Starter Shingles: What They Do and Why Your Roof Needs Them

Starter shingles seal your roof's eaves and rakes against wind and water. Learn what they do, how they differ from ridge caps, and what Tampa Bay roofs need.

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Starter Shingles: What They Do and Why Your Roof Needs Them

Starter Shingles: What They Do and Why Your Roof Needs Them

Starter shingles beneath the first roof course

💬 Hi, I’m the Hytz Roofing assistant, and this is one of the questions we hear most. Starter shingles are the first row of shingle product installed along the bottom edge (the eave) and sloped sides (the rakes) of your roof. They seal the edges against wind uplift and water, and they cover the gaps between the first full course of shingles. Yes, a properly built shingle roof needs them.

Below, I’ll explain what they are, how they differ from regular shingles and ridge caps, what happens when they’re left out, and what to ask your roofer in Tampa Bay.

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TL;DR

  • 🧱 Starter shingles go on before the first visible course. They sit at the eaves and rakes and have a factory sealant strip.
  • 💨 Their job is to block wind-driven rain and resist wind uplift at the most exposed edges.
  • ✂️ A cut piece of a regular 3-tab shingle is not a true starter. Building code guidance warns against it.
  • 🔝 Ridge caps are a different product. They cover the peak and hips, and they need correct nailing and direction to stay on in wind.
  • 📋 Ask your estimate to list starter and hip and ridge products by name.

Table of Contents

What starter shingles are

Starter shingles are the initial shingle product installed just before the first course of finish shingles. IKO explains that at the eave they cover the joints between the finish shingles in the first course, so water has no straight path through. At the rake, their sealant strip helps bond the ends of the finish shingles once the sun warms it, which reduces wind uplift.

They are made much like other fiberglass-reinforced asphalt shingles. The same IKO page notes they usually carry darker, uncolored granules and a plain rectangular shape that works under many shingle styles. Nobody sees them once the roof is done, so color doesn’t matter. Function does.

Starter strips come in two common forms. Fine Homebuilding describes them as either a 3-tab shingle with the bottom 5 inches cut off, or a purpose-made strip sold on rolls in different widths. The factory-made version has its adhesive placed where it needs to be, which is the whole point, and we’ll get to that below.

What starter shingles are

What starter shingles do on your roof

They do three jobs.

1. Fill the gaps at the eave

Shingles have cutouts and joints. In the first course, there is no row underneath to cover those spaces. The starter course fills that role, so water running down the roof can’t slip through a joint at the very bottom. CertainTeed says their main function is to prevent water infiltration and wind uplift at the vulnerable edges, which helps limit leaks from wind-driven rain.

2. Seal the edges against wind

Wind gets under a roof at its edges first. The adhesive strip on a starter shingle bonds the first course of shingles down at the eave. On the rakes, it does the same for the shingle ends. A cut-down 3-tab piece usually puts its sealing strip in the wrong place. Georgia’s building code recommendations say a cut 3-tab should never be used as a starter, because the strip isn’t at the roof edge and wind-driven rain can get under the starter course.

3. Back up the underlayment

The same document points out that felt is water resistant, not waterproof. Over time, wind-driven rain can break it down and leave the decking wet. A sealed starter course is one more layer of protection at the spot where water hits first.

A bonus: a cleaner edge

Fine Homebuilding adds that running starter along the rakes isn’t strictly required, but it’s smart. It stiffens the overhanging shingle edges and gives a cleaner line when you look up at the roof.

Do you need starter shingles?

Short answer: yes. Here’s the practical picture.

  • Code and manufacturers. RoofersCoffeeShop notes that starter strips are often required by building code at the leading edge of the roof. In some wind zones or climates, they may also be needed along the rakes.
  • Warranty. Shingle makers tie warranty coverage to their installation instructions. Malarkey’s Certified Pro requirements say only the manufacturer’s own products may be used for starter and hip and ridge shingles. Other brands set similar terms, so it’s worth confirming for your shingle line.
  • Wind rating. The Building America Solution Center explains that building codes require asphalt shingles, including hip and ridge shingles, to be tested and classified for wind resistance under ASTM D7158 or D3161. Fastener counts must follow the manufacturer’s instructions, with at least four per strip shingle.

