When homeowners imagine how shingles stay attached, they usually think of nails.

That’s only part of the story.

Many modern asphalt shingles also use a self-sealing adhesive strip.

Once installed under appropriate conditions, that material helps bond overlapping shingles together.

CertainTeed describes asphalt self-sealing strips as continuous or intermittent adhesive areas designed to help shingles resist wind uplift.

That tiny strip plays an important role every time the wind hits your roof.

Nails Hold the Shingle to the Deck

Roofing nails provide the mechanical attachment.

They secure the shingle into the roof deck.

Correct:

• Nail placement
• Nail quantity
• Penetration
• Installation technique

all matter.

But wind does not simply pull straight upward on the nails.

It can get beneath exposed edges.

That is where the shingle-to-shingle bond becomes important.

The Seal Strip Helps Hold the Edge Down

When the adhesive activates, overlapping shingles become bonded.

CertainTeed’s CertaSeal system, for example, is specifically designed to help protect against wind uplift, shingle blow-off and moisture intrusion.

Different manufacturers use different technologies.

The principle is similar:

Keep the exposed shingle edge from becoming an easy place for wind to lift.

What Happens if Shingles Don’t Seal Properly?

Possible signs include:

• Tabs lifting
• Fluttering during wind
• Edges that remain visibly raised
• Repeated shingle movement

There can be several reasons.

For example:

• Installation temperature
• Dirt or debris
• Material condition
• Incorrect installation
• Aging adhesive
• Previous wind damage

The cause needs to be identified rather than assuming every lifted shingle needs replacement.

Why Roof Edges Matter

Eaves and rakes can be especially exposed to wind.

This is why roofing systems often use dedicated starter strips along those areas.

GAF notes that its starter strip products use factory-applied adhesive specifically to help reduce shingle blow-off at the eaves and rakes.

A roof therefore relies on a system:

• Deck
• Underlayment
• Starter strip
• Fasteners
• Shingle seal strips
• Ridge components

One component alone doesn’t create wind resistance.

Can Old Shingles Lose Their Seal?

Aging roofing may become:

• Brittle
• Curled
• Distorted

Those physical changes can affect how securely shingles remain seated.

But if shingles are visibly lifting, the correct next step is inspection.

Don’t:

• Glue down random areas yourself
• Add exposed nails through the face
• Assume the roof needs full replacement

First identify whether the issue is:

localized attachment

or

widespread material deterioration.

Roofing Nails Matter. So Does the Bond Between Shingles.

If you notice raised tabs or shingles moving after wind, have the roof assessed before that small attachment problem becomes missing roofing after the next storm.

NanoTech Exteriors can help determine whether the issue needs localized repair, broader roofing work, or preservation of the remaining sound roof.