Small Shingle Roof Repair: A Homeowner's DIY Guide (Up to 1 Bundle / 33 Sq Ft)

Read this before you do anything

This guide covers small asphalt shingle repairs — the kind a careful homeowner can handle safely. Specifically:

Up to 33 square feet of damage (one bundle of shingles covers approximately 33 sq ft)
Roof pitch of 6:12 or less (a relatively gentle slope)
Single-story home (or accessible from a ground ladder)
Damage that doesn't involve flashing, valleys, chimneys, skylights, or penetrations
No structural damage to the deck, no rot, no sagging
You're physically able to work on a roof safely

If any of the above is not true for your situation, stop reading this article and contact a contractor. Roofing is one of the most dangerous trades in residential construction, and the cost of a serious fall vastly exceeds the cost of professional repair.

If your damage is from a storm, also read our storm damage guide first — you may have an insurance claim worth significantly more than a DIY repair.

What you can DIY vs. when to call a pro

Before you climb a ladder, honestly evaluate the scope:

DIY territory

A few isolated missing or torn shingles from a wind event
One or two cracked shingles in the open field of the roof
Replacing a damaged section smaller than one bundle (33 sq ft)
Re-securing a tab that's lifted but not torn
Re-sealing the edge of a shingle whose adhesive failed
The damaged area is on a gentle slope you can stand on without sliding
You can reach the work area safely from a ladder or by walking on the lower roof

Call a pro — no DIY

Anything involving flashing (around chimneys, walls, skylights, vents) — flashing repair is the most leak-critical work on a roof and the most commonly botched DIY task
Valley repairs — water moves fast through valleys and improper repair causes immediate leaks
Pipe boot or vent flashing — looks simple, often isn't
Ridge cap replacement — wind-vulnerable, exposed to highest loads
Damage on a steep pitch (7:12 or steeper)
Any work on a multi-story home where the ladder reaches above 10–12 feet
Storm damage that may be covered by insurance — see our storm damage and insurance guides
Any sign of deck damage — soft spots, visible rot, sagging
Multiple damaged areas scattered across the roof (this usually means broader failure, not isolated repair)
A roof over 15 years old with widespread granule loss, curling, or brittleness
If you can't safely access the work area

The honest contractor answer

If you find damage beyond what's clearly within DIY scope, the cost of professional repair is usually less than the cost of a serious fall or a botched repair that fails next storm. A roofing contractor can typically repair a small section in under an hour for a few hundred dollars. The math rarely favors DIY for anything bigger than a clearly isolated, clearly accessible issue.

For background on how shingle roofs are constructed and the components involved, see our guide to how a residential shingle roof works.

Safety first (this section is not optional)

According to the U.S. Occupational Safety and Health Administration (OSHA), professional roofers working 6 feet or more above a lower level are required to use fall protection — guardrails, safety nets, or personal fall arrest systems. The Bureau of Labor Statistics consistently ranks roofing among the most dangerous occupations in the U.S., with falls being the leading cause of serious injury and death.

Homeowners aren't subject to OSHA, but the physics don't change. A fall from a single-story residential roof can cause serious injury or death. Take this seriously.

Before you go up

Check the weather. Never work on a wet, icy, or windy roof. Don't work when storms are forecast within 4 hours.
Wait for cool weather. Asphalt shingles are pliable and easier to work with in cool temperatures (50–70°F is ideal). Hot shingles tear easily and can burn through gloves. Cold shingles crack when lifted.
Tell someone what you're doing. Have a person on the ground who knows you're on the roof and can call for help.
Wear non-slip work shoes with soft rubber soles. Athletic shoes with worn tread or boots with hard soles are not appropriate.
Use a stable ladder. Extension ladder rated for your weight + 20% margin, set at the 4:1 angle (1 foot out from the wall for every 4 feet of height), feet on solid level ground, top extending 3 feet above the roof edge for safe transition.
Use a roof harness if your roof is steeper than 4:12 OR you're working more than 10 feet from the ground. A residential roofer harness with anchor and rope costs around $80–150 and is a meaningful safety investment.
Never work alone on a roof. Always have a helper at minimum stabilizing the ladder.

