Table of Contents
Nail the siding, stopping before placing the final nail at the end. Slide half of the piece of pan flashing, oriented vertically, under the end of the siding. Make sure the bottom of the flashing does not emerge at the bottom of the lap siding. Secure the flashing and the siding by fastening them to the structure.
Can you install step flashing without removing siding?
Retrofitting Step Flashing Without Removing the Siding Our solution was to cut a 6-1/4″ of the siding away, creating a space to allow the installation of step flashing. We would then cover this space with a removable trim board. The trim board was then installed under and tight up to the drip flashing.
Can you install step flashing without removing shingles?
In order to properly install new flashing, you’ll have to remove the shingles surrounding your old flashing, and then re-lay them after installation. After installation, you’ll then re-lay the shingles you removed, to provide a comprehensive, water-tight solution.
Should flashing go under siding?
In certain instances flashing may need to be installed on the exterior of siding. However, in most instances, step flashing should be installed “behind” siding. It is always recommended to install step flashing behind stucco, Dryvit, wood panel, lap siding, vinyl siding, cedar shingle siding, etc.
How far do you overlap step flashing?
Place each step flashing piece about ¼ inch short of the bottom edge of the shingle that will overlap it — just enough so that the flashing piece is not visible when the overlapping shingle is in place.
How far should flashing go under shingles?
Second, step flashing needs to extend 8 to 14 inches above the shingles, according to the National Roofing Contractors Association (NRCA). Also, before you start installing your flashing, you need to look to see if the wall in question has a corner on the roof face, as in the image below.
Should there be a gap between drip edge and fascia?
The best installation method is to leave a gap between the drip edge and the fascia board, about the width of a finger. The shingles should also overhang the drip edge 3⁄8 to 1/2 an inch.
What is the difference between flashing and step flashing?
Step flashing is primarily used against the sides of walls and chimneys. That’s why the term “step” is used in step flashing. You do it step by step by installing a shingle, then a piece of flashing, then another shingle, then a piece of flashing until the wall is completely protected.
How do you flash the bottom of an exterior wall?
Base flashing. Start by installing a metal or vinyl base flashing first. This piece should be applied directly to the wall sheathing using roofing nails. When more than one length is needed to span across the bottom of a wall, overlap pieces at least 8 inches.
Does flashing go over or under house wrap?
The most important part of weatherproofing begins before the window goes in. After the house wrap is cut, tuck the bottom flap into the house and install sill flashing. Then fold in the sides of the house wrap, but leave the top flap alone.
Should you nail step flashing?
The flashing alternates with the shingles Then sink one nail into the sidewall to hold the step flashing in place. The bottom edge of the flashing should extend just below the nail line. Attach each piece with a single nail high enough to be covered by the next course of flashing, the building wrap, and the siding.
Does step flashing go behind house wrap?
Wrap roof paper up the wall to backup the step flashing. Five inches up the wall is good for 4-inch step flashing. It should be high enough for visual verification that it was done. Cut the house wrap so that the roof paper can be tucked underneath.
How many step flashing do I need?
Step flashing needs to turn up a minimum of three inches up the sidewall. The flashing material should be 4 inches by 7 inches in length when it lies on the roof deck. The 7-inch length ensures a 2-inch headlap on each course. Once complete, the housewrap should overlap the step flashing that’s applied to the wall.
How wide is step flashing?
Step Flashings are generally in 4 by 4 by 8 inch pieces. Step Flashings are used to seal roofing materials into a sloped roof.
How wide should valley flashing be?
Different codes may require different materials, but IKO recommends, as a minimum, a 28-gauge galvanized metal. If not metal, the material must still be corrosion-resistant and non-staining. Also, at a minimum, valley flashing must be 24 inches (610 mm) wide.
Does roofing felt go under flashing?
Installing roof drip edge flashing properly The best way is to install the roof drip edge only along the eaves first, then place ice-and-water barrier (in the snowbelt) or felt paper (underlayment) over the drip edge. This lets any water that gets on the roof run down the underlayment and over the drip edge.
Should roof flashing be caulked?
Roof flashings can be made from thin metal, rubber, and a few other materials. It’s okay to use caulk and roofing cement as a last resort to make a temporary leak repair, but don’t allow a roofer to convince you they’ll work for the long term.
What is the difference between drip edge and rake edge?
It involves the point of application in relation to the underlayment and/or eaves flashing. At the rake edge, the perimeter drip edge metal is applied over the underlayment with the appropriate fasteners secured every eight (8) to ten (10) inches on center.
Does flashing go over or under ice and water shield?
(The drip edge will be installed over the ice and water protector and other underlayments at roof rake edges.) You should install ice and water protector before other underlayments, including roof felt. Around roof features like dormers and chimneys, you should place ice and water protector below flashing.
How far should shingles overhang drip edge?
Asphalt shingles should overhang the exterior edge of the drip edge by ¼ to ¾-inch. Check local building code for drip edge requirements prior to the start of your roofing project.
Do gutters go over or under drip edge?
It is recommended that gutters are placed under or ‘behind’ the drip edge of your roof. If gutters are installed below the drip edge, water can drip behind the gutter and cause damage to the wood supporting the gutter system.
