What is the function of a head flashing over a window?
Mike Guertin: Head flashing prevents water from seeping into the joint between the bottom edge of the siding and the top of the head trim. You won’t necessarily find flashing on windows and doors that have integral flanges because some manufacturers require it and others don’t.
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Does the flashing have to go under the siding?
In certain cases, it may be necessary to install flashing on the outside of the siding. However, in most cases, step flashing should be installed “behind” the siding. Installing step flashing behind stucco, Dryvit, wood panel, lap siding, vinyl siding, cedar shingle siding, etc. is always recommended.
What type of flashing does Windows use?
Various types of flashing can be installed on a window. The three main types of window flashing are drip cap, flashing tape, and molded vinyl, with each type fitting a different part of the window.
Why do I need to flash in my window?
Flashing is an essential component of proper window installation. Catches rain blowing at an angle on your home. Siding is not enough protection between your house and the rain and moisture that occurs outdoors, so you need to put an additional barrier between your window and the siding.
Can a window be covered to prevent moisture?
Installing flashing shouldn’t be an option, but some contractors overestimate the effectiveness of the siding in preventing moisture from entering openings around the window. Other contractors install flashing but fail to properly integrate it with the water-resistive barrier.
How much space do you need for window flashing?
Most siding and window manufacturers require a 1/4-inch gap. to 3/8 in. between the top flashing and the bottom edge of the siding directly above it. This space prevents it from seeping into the cut edge of the siding and creates an outlet for water that may have gotten behind the siding or WRB somewhere above the window.
Can a building inspector check windows for flashing?
Flashing is an important part of window installation, and setting up windows can be tricky, so it’s best to leave the entire process to professionals. Depending on the rules in your community, a local building inspector can verify that your flashing (along with all aspects of window installation) meets local building codes.
Where is the flashing on the window frame?
Looking at the trim above the window, you will not see this piece of metal. This flicker is sometimes called a z flicker, because it is shaped to look like the letter z in profile. One edge of the z passes under the wall cladding. The center part of the z is at the top of the trim.