Signs to stop and come down

Surface feels slippery or you feel unsteady
Weather changes — wind picks up, rain starts, temperature drops
Shingles feel brittle and crack when you lift them (you're working on a roof too old or too cold for DIY)
You discover damage beyond what's described above
Anything feels wrong

A trip to the emergency room, even a non-fatal fall, costs significantly more than hiring a contractor.

Tools and materials you'll need

Tools

Flat pry bar (sometimes called a flat bar or shingle removal tool)
Hammer
Utility knife with new blades
Caulking gun (for tube-format roof cement)
Tape measure
Pencil or marker
Sturdy ladder (rated for your weight + load)
Work gloves
Safety glasses
Knee pads (recommended)
Bucket or roof bag for debris

Materials

Replacement shingles — same brand, model, and color as your existing roof if possible. Many homeowners have leftover bundles in the garage from the original install; if not, take a damaged shingle to a roofing supply store for color matching. Big-box store shingles may not exactly match your existing roof.
Roofing nails — galvanized steel, stainless steel, aluminum, or copper, minimum 12-gauge shank with 3/8-inch diameter head. Length must penetrate at least 3/4 inch into the roof deck. Per Ohio Residential Code R905.2.5, shingles require minimum 4 nails per strip.
Asphalt roofing cement — quart can or tube format. Used for sealing nail heads and re-bonding shingles.
Loose granules (optional) — collect them from your gutters or downspouts to dust over fresh roof cement and blend the repair

What you don't need

You don't need to remove all the shingles back to the deck for a small repair. You don't need new underlayment unless it's visibly damaged. You don't need to re-flash anything for an open-field shingle repair. If your situation actually requires any of those things, you're outside DIY scope.

Step-by-step: replacing a single damaged shingle

The repair process is the same whether you're replacing one shingle or several. Repeat the process for each shingle if you have multiple to replace.

Step 1: Inspect the surrounding area

Before starting, walk around the damaged shingle and check:

The shingles immediately above and below — any signs of damage?
The shingles to either side — same?
The roof deck visible through the gap (if any) — solid, or soft/rotten?
The underlayment — intact, or torn?

If the surrounding shingles are also damaged, brittle, or showing significant granule loss, you may be looking at end-of-life roof failure rather than isolated repair. If the deck looks soft or you can see signs of moisture damage, stop and call a contractor. The repair is no longer a DIY task.

Step 2: Break the seal bond on the damaged shingle

Modern asphalt shingles have a factory-applied adhesive strip on the underside that bonds each shingle to the one below it. You'll need to break this bond on:

The damaged shingle itself
The shingles in the course above the damaged shingle (which seal down onto the damaged one)
Sometimes the shingles two courses above, if their nails fall on the row above your target

Slide the flat pry bar gently under the shingle directly above the damaged one. Lift slowly to break the seal. Don't yank — granule surfaces tear easily.

Step 3: Remove the nails

Each shingle is typically secured with 4 nails. To find them:

Lift the shingle above the damaged one to expose the top of the damaged shingle
The nails will be visible along the nailing strip (typically about 5–5/8 inch up from the bottom of the exposed portion)

Use the pry bar to lift each nail straight up. Slide the bar under the shingle and right against the nail shank, then lift. The nail should come up through the shingle without tearing it (more importantly, without tearing the shingle above it).

Most shingles also have nails from the row above. Once you've broken the seal on the shingle above, you'll see nails through that shingle that anchor it AND penetrate the top of the damaged shingle. You need to lift those nails too — usually 4 of them in the row above.

In total, you're typically removing 8 nails to free a single damaged shingle.

Step 4: Slide the damaged shingle out

Once all nails are out, the damaged shingle should slide straight down and out. If it resists, stop and check — there may be additional nails you missed, or the shingle may be bonded somewhere you didn't break. Don't force it. Forcing tears adjacent shingles and creates additional damage.

Step 5: Inspect what's underneath

With the shingle removed, inspect:

The underlayment — is it intact and dry? If torn or wet, you have a larger problem than a single shingle.
The deck — is the wood solid? If you can push a screwdriver into it, the deck has rotted and this is no longer a DIY repair.

