How to Replace Missing or Damaged Roof Shingles

A missing shingle isn’t just an eyesore — it’s an open door for water. The bare felt or deck underneath is not waterproof on its own, and even a single missing shingle can allow enough moisture infiltration to rot the decking beneath it. The good news is that replacing individual shingles is one of the most accessible DIY roofing repairs, and most homeowners can do it in an afternoon with basic tools and about $50 in materials.

This guide covers the full process for both 3-tab and architectural (dimensional) shingles, from pulling the damaged piece to sealing the repair.

Before You Start: Assess the Situation

Not every shingle problem warrants a DIY replacement. First, understand what you’re dealing with:

When DIY replacement makes sense:

1–10 individual shingles are damaged or missing
The surrounding shingles and deck are in good condition
The roof pitch is 6:12 or less
You’re comfortable on a ladder and reasonably sure-footed

When to call a professional:

More than 10–15 shingles are damaged in one area
The decking beneath feels soft or spongy
You see daylight through the roof boards
The pitch is steep (above 6:12–7:12)
The damage is near a chimney, skylight, or valley

If the damage covers more than about 100 square feet — one roofing “square” — you’re approaching territory where a professional crew with the right equipment will do better work, faster, at a comparable total cost to your time and materials.

Tools and Materials

Tools You’ll Need

Flat pry bar or shingle remover
Hammer, or a roofing coil nail gun (recommended for more than 5–6 shingles)
Utility knife with fresh blades
Caulk gun
Chalk line (optional, helpful for alignment)
Tape measure
Work gloves and safety glasses
Rubber-soled shoes
Sturdy ladder (with standoff bracket)

Materials You’ll Need

Replacement shingles — match your existing roof as closely as possible; bring a photo or a shingle sample to the lumber yard. A bundle covers approximately 33 sq ft and costs $30–$80 depending on type.
Roofing nails — 1-3/4 inch hot-dipped galvanized. Never use drywall nails or staples.
Roofing cement — Henry 208 fibered roofing cement is an industry standard for this type of repair
Roof sealant / caulk — for sealing nail heads on exposed nails

Understanding the Difference: 3-Tab vs. Architectural Shingles

Before diving into the steps, it helps to know which type of shingle you have.

3-Tab shingles are flat, uniform-thickness shingles with two cut slots that create the appearance of three separate tabs. They’ve been largely replaced by architectural shingles in new construction but are still found on millions of older homes. They’re thinner, lighter, and slightly easier to work with.

Architectural (dimensional) shingles have a laminated, textured look with varying thickness. They’re thicker, heavier, and the irregular surface means alignment is less critical visually — but they’re stiffer and more prone to cracking in cold weather. Most shingles installed in the last 15 years are architectural.

The removal and installation process is largely the same for both types. The main difference is that 3-tab shingles have a defined nailing strip and tab pattern, while architectural shingles have a wider nailing zone and require slightly more attention to the nail placement specified by the manufacturer.

Step 1: Access the Roof Safely

Position your ladder on solid, level ground. Use a ladder standoff / stabilizer to keep the ladder away from the gutters and to give yourself a stable platform at the eave. Never lean a ladder directly against gutters — they’ll deform and you’ll lose stability.

Once on the roof, move carefully. Distribute your weight, step on the thicker part of shingles (not the tab edges), and stay low to the slope when you need to move laterally. Carry tools in a tool belt or bucket — don’t set things down where they can slide off.

Step 2: Remove the Damaged Shingle

Shingles are held in place by nails and by the adhesive bond between the self-seal strip on the bottom of each shingle and the top surface of the shingle below it. Breaking that seal is step one.

For 3-Tab Shingles

Lift the tabs of the shingle directly above your damaged shingle. Slide the flat end of your pry bar carefully under the tabs to break the adhesive seal without tearing them.
Expose the nails. Each 3-tab shingle has four nails, typically placed just above the cutout slots in a line. The nails from the course above will also be covered by your target shingle — you’ll need to remove or raise those too.
Pop the nails. Slide the pry bar under the shingle and over each nail head to lever it up. Alternatively, lift the nails from above by prying under the shingle above.
Slide the shingle out. Once all four nails are free (and the two nails from the course above that overlap it), the shingle slides straight out toward you.

For Architectural Shingles

The process is the same in principle, but architectural shingles have a wider, thicker body and are often bonded more aggressively. Work slowly to avoid tearing the shingles in the course above — they’re more expensive to replace and harder to match exactly. In cold weather (below 40°F), the adhesive bond is less flexible; use extra care.

