If you have terracotta roof tiles, chances are you’ve noticed some dark staining on the surface of the tiles. This is called “fretting” and it’s caused by a number of different factors. In this blog post, we’ll take a closer look at what fretting is, how it happens, and what you can do to prevent it from happening to your terracotta roof tiles.

Fretting occurs when the top layer of the tile glaze is worn away, exposing the underlying clay body to the elements. The most common cause of fretting is physical damage to the tiles, such as from hail or high winds. However, fretting can also be caused by chemical reactions between the tile and pollutants in the air. For example, if there is a lot of industrial pollution in the air, it can cause the tiles to corrode.

In most cases, fretting is not a structural problem and will not affect the overall integrity of your roof. However, it can be unsightly and it can make your roof more susceptible to dirt and stains. Therefore, it’s important to take steps to prevent fretting from happening in the first place.

One way to prevent fretting is to choose a high-quality terracotta roof tile that has been properly glazed. You should also have your roof inspected regularly for any signs of damage or wear and tear. If you do notice any damage, it’s important to have it repaired as soon as possible so that further damage doesn’t occur. Finally, you should always keep your gutters clean and free of debris so that water can drain away from your roof quickly and efficiently.

Fretting is a common problem with terracotta roof tiles but it’s one that can be easily prevented with proper care and maintenance. By choosing a high-quality tile, having your roof inspected regularly, and keeping your gutters clean, you can help ensure that your terracotta roof tiles will stay in good condition for many years to come.