If anything looks wrong underneath, stop and call a contractor.

Step 6: Slide in the new shingle

Slide the new shingle into the gap from below, sliding it up under the shingle above. Align it with:

The shingles to the left and right (the exposure should match — typically 5 inches for standard 3-tab shingles, similar for architectural shingles)
The course line of the surrounding shingles (the bottom edge should align with adjacent shingles)

The new shingle should sit flush and look continuous with the surrounding roof. If it's lifted, slanted, or doesn't seat properly, you may have shingles bonded that you didn't release. Don't force it — back up and check.

Step 7: Nail it down

Drive 4 new roofing nails through the nailing strip on the new shingle. The nailing strip is usually marked on the shingle itself with a horizontal line or arrows. Critical points:

Nails must be driven flush with the shingle surface — not under-driven (the head sticks up and prevents the shingle above from sealing) and not overdriven (the head cuts into the shingle and reduces holding power)
Nails should not penetrate the top exposed portion of the shingle below
Per Ohio code, minimum 4 nails per shingle, penetrating at least 3/4 inch into the deck
Do not reuse old nail holes — drive into fresh deck

Step 8: Re-nail the shingle above

Remember those 4 nails you removed from the shingle above? They need to go back in. Either reuse the original holes if they're solid, or drive new nails into fresh deck slightly offset from the original holes.

Step 9: Re-seal the bonds

The factory adhesive strip won't immediately re-bond after being broken — it needs sun heat to reactivate, which takes days to weeks and may never fully re-seal. To ensure wind resistance, manually seal the repair:

Apply 3 small dabs (about quarter-sized each) of asphalt roofing cement under the tabs of the new shingle, evenly spaced along its length
Apply 3 small dabs under the tabs of the shingle above (which you lifted)
Press down firmly with your hand for 10–15 seconds

The cement bonds the shingle to the course below, restoring the wind-resistance seal.

Step 10: Seal the nail heads (optional but recommended)

For an extra layer of leak protection, dab a small amount of roof cement over each nail head. Don't apply large amounts — a thin smear covering the head is sufficient.

Step 11: Blend the repair (optional, cosmetic)

If you collected loose granules from your gutters before starting, sprinkle them lightly over any fresh roof cement that's visible. The granules adhere to the wet cement and help the repair blend with the surrounding shingle color.

Repairing a cracked or torn shingle (without removing it)

If the shingle is cracked but still in place and you can't get matching replacement material, an in-place repair is acceptable as a temporary or permanent fix for minor cracks:

Apply a thick bead of roofing cement directly into the crack
Press the shingle down firmly, working the cement into the gap
Apply a second bead of cement on top of the crack
Use a putty knife to spread the top layer smoothly
Sprinkle loose granules over the wet cement to blend the appearance

This works for cracks under 6 inches in length on otherwise sound shingles. For larger cracks or splits, replace the shingle.

Re-bonding a lifted tab

If the adhesive seal under a shingle tab has failed and the tab is lifted but not torn:

Lift the tab gently
Apply 2–3 dabs of roofing cement underneath, near the bottom edge
Press the tab down firmly for 15–20 seconds

This is one of the simplest repairs and addresses a common wind-damage scenario.

What to do with the debris

The old damaged shingles and any debris go in a regular trash bag. Asphalt shingles are not classified as hazardous waste in Ohio and can go out with regular curbside trash in most jurisdictions (check local rules for very large quantities). Don't burn them — asphalt produces toxic smoke.

Use a magnetic sweeper or carefully walk the yard around the work area to pick up any roofing nails that fell during the repair. A single nail in a tire is an expensive afternoon.

After the repair

Check the work area in the days and weeks after the repair:

First rain — walk the attic during or right after the next rain. Look for any moisture, dripping, or new stains in the area below the repair.
First few days — visually inspect the repair from the ground. Make sure shingles are seated, no lifting visible.
First windy day — confirm the repair held against wind. If the new shingle lifts, the seal didn't take — add more roofing cement.
Two weeks — the factory adhesive on the new shingle should have activated in summer heat. In cool weather, the seal may not fully bond until the next warm period.