In Florida, there is extra detail. In the High-Velocity Hurricane Zone (Miami-Dade and Broward), the Florida Building Code’s roofing application standard calls for starter strips set in flashing cement and nailed within 4 inches of the eave. Tampa Bay isn’t in that zone, but it shows how seriously Florida treats edge details. Local jurisdictions can also require specific product approvals, as the Solution Center notes, so your roofer should pull the right permit for your county.

What happens if they’re skipped or done wrong

People often ask what happens if you skip starter shingles, or use flipped regular shingles in their place. The risks follow directly from the jobs above:

  • Joints in the first course sit open, so wind-driven rain can reach the underlayment and the deck.
  • The first course isn’t bonded at the edge, so a strong gust can lift it. Once the edge lifts, the next row is easier to lift too.
  • Shingle manufacturers’ installation instructions may not be met, which can complicate a warranty claim.

Tampa Bay storms push rain sideways, so edges matter. If you’re seeing edge leaks or curling shingles at the eave, our guide on wind-driven rain roof leaks covers the usual causes. For lifted or missing shingles after a storm, see what to do about wind-damaged shingles.

Starter shingles vs. regular shingles

Starter shingles Regular (field) shingles
Where they go Eave and rakes, under the first course Across the whole roof, visible
Main job Seal edges, cover first-course joints Shed water, give the roof its look
Adhesive Placed to bond at the edge Placed for the course above
Granules Usually plain, darker Colored blends
Overhang About ¼ to ¾ inch past the edge Set by the course layout

The overhang figure comes from the Building America Solution Center and IKO. The Solution Center also says the starter at the rake should overlap the eave starter by 3 inches, and that nails go 2 to 3 inches up from the bottom edge. Always follow the instructions printed on the bundle for your product, because they set the exact nail spots.

What are ridge cap shingles?

Ridge cap shingles cover the peak where two roof slopes meet. Same idea as starters, different location. IKO describes them as pieces separated at the perforations, bent over the peak, and nailed down along the ridge.

They are a separate product, not just regular shingles folded in half. Georgia’s code recommendations say a true hip and ridge shingle made for the product line should be used at all hips and ridges, and that a 3-tab or laminated shingle should never be cut, bent, and used there. The same page says that without the matching cap, the manufacturer will not warranty the installation.

What are ridge cap shingles?

Ridge cap vs. hip cap

There is no separate “hip cap” shingle for most lines. Hips (the sloped lines where two roof planes meet at an outside corner) get the same hip and ridge product as the horizontal ridge. The difference is how it goes on. Owens Corning’s instructions say hip shingles are applied before ridge shingles, and each ProEdge shingle is perforated into three pieces. On hips, installers start at the bottom. IKO notes the first piece gets trimmed so its corners don’t hang into the gutter.

Caps also have their own starter. Owens Corning says to make a hip or ridge starter by removing the 6-inch exposure portion of the shingle, then fastening with one nail on each side, 1 inch from the side edge and 1¼ inch from the cut end.

Why ridge caps blow off

Most ridge cap problems after a storm come down to nailing, sealing and direction. Roofing consultant Daniel Friedman’s InspectAPedia page says wind damage and blow-offs from inadequate nailing are the most common failure at ridges and hips, whatever the roofing material.

What to look for:

  • Nail placement and length. IKO says to nail ridge caps five and five-eighths inches above the butt edge and one inch in from each side. The nails also have to be long enough. The City of Council Bluffs building guide, citing the model code, calls for corrosion-resistant roofing nails that reach 3/4 inch into the sheathing.
  • Direction. IKO says to start at the end of the ridge opposite the prevailing wind, so the wind pushes over the lapped edges and not into them. AskARoofer makes the same point and says it’s fine to run caps in one direction instead of meeting in the middle.
  • Sealing. Sealant needs warmth to bond. AskARoofer notes that a cap installed in cold weather may never fully seal. Florida’s warm climate helps here, but the sealant still needs sun and a clean surface. IKO also says the final cap should be set in cement, with the exposed nail heads covered.

