Flashing is used in order to help direct the flow of water around openings on a roof or anywhere that a roof meets a wall. Since water can seep into walls, which can cause structural damage, it’s important to install flashing when constructing a new home or altering an older home’s exterior. Flashing is used underneath the first course above ground level and above all wood trim on doors, windows or shelves. It also is used where exterior stairs and decks attach to a home.
Flashing can be made of composite materials, plastic or sheet metal. Sheet metal flashing is the most durable and is the most expensive of all the choices. Stainless steel or copper can also be used and is a mid-range price. The cheapest alternative is plastic flashing (PVC). However if parts are exposed to sun, wearing can occur faster than the other options.
Weatherproofing is an important preventative approach to protecting one’s home. A professional home inspector can inspect the exterior of home looking for any structural damage or potentially damaging components that need repair.