Greenwich Roofing: Article About What Is Flashing?
Flashing is perhaps the most technical part of roof installation. It provides a watertight seal of the joints in roofing and other parts of the building. The roof itself has many joints that, if not properly sealed, can and will invite water into the building. Because of the nature of humidity and outside temperature, the opening at the point of different joints can fluctuate. The flashing helps to provide a seal around this joint, providing protection against all water and moisture.
The roofline and other exterior elements of a building work together to create a virtual cocoon of protection against outside weather. These elements all create joints where water can penetrate. Because water poses the biggest threat to the interior of a building, sealing off these joints is a top priority. Flashing provides this protection at multiple joints, but especially on the roofline. Consulting with a Greenwich roofing contractor about the type of flashing used is a good way to ensure that the roof will offer peak protection.
While the installation of flashings is somewhat more technical, the material itself is relatively simple. Flashings are most often metal strips that can easily be welded or molded.
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Aluminum, for example, is a poor metal for flashing because it is difficult to solder. The ideal metal for flashing should also be resistant to corrosion. The two main types of flashing are base flashing and cap flashing. Cap flashing is often connected to the wall, while base flashing is attached to the roof itself.
Depending on the roof, the flashing may be applied differently. The desired result of flashing should always be a complete seal and protection of the joint from water. While base flashing may be worked into the sheathing of the roof, cap flashing follows the slope of the roof in steps. If not installed properly, the flashing will bind and not provide adequate protection of the joint.
Sometimes, just as with the roof itself, repairs may be necessary to prevent leaks. Well installed flashing should last the full life of the roof, and if they are in need of repair, it may be advisable to look into the overall quality of the roof. Even a smaller problem could require a replacement of a section of the roof. For this reason, only qualified roofing professionals should install flashing on the roof area. Using high quality flashing with expert installation is the best way to fully protect a building from water leaks.