If anything looks wrong, don't wait — call a contractor for assessment. A failed repair becomes a leak, which becomes interior damage, which becomes a much larger expense.

When the "small repair" turns out to be bigger

Sometimes you climb up to fix one shingle and discover the actual problem is larger than expected. Common scenarios:

You break the seal on adjacent shingles and they crumble or tear. This means the roof is past serviceable life and brittle. Stop. Call a contractor. The repair will keep cascading.
The deck below the damaged shingle is soft or rotten. This is a structural issue requiring sheathing replacement. Not a DIY task.
The underlayment is torn over a large area. You'll need to remove more shingles to address it properly. At this point you're doing a partial reroof, not a repair.
You find multiple damaged areas you didn't see from the ground. Patterns of damage usually indicate a broader event (hail, wind storm) that may qualify for an insurance claim — see our storm damage guide.
The damage exceeds 33 sq ft (1 bundle). At this scope, the labor of doing it correctly approaches the cost of professional partial replacement, without the warranty.

Climbing back down and calling a contractor is the right answer in all of these cases. You've already invested some time and figured out what you actually have. A contractor can take it from there with the right tools, training, and insurance.

Permit considerations

Most small repairs don't require a permit in Ohio jurisdictions. Permits are typically required for:

Replacing more than a certain square footage (varies by jurisdiction, often 100–200 sq ft)
Any work involving structural members
Tear-off and replacement of any significant area
Anything affecting flashing at penetrations

A single-shingle repair or a 1-bundle repair generally doesn't trigger permit requirements. If unsure, call your local building department before starting — they're usually helpful and confirming takes a 2-minute phone call.

For more on Ohio code requirements and local permits, see our Ohio code reference guide.

Cost comparison: DIY vs. professional

For one bundle of damage (33 sq ft) at typical Ohio prices:

DIY:

1 bundle of matching shingles: $35–$50
Roofing nails (1 lb box): $5
Roof cement (quart): $10
Tools you may already own (pry bar, hammer): $0–$30 if buying
Time investment: 2–4 hours for a beginner, plus learning curve
Total materials: ~$50–$100

Professional repair:

Service call + labor for small repair: $250–$600 in central Ohio depending on access, pitch, and complexity
Time investment: typically completed in under 2 hours by a professional
Includes: professional assessment of surrounding shingles, proper tools, insurance coverage if anything goes wrong

The cost difference for a truly small isolated repair makes DIY reasonable for the right situation. But factor in:

Risk of injury — even a non-fatal fall can cost $10,000+ in medical expenses
Risk of botched repair — a leak that develops in 6 months can cause interior damage many times the cost of the original professional repair
Risk of voiding warranty — most shingle manufacturer warranties exclude failures caused by improper repair
Risk of insurance complications — if your roof is later damaged in a storm, an insurance adjuster who sees an obvious amateur repair may question other claim items

For genuinely small, accessible, clearly-isolated repairs, DIY makes sense. For anything else, the math usually favors a professional.

Final word

The single most common mistake homeowners make with DIY roof repair isn't a technique error — it's misjudging the scope before starting. Damage that looks like "one shingle" from the ground often turns out to be more once you're up there. Damage that's actually larger than a single shingle often signals broader issues with the roof.

If you climb up and find anything that doesn't match what's described in this guide, come back down. Call a contractor. The repair will be done right, you stay safe, and any insurance claim you may have remains protected.

For most homeowners, the right use of this guide is:

Read it before climbing the ladder to understand whether your situation is truly DIY-scope
Use it as a reference for small isolated repairs
Recognize when to stop and call a professional

A roof is a system that protects your largest investment. Treating small repairs with the same care a contractor would is what keeps that system working for its full service life.

This article is informational and reflects best practices at time of publication. Roofing work involves real safety risks. The author is not liable for any injury or damage resulting from DIY roofing work. Always consult a licensed Ohio roofing contractor when in doubt, and verify current code requirements with your local building department before any roofing project.