|Posted on Thursday, September 29, 2005 - 11:53 am: ||
What does the "non-fading" mean in Buckingham Slate's "non-fading" Black? Is this referencing color? Has anyone heard of rust or iron-type stains in slate roofing products? If so, is there a way to fix this problem other than replacing all the slate?
|Posted on Friday, September 30, 2005 - 10:24 am: ||
So-called "fading" or "weathering" slates change color when exposed to weather, which is sometimes a radical change (from green to brown, for example) and sometimes just actually a fading of the original color. "Non-fading" slates keep their original color over time (more or less).
Yes, rust stains are common on some types of slate such as some Spanish black slates and some Chinese black slates. These are often caused by iron bearing pyrite deposits in the slate stone. You can replace just those slates that are rusting, but if the entire roof is rusting, you have to either live with it or replace the roof.