If caps have blown off, don’t wait for the next storm. An open ridge lets rain straight into the attic. Cover it temporarily if it’s safe, keep photos for your insurer, and have a licensed roofer look at the whole ridge. Never climb a wet roof yourself. Our roof repair team handles wind damage, and we can help with the insurance claim process too.

A note for metal roof owners

Starters aren’t only an asphalt shingle topic. Metal roofs have their own eave starting details, and the idea is the same: a clean, secure first edge. If you’re curious how that works with standing seam panels, here is a look at eave starter for standing seam. Our metal roofing page shows what we install in Tampa Bay.

What to ask your roofer about starters and caps

📋 Use this quick checklist with any estimate:

  1. Is a manufacturer-made starter strip included at the eaves and rakes?
  2. Are hip and ridge shingles from the same product line as the field shingles?
  3. How are the caps nailed, and which direction will they run for our prevailing wind?
  4. Is drip edge included? (Starters overhang the drip edge by a fraction of an inch. See drip edge vs. gutter apron.)
  5. Will the installation follow the manufacturer’s instructions for the warranty?

Line items should spell these out. Our walkthrough on reading roofing estimate line items shows where starter, cap and drip edge usually appear. For the full sequence of a replacement, see roof shingle replacement step by step.

If you’re choosing a brand, we install GAF shingles and Owens Corning shingles, and our asphalt shingle page explains the options.

Our perspective

Starter shingles are cheap compared with the roof sitting on top of them, and that is exactly why we never treat them as optional. On every shingle roof we install, we want the edges sealed, the first course bonded and the caps matched to the shingle line.

Florida wind finds the weakest edge. We’re a GAF Master Elite contractor, and our approach is to follow the manufacturer’s installation instructions and local code on every job, because that is what keeps the roof performing and keeps manufacturer-backed warranties meaningful. Our positioning is a 50-year material and 25-year workmanship warranty, and details like starter and ridge work are part of earning it.

When you compare bids, ask each roofer how the eaves, rakes and ridges are handled. You’ll learn a lot from the answer, and we’re always glad to walk you through ours.

Anthony

Get your roof’s edges checked

🚨 Seeing lifted shingles at the eave, missing ridge caps, or stains after wind-driven rain? Hytz Roofing is a licensed and insured contractor (Florida License #CCC1332551) serving Tampa Bay and Central Florida. Minor shingle repair is listed at $150 to $400, and full roof replacement at $9,000 to $30,000 depending on the roof. You can see how that range works on our roof replacement cost guide.

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💬 Want a pro to look at it? Book a roof inspection and we’ll check the eaves, rakes, ridge and hips, and give you an itemized estimate.

FAQ

Do you really need starter shingles?

Yes. They seal the first course and the rake edges, which are the most exposed spots on a shingle roof. Building codes often call for a starter at the eave, and manufacturers expect their own starter product in warranty-backed installations.

What happens if you skip starter shingles?

The joints in the first course are left open, and the edge isn’t bonded down. Wind-driven rain can then reach the underlayment, and wind can lift the edge shingles. It can also put the installation out of line with the manufacturer’s instructions.

What is the difference between starter shingles and regular shingles?

Starters are made to go under the first course and carry adhesive in the right place for edge sealing. They usually have plain, uncolored granules since they are hidden. Regular shingles are the visible, colored layer that sheds water across the roof.

Are ridge caps and hip caps the same shingle?

For most product lines, yes: one hip and ridge product covers both. The installation differs. Hips are capped first, starting at the bottom, and the ridge goes on after. Always follow the instruction sheet for your specific product.

Why did my ridge cap shingles blow off?

The usual causes are too few or poorly placed nails, short fasteners, caps run into the wind, or sealant that never bonded. A licensed roofer can check the whole ridge and repair it to the manufacturer’s specifications.

Sources