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Close-up of asphalt shingle roof installation

Asphalt Shingle Roofing in Fort Wayne & Grabill, Indiana

Close-up of asphalt shingle roof installation

// Asphalt Shingle Roofing

The Most Common Roof For A Reason

Asphalt shingles remain the go-to choice for most homes because of the upfront cost, the range of styles, and how easy they are to repair in sections. GNG installs both 3-tab and architectural shingle roofs across Northeast Indiana.

Weighing materials? Compare this against metal roofing before you decide. If the existing roof is at the end of its life, the job is a full roof replacement and the shingle is the material choice inside it; if the damage is contained, it is a roof repair. See all of our roofing services.

// Why Homeowners Choose Asphalt

Benefits Of Asphalt Shingles

Lower upfront cost than most other roofing materials
Wide selection of colors and styles
Easier to repair in sections than some other materials
Faster installation timeline
Algae-resistant options available
Manufacturer warranties on materials

// Definition

3-Tab vs Architectural Shingles

The difference is one layer of laminate, and it changes cost, wind rating, and lifespan.

A 3-tab shingle is a single flat layer cut into three tabs, so the finished roof reads as a uniform grid. An architectural shingle, also called a dimensional or laminate shingle, bonds two or more layers together, which makes it thicker, heavier, and textured rather than flat. That extra laminate is why architectural shingles carry higher wind ratings and longer manufacturer warranties, and why they cost more per square.

For most Northeast Indiana homes the choice has already been made by the market: architectural is what nearly every new roof uses now, and 3-tab has become the budget option or the match for an existing 3-tab roof on a detached garage. The one place 3-tab still makes obvious sense is a rental or an outbuilding where the goal is a sound, code-compliant roof at the lowest defensible cost.

Beyond the profile, the specification that actually matters in this climate is algae resistance. We will show you samples of both and tell you which line we would put on our own house.

// Straight Answers

Asphalt Shingle Questions, Answered

How long do asphalt shingles last in Indiana?

Architectural shingles are commonly rated in the 25 to 30 year range and 3-tab for less, but a rating is a laboratory number, not a promise about your house. What decides it here is attic ventilation, sun exposure on the south and west slopes, and how well the roof was flashed and nailed. A poorly ventilated attic can take years off a shingle roof, because trapped heat cooks the asphalt from underneath. A free roof inspection tells you where yours stands.

Why do shingle roofs fail early?

Four causes account for most early failures and only one of them is the shingle. Bad ventilation cooks the roof from below. Nails driven too high, overdriven, or underdriven let tabs lift and leak. Missing or reused flashing puts water in at every wall, chimney, and valley. And a layover on top of an old roof hides decking problems that keep working underneath. A shingle roof that fails at 14 years usually failed at installation.

Can new shingles go over an old roof?

Sometimes it is allowed and rarely is it a good idea. Local codes generally cap roofing layers, so a house that already has two is out. Even where a layover is permitted it hides the decking, adds weight, and can shorten the life of the new shingles, because the surface underneath is uneven and holds heat. We quote full roof replacement as a tear-off, and we will explain the tradeoff rather than quietly pricing a layover to look cheaper.

What are the black streaks on my roof?

Algae, not dirt and not damage. It feeds on the limestone filler in asphalt shingles and shows up first on north-facing slopes that stay damp longest. It is cosmetic rather than structural, so it is not a reason to replace a sound roof. Algae-resistant shingle lines mix copper granules into the surface to suppress it, which is worth specifying on any new roof in this climate.

What wind rating should a shingle roof have here?

Shingles carry a manufacturer wind rating, and architectural lines are generally rated higher than 3-tab. The rating only holds if the shingle is installed to that specification, which usually means a set nail count in the correct nailing zone and a sealed starter course along the eaves and rakes. A high-rated shingle nailed six inches too high performs like a cheap one. Ask what the nailing pattern will be, not just which shingle is being installed.

Does shingle color matter?

Less than people expect for performance and more than people expect for resale. Darker shingles absorb more heat, but attic ventilation and insulation drive attic temperature far more than shingle color does. Where color matters is matching the house and the neighborhood, and how the roof looks against brick, stone, or siding you are not changing. We bring samples to look at outdoors, because roof color reads differently in daylight than under store lighting.

// Installation

What Separates A Good Shingle Roof From A Cheap One

On a shingle roof, almost everything that determines lifespan happens before the shingles go on and is invisible afterward. Ice and water shield at the eaves and in the valleys. Synthetic underlayment across the field instead of felt. Drip edge at the rakes and eaves, new rather than reused. A proper starter course along the bottom edge with its adhesive strip at the eave rather than flipped. Correct nail placement in the nailing zone, driven flush, four to six per shingle depending on the manufacturer and the wind rating. New step flashing at every wall.

Those are the line items to compare between bids, and they are the ones that quietly disappear from a low number. A bid that is meaningfully cheaper than the others is usually cheaper because it is a smaller scope, not because the crew is faster.

GNG is an Amish-owned family business working out of Grabill, licensed and insured, and roofing in Northeast Indiana for more than 34 years. Our own crew installs every roof and the workmanship carries a 10-year craftsmanship warranty. Google reviewers rate us 4.9 out of 5 across 30 reviews. Read about the family behind GNG.

New asphalt shingle roof replacement in Northeast Indiana

// FAQ

Asphalt Shingle Questions

What's the difference between 3-tab and architectural shingles?

3-tab shingles are flat and uniform, while architectural shingles are thicker and layered for more dimension and a longer service life. We'll help you weigh cost against how long you want the roof to last.

How long do asphalt shingle roofs last?

Lifespan depends on the shingle grade, ventilation, and weather exposure. We'll go over realistic expectations for your specific roof during your estimate.

Do you offer algae-resistant shingles?

Yes, most manufacturers offer algae-resistant lines, which matter in Indiana's humid summers. We can show you samples.

What are the black streaks on my shingle roof?

Those streaks are algae, not dirt and not damage. It grows on the limestone filler in asphalt shingles and shows up first on north-facing slopes that stay damp longest. It is a cosmetic problem rather than a structural one. Algae-resistant shingle lines mix copper granules into the surface to suppress it, which is worth specifying on a new roof in this climate.

GNG Roofing completed metal roof project

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