Roofing

Roof Flashing Guide: From Drip Edge to Valley Flashing

Drip edge metal, valley flashing, dormer, chimney, and kickout flashing are types of roof flashing that shed water away from the connections between roofs, walls, chimneys, and other building assemblies
Dec. 25, 2018
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Drip edge metal, valley flashing, dormer, chimney, and kick-out flashing shed water away from the connections between roofs, walls, chimneys, and other building assemblies

This collection of 18 articles, animations, and videos identifies the critical roof flashing areas, illustrates durable roof flashing details, and shows how to flash roofs right in the real world.

SIZE UP THE JOB: Roof flashing animations

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Roofing

How to Flash an Open Valley with W-Type Valley Metal

Roof valleys are like gutters with a steep pitch, but the stakes are higher for valleys than they are for gutters
March 12, 2020
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Concrete & Masonry

Step Flashing 2 Brick: Its Complicated

Flashing must extend all the way from the wall to the outside. Oh yeah, and it has to be watertight and eight people have to work on it...
Sept. 1, 2022
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Roofing

Galvanic Corrosion Explained

Contact between dissimilar metals – like copper fittings threaded into steel pipe or copper flashing fastened with steel nails – sets up an electro-chemical reaction that causes...
Oct. 28, 2019
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Roofing

Storm Proof Roof (2): Edge Flashing and Starter Strip

Roofs peel off from the edges, so it is critical to hold them tight
May 22, 2018
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Roofing

Flashing a Wood-Framed Chimney w/a Copper Cricket Cap

Flashing a wood-framed chimney is like flashing a dormer, except there’s no roof behind it. Without protection, water can leak into the joint and rot your walls to direct uphill...
Aug. 22, 2024
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Roofing

Kickout Flashing That Won't Leak

Ground zero for roof rot is often where roofs meet walls.
Sept. 20, 2016
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Roofing

Two Ways to Flash Roof Edges

Protect the eave from ice dams and sideways rain
June 27, 2016
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Roofing

How to Flash a Masonry Chimney Into a Metal Roof

A silent movie about flashing metal roofing into a brick chimney from UnionCorrugating.
Sept. 19, 2017
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Roofing

Dormer Flashing Details in 4D

Concentrate on the corners and think like water when overlapping the layers
Oct. 29, 2016

JOBSITE KNOWHOW: Roof flashing videos

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Roofing

Slipping (Sticky) Roof Membrane Under Existing Step Flashing

A three-foot stick can hold a section of step flashing out of the way while you work the membrane into place.
March 9, 2023
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Roofing

Drip Edge Installation on an Existing Roof

A look at types of drip edge flashing, how to cut it, and how to retrofit it to an existing roof​
March 2, 2023
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Roofing

Weatherization Nation 6: Roof Dry-In, Flashing, and Underlayment

Protect the edges from sideways rain, and overlap like you've done it before!
Feb. 24, 2023
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Roofing

How to Reflash a Leaky Skylight

Flashing is the key to a skylight that won't leak water into the roof
Nov. 5, 2018
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Roofing

Overlap Drip Edge Metal Like A Boss

A drip edge overlapping strategy that won't catch the eye
July 9, 2018
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Roofing

Peel and Stick in a Valley—Wait, Nail It?

Drive a nail in the valley and patch it
Jan. 22, 2019
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Roofing

Sheet Metal Secrets: Drip Edge Flashing (jobsite origami)

How to bend a lock-hem drip edge on a sheet metal brake
Jan. 17, 2018
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Framing

Decking A StormProof Roof (4 of 4): Sealing the Seams

Tape layers should overlap shingle-style up the roof
June 19, 2018
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Roofing

Open Metal Valley Details for Asphalt Roofs

Open metal valley flashing plus ice & water membrane - your whole roof will perform better
Nov. 17, 2016
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Roofing

Flashing A Humpy Old Roof Valley

Flashing a humpy old roof valley requires a little give and take, and a backup plan
Nov. 27, 2015
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Roofing

Installing Drip Edge on a Humpy Old Roof

Dealing with dips and making clean overlaps
Nov. 20, 2015

BACKGROUND RESEARCH: Roof flashing articles and podcasts

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Construction Phase

Low Slope Roofing: Troubleshooting in Advance

Use membranes, drain to an open edge, slope everything, and read the *darned* manual(s)
Oct. 7, 2021
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Concrete & Masonry

Architectural Projections: 7 Minutes of BS

Old Building Details That Work
Aug. 8, 2017
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Framing

Homebuilding Smackdown: Science vs. Hurricane

The top reason to study engineering in college: Wall of Wind. Yay Science!
Jan. 6, 2018
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Construction Phase

When Drip Edge Becomes A Double Agent

The mission of water is to turn houses to mush. Some drip edge flashings may actually help water accomplish this mission.
Dec. 23, 2016
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Siding & Exterior Trim

Drip Edge Flashing: 7 Minutes of BS

Drip edge is another water-shedding tool
Jan. 2, 2018
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Roofing

Best Practices for Steep-Slope Roofing

Sweat the details or you'll drown in them
March 11, 2016

About the Author

Dan Morrison

Dan Morrison is a founding editor of ProTradeCraft.com, where he is also the editor-in-chief. Fun fact: Dan is also a founding editor of Green Building Advisor and executive editor of Fine Homebuilding.

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