Toledo Roofers: Article About The Importance Of Roof Flashing
Roof valleys are any area of a roof where two separate roof structures meet, thereby creating an inward angle. Valleys are common whenever there has been a room addition and in homes that contain an attached garage.
Toledo roofing experts answer a commonly asked question: How often should roof flashing be replaced?Roof flashing should be replaced whenever it becomes bent, worn or rusted, as it can no longer serve its useful purpose. Flashing should always be replaced when installing a new roof, as old flashing may no longer fit well around openings or in valleys. When properly installed, roof flashing can last as long as the roof itself.
When installing a new roof, flashing is sometimes needed in certain areas. Flashing provides additional protection from leaks in areas that are vulnerable to expansion, contraction or the accumulation of precipitation such as ice and snow. Without the right flashing, a roof could be susceptible to leaking, which reduce its lifespan significantly.
One common area where flashing is used is around protrusions such as chimneys, skylights and roof vents. The reason why flashing is needed in these areas is that their intersections tend to move over time, expanding and contracting with changes in the temperature or humidity level. Over time, this can result in gaps that would allow moisture to enter and compromise the structural integrity of the roof.
Flashing is sometimes used in roof valleys as well. Toledo roofers may recommend it to prevent problems that are caused whenever snow and ice melts and then refreezes, causing the shingles underneath them to move and possibly tear. Flashing in roof valleys provides additional protection while also helping precipitation move off the rooftop more freely.
Homeowners may also need flashing on any area of their roof where two different edges meet. Examples are dormer windows, peaks and ridges. Whether or not flashing is needed will largely depend on the roof's configuration and pitch.
The roofing experts from Johnson Roofing of Toledo would be happy to answer any questions you have about commercial roofing or residential roofing.
A general rule is that any time there is a penetration of the roof's surface, flashing should be used to ensure the area is properly sealed.
When flashing is placed along the bottom edge of a roof, it is referred to as a drip edge. The purpose for placing flashing in this area is to prevent moisture from seeping in underneath the edge of the shingles and causing damage to the underlayment. This is a common problem when ice and snow build up on a roof.
Numerous materials can be used in making flashing; however, the most common ones are aluminum or galvanized metal. Aluminum is generally preferred because it is lightweight, long lasting and rustproof. It also blends well with nearly any type of shingle and is easy to install. Many contractors prefer aluminum because it is easy to bend into the shape desired.
Flashing is typically installed with the use of nails and may require additional layers of protection underneath. Installation is finished whenever a protective sealant is applied to the flashing to ensure no water can get underneath it. Properly installed flashing will ensure a roof provides adequate protection for years to come.
