Table of Contents
What size 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.
How much 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 many steps are in a flashing bundle?
Step flashing directs water back on top of the roofing material preventing water infiltration under the roof. This profile is 4” x 4” x 14”, pre-bent at 90° by the manufacturer for ease of installation. Available in galvanized or pre-painted black, brown, gray and white. This product is sold by the bundle of 25 pieces.
Does step flashing go under shingles?
Step flashing consists of short pieces of flashing, each installed to overlap the shingle in the course below, and to be overlapped by the shingle in the course above. Instead of installing the step flashing between shingles, the flashing rests on top of the shingles.
What is the difference between flashing and step flashing?
The base flashing (or apron flashing) is the bottom piece. Step flashing: Step flashing is a rectangular piece of flashing bent 90 degrees in the center. It is used for roof to wall flashing. Multiple pieces of the flashing will be installed in layers with shingles to ensure the water flows away from the wall.
Can you install step flashing on existing roof?
Step flashing is needed whether a contractor installs new roofing or re-roofs over existing shingles. On re-roofs, the sad case is that contractors do not always take the time to retrofit step flashing because it slows them down, adds cost and additional carpentry work to repair or replace siding.
What is a step flashing kit?
This step flashing kit for deck mounted skylights provides all the parts you’ll need to properly flash your Velux® skylight to your roof. The flashing pieces interweave with the shingle materials to provide excellent water drainage and cover any gaps that might exist.
How thick is aluminum step flashing?
Painted aluminum step flashing and flat shingle products shall be coated on both sides with ACM’s baked on, high performance, Polykote® 3000 paint system that is specifically formulated for residential exterior applications. The nominal film thickness of coatings shall be a 0.70 mil on both sides.
What are the different types of roof flashing?
Roof Flashing Types Continuous Flashing. This is also known as “apron flashing” because it acts in a similar manner to an apron. Base Flashing. Counter Flashing. Step Flashing. Skylight Flashing. Valley Flashing. Drip Edges. Kickout Flashing.
How do you seal flashing to shingles?
Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound, as shown at right. If you are working with valley flashing, lift the edges of the surrounding shingles, and spread roofing cement on the flashing about 6 inches in from the edge of the shingles.
Where should flashing be used on a roof?
Flashing is critical to certain areas of your roof — namely, the places where the roof surface meets a wall (sidewalls and front walls), the low points where two roof slopes meet (called valleys), roof protrusions (bathroom/kitchen vents, skylights) and the roof’s edges (rakes and eaves).
Do you need flashing on a covered porch?
“Flashing is required where exterior porches, decks, or stairs attach to a wall or floor assembly of wood frame construction.
What is another name for roof flashing?
Continuous flashing: Also known as “apron flashing”. Installing one long piece of continuous flashing provides protection to the joint between a vertical wall and a sloped roof. Drip edges: Often installed under the roofing felt along the eaves of a roof. This helps water drip off the roof without damaging the home.
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.
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.
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.
Does step flashing need to be replaced?
Typically, we will replace step flashing when doing a new roof. Also, a new flashing should not be layered over the old flashing. Your roof is supposed to have only one layer of flashing at a time. Installing new flashing is the only way that we can guarantee quality outcomes when replacing your shingle roof.
How much does it cost to put flashing on a roof?
Generally, the cost of fixing flashing is anywhere between $15 to $25 per linear foot, which includes both the price of the new flashing itself and the caulking used to seal it in place (which is about $10 on its own or sometimes more). A total flashing replacement might cost anywhere between $300 to $600.
How does flashing work on a roof?
Flashing is a flat and thin material used to prevent water from entering the openings and cracks of a roof. It is placed underneath the shingles of your roof and it redirects the water to another location. Roof flashing is made from metals, such as copper, aluminum, stainless steel, or galvanized steel.
Is flashing easy to bend?
Luckily, bending flashing to create proper drainage really isn’t hard to do. The metal used for flashing is so thin that it’s super easy to bend by hand or with the help of some basic hand tools. In no time at all, you’ll be bending flashing like the pros.
What is metal step flashing?
Step Flashings are an application method used where a vertical surface intersects with a sloping roof plane. A Step Flashing can be located along a roof slope against a wall or chimney using succeeding courses of flashing material placed in conjunction with layers or courses of roofing materials.
