RETURN TO I Have An Existing Metal Roof and Have A Question
RETURN TO FORUM
Every application could be different based on the structure, its construction, the screws, and even the roof panels. If the screws loosen, it will become apparent visually. What I often hear from the field is screws have to be tightened after about 7 years and then replaced with a larger diameter screw about year 15.
The industry practice generally is to go to a slightly larger screw in order to ensure secure fastening and coverage of the fastener hole.
What is the real time frame and/or tests that can be conducted on the screws on a metal roof, before the screws need to be replaced. Everyone has an opinion.
I am replacing the screws in my metal roof. I believe they are original, about 23 years old (age of the building and roof). They are #14 1-1/4. I was planning to purchase the same size product (I tested one screw and it seemed snug) but the person at the building supply store recommended using thicker and slightly longer screws this time. What is the best choice when replacing screws? Thanks.
When replacing the rib screws with larger diameter and longer shaft (per the previous comments), is there any benefit to filling the existing hole with silicone or other sealant like an STPe to help seal internally? What negatives might there be to doing this?
