You have an aging asphalt roof.

Most of it looks serviceable.

But there are two cracked shingles near the back.

Does that automatically eliminate roof rejuvenation?

Not necessarily.

This is where the difference between localized damage and roof failure becomes important.

GoNano currently states that isolated, repairable issues can sometimes be corrected before treatment. Small repairs can include replacement of shingles that are missing, broken, or loose.

But that does not mean every damaged roof should be rejuvenated.

Repairable Is Not the Same as Failed.

Problems That May Be Repairable First

Depending on the roof, localized problems can include:

• A small number of missing shingles
• A few broken shingles
• Loose shingles
• Minor isolated defects

If the surrounding roofing system remains structurally sound, those areas may be repaired before the rejuvenation process begins.

That is very different from spraying over the problem.

The defective material gets addressed first.

What Usually Disqualifies a Roof?

GoNano’s current candidate guidance identifies several conditions that generally rule out Structural Roof Rejuvenation:

• Widespread active leaks
• Extensive missing shingles
• Badly deteriorated shingles across large areas
• Soft or rotted decking
• Structural sagging
• A roof that has reached genuine structural failure

At that point, preservation is no longer the responsible strategy.

You need repair or replacement appropriate to the failure.

Why Can’t You Just Rejuvenate Around Damage?

Because rejuvenation is designed to improve the performance of existing viable shingles.

It is not:

• Plywood
• New flashing
• Structural framing
• Replacement shingles

A treatment cannot rebuild material that is no longer present.

That is why qualification matters.

What About a Small Leak?

A leak requires diagnosis.

Sometimes a roof can have an isolated, repairable problem around:

• Flashing
• A penetration
• One damaged area

But widespread leakage suggests a larger system failure.

Before rejuvenation, the source needs to be found and corrected.

Never use preservation to avoid a necessary repair.

Why This Matters When You’ve Been Quoted for Replacement

A replacement contractor may see several damaged shingles and recommend tearing off everything.

Sometimes that is correct.

Sometimes the damage is localized.

The smarter question is:

How much of the roof has actually failed?

If 95% of the roof remains structurally sound and a few areas need conventional repair, that is a different situation from a roof with widespread deterioration.

The answer should come from inspection.

The Right Sequence

For a qualifying roof:

1. Inspect

Understand overall roof condition.

2. Identify defects

Separate localized repair from broad failure.

3. Repair what needs repair

Replace missing, loose, or damaged components where appropriate.

4. Reassess

Confirm the roofing system remains a candidate.

5. Rejuvenate

Treat the viable asphalt roofing.

That is a much more responsible process than trying to force every roof into one service.

A Few Bad Shingles Don’t Define the Entire Roof.

But they should not be ignored either.

If most of your asphalt roof appears healthy but a few areas are damaged, NanoTech Exteriors can determine whether repair plus rejuvenation is realistic—or whether the roof has progressed too far.