Each architectural shingle typically has four to six nails across the nailing strip. Work each nail individually rather than trying to pop the whole shingle at once.

Step 3: Inspect the Deck

Before sliding in the new shingle, take a moment to inspect the deck below. Press on the plywood — it should feel solid. Look for:

Dark staining (indicates past moisture infiltration)
Soft or spongy spots (rot)
Damaged or missing underlayment

If the deck is sound and the underlayment is intact, proceed. If you find rot or significant damage, repair the deck first. A $40 repair on top of a rotted deck will fail within a year.

If a small area of underlayment is torn, you can patch it with a piece of self-adhering ice-and-water membrane or simply apply a thin layer of roofing cement over the affected area before laying the new shingle.

Step 4: Slide In the New Shingle

Position the shingle. Slide it under the tabs of the shingle above and align it with the shingles on either side. For 3-tab shingles, the cutouts should align exactly with the pattern of surrounding shingles. For architectural shingles, align the bottom edge with adjacent shingles.
Check the offset. Shingles are installed in a staggered pattern — each course is offset from the one above and below by at least 6 inches (often more) to prevent water from tracking straight down a vertical seam. If you’re replacing a single shingle, the offset is already set by the pattern around it.

Step 5: Nail the Shingle

Nailing is where most DIY roofing mistakes happen. Key rules:

Nail placement matters. For 3-tab shingles, nails go just above the cutouts in the nailing strip — typically about 5/8 inch above. For architectural shingles, follow the manufacturer’s specified nailing zone printed on the shingle wrapper or product sheet.
Four nails minimum for most shingles. Six nails in high-wind areas (above 90 mph design wind speed). Never use fewer than four.
Don’t overdrive. The nail head should sit flush with the shingle surface — not countersunk into it. An overdriven nail cuts through the shingle and loses holding power. An underdriven nail (head proud of the surface) will work up and puncture the shingle above.
Use 1-3/4 inch nails to penetrate through the shingle, through the underlayment, and at least 3/4 inch into the decking.

If using a nail gun, set the pressure carefully — slightly overdriving is the most common nail gun mistake. Test on a scrap piece first.

Step 6: Reseal the Course Above

Once your new shingle is nailed, the shingles directly above may have been lifted and had their adhesive seal broken during removal. Apply a dime-sized bead of roofing cement under each tab or along the adhesive strip of those shingles and press them back firmly.

This step is often skipped, but it matters — un-resealed shingles above a repair are a common reason repairs fail in the first wind event.

Step 7: Seal Any Exposed Nail Heads

If any nail heads are visible in the repair area — typically the nails driven through your new shingle that can’t be covered because there’s no overlapping course above (this happens at the ridge or at the very top row) — apply a small dab of roofing cement over each head to prevent corrosion and water infiltration.

Step 8: Final Inspection

Stand back and look at the repair from the ground. Check that:

The new shingle is properly aligned with the course
No edges are lifted
The tabs of the shingles above are sealed back down
There are no exposed nail heads

Go into the attic after the next rain and check for any moisture near the repair area. A successful repair will be bone dry.

How Many Shingles Do You Need?

Shingles are sold by the bundle, and it takes three bundles to cover one roofing square (100 sq ft). Here’s a quick reference:

Number of Shingles to Replace	Approx. Bundle(s) Needed
1–5 shingles	1 bundle (you’ll have leftover)
6–15 shingles	1 bundle
16–30 shingles	1–2 bundles
31–50 shingles	2 bundles
Full square (100 sq ft)	3 bundles

Buy at least one extra bundle of any special-order color — shingle colors can shift between production runs and it’s difficult to get a perfect match later.

Cold Weather Tips

Shingles become stiff and brittle below 40°F. If you’re doing this repair in winter:

Store shingles in a warm area (garage) overnight before the job
Work in the warmest part of the day
Don’t force shingles to lie flat — they’ll crack. Let them warm up slightly before bending
The adhesive strips may not self-seal in cold weather; use roofing cement under each tab rather than relying on solar activation

Products Referenced

Replacing individual shingles is genuinely one of the most satisfying DIY home repairs — it’s visible, it’s finite, and a good result lasts for years. Take your time on the nail placement and the resealing step, and you’ll have a repair that holds up as well as the original installation.