How to Flash a Porch Addition
- Put on a pair of leather-palm gloves to avoid injuries from the sharp edges of the metal flashing.
- Flash the corner first, if applicable.
- Lay the cut flashing down at the corner over a shingle that is already in place.
- Caulk the edges of this piece where they meet both the roof and the side of the house on the corner. ...
- Lay down another piece of flashing...
Full Answer
Does flashing go above or below shingles?
Flashing should overlap the roof-covering material, but on asphalt shingle roofs, for aesthetic reasons, the part of the headwall flashing that extends down over asphalt shingles is often covered with a course of shingle tabs.
What is porch flashing?
Step flashing uses rectangles of metal, usually pre-bent steel or easily manipulated aluminum, that effectively seals the gap between the porch addition and the house side. Step flashing is installed in conjunction with shingling the porch roof.
How is flashing installed?
2:233:34How to Install Flashing on a Roof | Mastering the Roof by GAF - YouTubeYouTubeStart of suggested clipEnd of suggested clipPlace the first step flashing strip over the end of the starter course shingle and secure. The stepMorePlace the first step flashing strip over the end of the starter course shingle and secure. The step flashing to the roof with 2 nails.
What does step flashing look like?
0:118:41How To Shingle - Step Flashing - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo step flashing is basically a right-angle piece of metal could be galvanized could be coloredMoreSo step flashing is basically a right-angle piece of metal could be galvanized could be colored whatever that would go against anywhere we're roof butts into a wall such as we have here.
Do I 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 the best material for flashing?
What Are the Best Materials Used for Roof Flashing?Aluminium. Aluminium is a durable, versatile material and is suitable for numerous flashing locations, including in the valleys, around the chimney and at the walls or step-up areas. ... Copper. For a pricier, highly durable flashing option, turn to copper. ... Stainless Steel.
How much does it cost to add flashing?
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.
What is the process of flashing?
When the local pressure of fluid is reduced below the vapor pressure of fluid, vaporization will begin. In the process industry, if fluid local pressure does not recover above fluid vapor pressure, the fluid will remain in the vapor phase. This process is known as flashing.
Does flashing go under siding?
Step flashing is used where a roof and wall intersect. It's installed behind the siding and underneath the roofing material.
What's the difference between flashing and step flashing?
The base flashing (or apron flashing) is the bottom piece. Counter-flashing: Placed opposite to base flashing, or above base flashing, counter-flashing completes the two-part team. Step flashing: Step flashing is a rectangular piece of flashing bent 90 degrees in the center. It is used for roof to wall flashing.
Is there an alternative to step flashing?
Counter flashing is used on walls and chimneys like step flashing. Unlike step flashing, the piece of flashing is sawed into an existing mortar joint, and the metal comes over the top of the brick. Like step flashing, counter flashing is sometimes installed in a step-by-step method.
What are the different types of flashing?
Each piece of flashing should always overlap to clearly direct water toward gutters. Some types of roof flashing are counter flashing, chimney flashing, step flashing, headwall flashing (also called apron flashing), valley flashing, and gutter apron flashing.
What is the purpose of a flashing?
In modern buildings, flashing is intended to decrease water penetration at objects such as chimneys, vent pipes, walls, windows and door openings to make buildings more durable and to reduce indoor mold problems. Metal flashing materials include lead, aluminium, copper, stainless steel, zinc alloy, and other materials.
What is the purpose of flashing on a deck?
Deck flashing creates a barrier to prevent moisture from entering the house in the openings you create when attaching your ledger board connection. You can buy flashing either in roll form or in rigid Z- or L-shaped 10' sheets made of stainless steel, copper or vinyl material.
What are the different types of flashing?
Each piece of flashing should always overlap to clearly direct water toward gutters. Some types of roof flashing are counter flashing, chimney flashing, step flashing, headwall flashing (also called apron flashing), valley flashing, and gutter apron flashing.
What does flashing mean on a house?
As all builders know, flashing is a thin sheet or strip of water-resistant material that's installed at roof intersections and projections, around windows and doors, and along the tops of foundation walls to direct water flow away from the home. Flashing guides water out from the drainage plane to the exterior.
What is Porch Roof Flashing Installation?
Roof flashing installation involves adding a flashing material on the gaps between the roof of a porch addition and the sidewall of a house. You’ll install step flashing along with the porch’s roof shingles. That will ensure that water flows away from the wall.
How does roof flashing prevent leaks?
Roof flashing installation should help to prevent leaks by sealing the junctions between the porch roofs and the adjacent walls. When installed incorrectly, the flashing may still allow water to leak into the house. So how can you install porch roof flashing properly?
What to know before installing flashing on a roof?
Before selecting any of the roof flashing materials, check if the local building codes allow you to install the material of your choice. Some building codes may specify the materials for flashing in their regions and the minimum thickness required.
