How to Compare Roof Rejuvenation Contractors in Ontario

Roof rejuvenation is not a product you should buy from the best sales pitch.

You are trusting someone to determine whether an aging roof should:

• Stay
• Be repaired
• Be preserved
• Be replaced

That requires judgment.

1. Do They Inspect Before Selling?

The biggest red flag is a contractor who knows your roof qualifies before properly assessing it.

GoNano states that professional assessment is necessary because active widespread leaks, rotten decking, structural sagging, and severe deterioration can make a roof unsuitable.

2. What Product Are They Using?

“Roof rejuvenation” is a category.

Ask:

• Manufacturer
• Product
• Treatment system
• Supporting technical information

3. What Testing Can They Show?

Ask for recognized standards and actual results.

GoNano specifically recommends checking claims against documented testing rather than vague marketing language.

4. Who Installs the Product?

If you are choosing a GoNano system, verify that it is installed through the appropriate authorized/certified network so the applicable product process and warranty requirements are followed.

5. What Happens if the Roof Needs Repairs First?

The answer should not be:

“We just treat everything.”

Repairable defects should be handled before rejuvenation where appropriate.

6. What Happens if the Roof Does Not Qualify?

This may tell you more than anything else.

A trustworthy contractor needs to be willing to recommend replacement when the roof has genuinely failed.

7. Can They Explain the Warranty?

Ask who backs it, how long it lasts, and what conditions apply.

The Best Contractor Is Not the One Who Says Yes to Every Roof.

NanoTech Exteriors uses an assessment-first approach because preservation only makes sense when the existing roof is genuinely suitable for it.