[kach22i]

Is this the product you are talking about?

Timberline® Cool Series® Energy-Saving Shingles
https://www.gaf.com/Roofing/Residential/Products/Shingles/Timberline/Cool_Series/Features

Thanks to the reflective nature of the Cool Series® Shingles, part of the heat radiating from the sun gets reflected, reducing the heat in the attic and heat going into the house. It may translate into substantial savings in air conditioning bills.

Cool roofs may save residents an avg. 7-15% of total cooling costs, depending on geography, structure, and climate. In warmer climates, cooling-cost savings may be greater year round.*

Many ways to lower solar heat transference rate to attic or ceiling spaces. Trick is doing it cheaply enough to recover the investment.

This looks like a simple fix compared to others I could tell you about.

Simply put, our Cool Series® Shingles use specially designed roofing granules that have greater reflectance than traditional shingles. This results in less transfer of heat to the space below—to keep you cooler in the summer.

Go for it.

https://www.gaf.com/Roofing/Residential/Products

Install Any GAF Lifetime Shingle & At Least 3 Qualifying GAF Accessories & You'll Automatically Get: A Lifetime ltd. warranty on your shingles and all qualifying GAF accessories!* PLUS Non-prorated coverage for the first 10 years! * To get even stronger coverage, choose a System Plus or Golden Pledge® Ltd. Warranty from a GAF factory-certified contractor!