A zinc strip can be installed on a roof to prevent moss from growing. The zinc prevents the growth of the moss as the strips become corroded from moisture. The corrosion releases the zinc.
Zinc Strips kill moss. The moss dies and the roof stays moss free for 10 feet under a zinc strip for five years or so if it stays in place and stays flat. Homeowners can install strips of zinc, purchased at a hardware store.
While black stains on roofs are a cosmetic issue, moss growth is more than just cosmetic. Not only does moss look terrible on roofs, it will also shorten the life of the roof covering and possibly lead to roof leaks. Whether you have wood or asphalt shingles, moss can grow on the roof if it doesn't dry properly.
I have heard this bandied about between roof cleaning companies and home inspectors and roofers. The fact is: it Does work. Zinc strips on your roof keep it looking new.
Notify me when this product is available:. I agree to subscribe to updates from washsafe. Installation: Apply zinc to the first full course of shingles below the ridge cap from end to end and also below any obstruction like skylights.
Notice the lack of moss downstream of the chimney and flashing. This happens because tiny amounts of zinc get dissolved from the chimney. This is especially true with lichen.
Shingle Shield Zinc Strips interrupt the flow of rain and naturally time release invisible fungistatic compounds of zinc oxide which travel down the roof slope. These compounds are absorbed by the roof surface and inhibit the growth of fungus, moss, and algae. When you see the Call to Order button next to a product in the Wimsatt catalog, that means that it is not available for order online.
I had zinc strips applied to my roof and they do keep the moss at bay. They were slid under the edge of shingles, but were nailed in. Not sure about caulking them in.
In this video, This Old House general contractor Tom Silva shares tips for keeping a roof free of moss and mold. You can cut strips of zinc flashing copper and lead work, too and slide them under a course of roof shingles to kill lichen and moss growing there, or you could just buy these premade strips from Shingle Shield. The premade ones are much quicker and probably neater looking.
Install Copper Strip on Roof You can install a inch-wide thin copper strip on a new roof so an inch of the copper strip rests under the cap shingles and the copper folds under the last full shingle on the roof. Copyright Tim Carter. Watch this short video first. It shows installing the copper strip on an existing roof, not a new one.