and uneven.
- Check the attic. Look for dark stains, damp insulation, daylight through boards and signs of poor ventilation.
- Identify the shingle type. If you have laminated shingles, expect the manufacturer to discourage an overlay, which can affect warranty coverage. Ask the manufacturer or your roofer for the current written terms.
- Ask your city. Confirm layer limits and whether a permit is needed. In San Antonio, a re-roof permit application exists for exactly this.
- Compare the lifespan. Decide how long you plan to stay in the house and what you want the roof to do for that time.
- Get two or three itemized bids. Make sure each states the method.
If you want a ready-made list for step 7, our roofing estimate checklist walks through how Central Texas homeowners compare bids.
What to look for in a written estimate
A good quote leaves nothing vague. The same 2026 review recommends that a written roofing quote itemize the method, materials, tear-off, disposal, underlayment, flashing, shingles and a per-sheet deck-repair rate.
The per-sheet deck-repair rate is the line people skip. Without it, a contractor who finds rotted boards mid-job can name any price. With it, you know up front what each replaced sheet of decking costs, so the total is predictable even if the deck turns out worse than expected.
When you compare bids, make sure you are comparing the same thing:
- One bid for a tear-off and one for an overlay is not an apples-to-apples comparison.
- Check that every bid names the same shingle line or roofing material.
- Check that flashing, underlayment and ventilation are listed, not lumped under "materials."
- Confirm that disposal and cleanup are included.
For what else can inflate a final invoice, read our guide to avoiding hidden costs in a roof replacement.
Insurance claims and the method you choose
If a storm damaged your roof, the method matters even more. Your claim, your policy terms and your adjuster's scope of work all shape what gets paid for. Before you sign a contract, read the claim estimate line by line and see whether it includes removal of the existing roof, deck repair if needed, and the layers on your roof. A scope written for an overlay may not match the roof that actually needs to go on, and that gap is easier to resolve before work starts than after.
If your insurer has sent you a payout, do not assume that the amount sets the method. Ask your roofer to inspect, document what they find and explain any difference between the claim scope and the real job. Keep photos of the deck if the crew exposes it.
Perspective: why we lean toward tear-off
We see a pattern on Central Texas roofs. The homeowner who asks about an overlay is usually trying to save money, which is reasonable. But the overlay only saves money if the roof underneath is clean, and you cannot know that until it is open.
Our view is that the cheapest roof is the one you only pay for once. A tear-off lets us look at the decking, vents and flashing, fix what is wrong and install the new system on a sound base. It also gives you something to show a future buyer or inspector: a roof that was opened up and corrected, not covered.
That said, we do not push a method that does not fit. If your home has a single flat layer, a sound deck and code allows it, we will tell you so, and you can weigh the savings. We also encourage you to get more than one estimate, because we stand behind our Best Price Guarantee and want you to choose with the numbers in front of you. If your roof is damaged by a storm, we can also guide you through the insurance claim.
If you are choosing materials as well as method, our guides on impact resistant shingles and standing seam versus corrugated metal can help you plan for Texas weather.
— Dan
Get a roof inspection and a free estimate
If you are not sure whether your roof needs a tear-off or could take an overlay, we can look at it with you. Budget Roofing & Siding handles repairs, full replacements, storm damage restoration and help with insurance claims for homes across Central Texas, with free estimates and inspections.
See our roofing replacement and repair services or learn how we make insurance claims easier. You can also browse our project gallery to see finished roofs.
Repair, overlay or replace: where each fits
A tear-off is not always the first question. If damage is limited, a repair may be the better step. We cover how to decide in our guide to the 30% rule for repairing or replacing a roof. Once you decide on a full replacement, plan for the schedule too: our roof replacement timeline shows what to expect.
A quick way to sort your situation:
- Localized damage, roof otherwise sound: repair.
- One flat layer, sound deck, code allows, short-term plan: overlay is possible, ask for it in writing with the risks explained.
- Two layers, sagging, soft decking, distorted shingles or storm damage across the roof: tear-off.
- You plan to sell or stay long term: tear-off gives the cleanest result.
FAQ
Should you tear off shingles when replacing a roof?
Usually yes. Tear-off is needed for two layers, sagging, damaged decking or severely uneven shingles, per ARMA guidance. An overlay may be possible if one layer is flat and your local code allows it. It is also the only way to inspect and repair the deck.
Can you roof over shingles in Texas?
Often the answer depends on your city. San Antonio's re-roof permit form says a maximum of two layers of roofing are allowed under the IRC, so a second layer can be legal when the first is a single sound layer. Manufacturers generally advise against going over laminated shingles, so check the warranty terms first.
How much cheaper is an overlay than a tear-off?
A 2026 industry review puts the savings at about 25% to 40% upfront. The same review says overlays last around 16 years versus 20 to 30 for a tear-off, so the lower price comes with a shorter life. Ask for both options priced in writing for your house.
What should a roofing estimate include?
It should list the method, materials, tear-off, disposal, underlayment, flashing, shingles and a per-sheet deck-repair rate. That level of detail lets you compare bids fairly and avoids surprise charges once the deck is open.
Sources
- ARMA Technical Bulletin: Asphalt Shingle Reroofing, Replacement vs. Recover (2024)
- ARMA: Asphalt Shingle Reroofing, Replacement vs. Recover
- City of San Antonio: Re-Roof Permit Application
- Reroofing: Overlay vs Tear-Off, Cost & Vetting
- Failed Inspection? Your Options as a Seller