What is angle cut on a roof?
The purpose of the angle cut is to allow one part of the flashing to rest flat on the roof while the curt part wraps around the house corner. It’s a freehand cut, and you may try severally before the flashing piece rests on the roof correctly.
Where does the bend on the flashing fit?
The bend on the flashing will fit automatically into the joint where the porch roof meets with the wall of the house.
What is the best material for flashing?
There are several flashing materials on the market, including copper, galvanized metal, and aluminum. However, most DIY homeowners prefer aluminum as it is easy to install.
How long is a porch flashing?
Generally, most flashings come in sections, each measuring 10-feet long. If your porch-roof joint is longer, you’ll have to join two pieces together to fit the entire length.
Why is my porch roof leaking?
If you have problems with your porch roof leaking, it is often due to poorly installed flashing or a lack of flashing altogether . Flashing is a thin strip of weatherproof material installed to deflect water from seals and joints to protect your porch and home from damage.
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Is flashing hard to install?
Flashing can be difficult to install, so make sure you are following the directions carefully and taking your time.
How does housewrap work?
1. Housewrap creates the foundation. Ideally, I like to start by installing a 3-ft. by 3-ft. sheet of housewrap (or even better, a piece of self-adhering roof underlayment) to the wall before the first truss or roof rafter is placed against it. The sheet acts as a backup at a vulnerable junction.
Why do I use flashing in my house?
I use redundant layers of flashing integrated into the housewrap to keep water from getting behind exterior cladding. Kickout flashing directs water into the gutter. The process might seem overcomplicated at first, but the minor expense in time is much better than having to tackle rot repairs down the road.
How to protect metal flashing?
Although flexible flashing tape is pretty durable, it’s best to protect it with metal flashing and to treat it as a backup for water leaks. I fold a piece of metal flashing for the inside corner between the subfascia and the wall. A vertical cut about 2 in. to 3 in. long helps it to fold onto the roof sheathing. I then add a second piece of flexible flashing tape to cover the open corner of the metal flashing, and I fold it down onto the subfascia.
What size flashing should I use for a 5 in roof?
9. Bigger step flashing is better. I recommend 12-in.-wide step flashings bent for a 5-in. roof leg and a 7-in. wall leg. The narrower step flashing just isn’t wide enough to protect the intersection fully.
How much does a dryflekt diverter cost?
The model I’m using is made by DryFlekt ( www.dryflekt.com ); it costs about $11 and is available in right- or left-hand models in white, ivory, or brown plastic. (Prefabricated copper versions are on the market, too, and cost about three times as much.) I line up the inside corner of the diverter 1⁄2 in. to 3/4 in. lower than the edge of the drip edge-essentially equal to the distance you overhang the first course of shingles.
How far down should I put housewrap?
If I can’t get some sort of weather barrier against the wall at the end of the eave, I apply a piece of housewrap that runs vertically from just below the soffit to at least 3 ft. down the wall, 6 in. horizontally around the inside corner, and at least a foot beyond the end of the eave.
Can I retrofit a kickout?
I retrofit kickouts all the time. Doing so involves removing the siding in the area and perhaps going further to remove some roofing and some of the housewrap in order to get laps for positive drainage.
How does flashing work on a roof?
This flashing safeguards the house structure below the roof by directing water run-off away from the sidewall of a dormer or chimney into the gutters. It is installed in “steps” (ascending a slope like steps) with layers of shingles in between each piece of flashing.
What does it mean when shingles curl?
The shingles are curling, broken, damaged, have lost granulation, or are missing (which denotes that water is draining under the shingles). The asphalt or wood shingles are moldy, decaying, or splitting. Patches, cracks, or tears in the roof. The flashing itself tears or buckles around the roof features.
Why do you need to inspect your roof?
In order to avoid roof flashing issues and greater house damage, it would be best to have a professional inspect the roof on a regular basis, especially after harsh and extreme weather events.
What is counter flashing?
is the second type of flashing used with base flashing. It is typically applied to chimneys during new construction projects or complete roof replacements. For all chimney re-flashing projects, counter flashing is applied after the base flashing and step flashing have already been installed.
How wide should a step flashing be?
The width of the step flashing over the roof deck must be at least inches wide.
Why do we need flashing on the roof?
Flashing closes the joints between the roof and the roof features in order to protect the house from erosion and leaking. A lack of flashing or poor flashing installation can also lead to wood rot, potential shingle damage, or deck collapse, among other issues.
Where is drip edge flashing installed?
Drip edge (flashing) are installed at the edge of a roof to direct the water run-off from the shingles into the gutter, or away from the fascia (the wood below the shingles) if the gutter is not present. There are three types of drip edge flashing:
