Scotchgard Roof Algae Treatment

I very much enjoyed reading the line "Quality shingle brands with the Scotchgard? AR System include Malarkey."

Seriously, you could probably go with zinc strips for a lot less money. They run the length of the roof peak and are attached while the house is being roofed. Here's one brand as an example:

HellT

I asked a couple of different roofing guys about the zinc strips.....both said they aren't effective for more than a few years....same answer I got from the following site at Oregon State University:

Malarkey is a Canadian company. See the web site. TB

Actually, they are out of Portland, Ore.

I have zinc strips installed on my Florida home's roof (light gray color) for the past 11 years. To this day the shingles have no trace of mildew or algae.

Several neighbors have them also. It's very easy to pick out the homes that do have them installed.