Will Silicone Harm Rubber Washer Om Metal Roof

Silicone coatings are less elastic than comparable coatings and have a tendency to crack and peel quickly.

Will silicone harm rubber washer om metal roof.

Occasionally a screw misses the mark altogether and misses the metal strut or wood framing that it needs to bite securely. When this happens the washer has nothing to seal against. As the oil comes off the roof the silicone will too. These roofs are all single ply membranes that often have an oily film on them at installation.

If a screw is driven into the metal roofing panel at an angle the rubber washer cannot sit flatly on the roof and will not seal. When you choose to work with a silicone roof coating instead then the product may provide you with a 10 year warranty or sometimes longer but some providers might only give you 5 years of protection. If you decide to go with a metal roof then that guarantee might stretch out to 50 years or more. While these coatings are effective against water they get dirty and lose reflectivity up to 45 and any energy savings very quickly.

Even then after 15 20 years its not a bad idea to have someone go up on the roof and inspect the fasteners. If your screws are hitting the rafters replace the short screws with new longer screws with new rubber washers. This protects the rubber from the uv rays of the sun greatly prolonging its life span. Screwing into plywood isn t a great idea.

So we offer a primer that cleans off this oily film and allows the silicone to adhere perfectly.