Roofing flashing what it is?
Roof flashing is a thin metal material that roofers use to direct water away from some regions of your roof (walls, chimneys, roof valleys). No roof can do without it since it is crucial roofing material.
For your roof flashing, you can choose from various metal options. Three types of metals are commonly used: aluminum, steel, and copper.
The most common metal to use for roof flashings is steel. This product offers a clean look that fits most budgets. In terms of aesthetics and durability, copper looks great and will last longer, but it will cost you more upfront. Find out which metal will give you a look you want while staying within your budget by talking to your local roofing contractor.
Purpose of roofing flashing
Although roofs provide homeowners and their families with protection, they can leak and become damaged by water. Flashings are installed when two surfaces meet on the roof, water runoff is heavier, or protrusions (such as chimneys) are present. In addition to roof valleys, chimneys, skylight perimeters, and roof surfaces of dormer walls, problems are likely to occur in these areas.
Types of roofing flashing
Several types of roof flashing are installed in different areas of the roof. There are three types of flashing: step flashing, counter flashing, and apron flashing.
1. The apron flashing
It is used at the base of a wall or penetration to protect it from moisture infiltration. Known as an L-shaped tube, it is 14 feet long and can fit various penetrations.
Water is also prevented from getting into your windows with it around dormers.
2. The step flashing
It is most commonly used on walls and chimneys for step flashings. Every shingle installed on a wall is covered with a piece of metal called flashing to prevent water from running down it.
The term “step” is associated with step flashing because of this. The shingles are installed one at a time, then a piece of flashing, followed by another shingle, then another piece of flashing, until the entire surface of the wall is covered.
3. The counter flashing
A counter flashing is placed on external walls and chimneys like a step flashing. Flashing is installed over a brick rather than a step, sawed into the existing mortar joint with the metal coming over the top.
Step flashing is sometimes installed in a similar way to counter flashing. However, if the flashing is visible, it’s counter flashing.
Is flashing placed above or below shingles?
The headwall flashing that extends down over asphalt shingles is sometimes covered with shingle tabs on asphalt shingle roofs for cosmetic reasons. Flashing should overhang the top covering material.
It may be fastened to the roof deck using two nails and roofing cement. Place the nails on the step flashing piece’s base to nail into the deck. Place the pins high enough to be covered by the following shingles.
Cost of roofing flashing
It costs anywhere from $15 to $25 per linear foot to replace a flashing. There are two components to this cost: the flashing itself, and the caulking used to seal it in place (which can cost as much as $10 on its own). A complete flashing replacement could cost between $300 and $600. It might be enough for you to replace just the flashing around your chimney, which will cost between $200 and $500.
Although a replacement may seem a bit expensive, you must remember that the flashing isn’t the only thing being addressed. To replace the shingles around the flashing, a repair person must remove them, fix or replace them, and seal the flashing. The overall cost will be more significant depending on how many shingles need to be replaced and how long the roof valley is. It is essential to remember that sometimes even the roof’s steepness can affect how much it will cost to repair a flashing.
In addition to replacing one valley, replacing multiple valleys will increase the costs. A trustworthy contractor, however, may provide you with a lower rate per roof valley if you hire him to take care of the repairs, making it more economical to repair all the valleys rather than one by one.