What Are Starter Shingles?
When you look at an asphalt roof, you see rows of finished shingles.
What you usually don’t see is the special material installed underneath the first row.
That’s the:
Starter strip.
Starter shingles are installed along vulnerable roof edges before the main field shingles.
GAF describes starter strips as roofing components installed at the eaves and rakes to help reduce the risk of shingle blow-off.
It is a small detail with an important job.
Why Are Roof Edges Different?
Wind doesn’t affect every part of the roof equally.
At the roof perimeter, air can catch exposed shingle edges and create uplift.
That makes the:
- Eaves
- Rakes
- Corners
important areas for secure attachment.
A properly installed starter course gives the first full row of shingles a bonded edge rather than leaving the perimeter more vulnerable.
The Starter Strip Is Not Just an Upside-Down Shingle
Modern manufacturers make dedicated starter products.
These products can include factory-positioned adhesive designed specifically to bond the first course of shingles near the roof edge.
GAF notes that purpose-made starter strips reduce the need to manually cut standard 3-tab shingles while positioning adhesive where it is intended to help resist blow-off.
That makes starter components part of the engineered roof system—not leftover material used to fill space.
Where Are Starter Shingles Installed?
Typically along:
Eaves
The horizontal lower roof edges where runoff reaches the gutter.
Rakes
The sloped outer edges of gable roofs.
GAF identifies both locations as areas where starter-strip adhesion helps secure the roof perimeter.
What Happens if the Starter Course Is Poorly Installed?
Potential problems can include:
- Weak edge bonding
- Increased vulnerability to wind uplift
- Uneven roof-edge appearance
- Poor first-course alignment
That doesn’t automatically mean the entire roof needs replacing.
It means the roof-edge installation deserves professional assessment.
Why This Matters After a Windstorm
If shingles repeatedly lift or disappear near the perimeter, don’t focus only on the missing shingle.
Ask:
Why did that area fail?
The answer could involve:
- Fastening
- Starter-strip installation
- Adhesive bonding
- Physical storm damage
Replacing one visible shingle without understanding the edge system may not correct the cause.
What Should Homeowners Ask During Roof Replacement?
Ask the contractor:
- What starter-strip product will be used?
- Is it compatible with the selected shingles?
- Will it be installed at both eaves and rakes where required?
- How does it integrate with the drip edge?
- What manufacturer installation requirements apply?
The first visible shingle should not be the first component installed.
Roof Performance Starts at the Edge.
NanoTech Exteriors looks at the complete asphalt-roofing system—not just the large visible shingle areas.
If shingles are lifting or failing around your roof perimeter, have NanoTech identify whether the problem is isolated damage, edge detailing, or wider roof deterioration before deciding what needs replacing.