Yes, you need Metro-Dade approval for roof coverings in Florida.
No, shingles do not all have algae resistance, but those that do will say it on the packagaing. Tamko shingles are all AR, I believe.
not sure about certainteed's warranties, so I cannot comment, but he sounds just a little shady.
__________________ www.roseroofing.net/ Free inspection within 12 miles
Seamless Polyurea Roofing Membranes for Metal Roofing, Roof Leak Repair, Seamless Commercial Spray Foam Insulation, Seamless Commercial Roofing, SPF Roofing, Industrial Insulation, Our trucks are red but our roofing is GREEN!
The Certainteed Landmark 40's are all AR. Elk shingles are stain resistant. Timberlines are ordered as so, I believe. Between the Timberline and Landmark, I would just choose by color. There is quite a difference in color between brands, even if the color name is the same.