Dan Morrison | March 20, 2018

Jobsite Handbook // Roofing, WRB & Flashing

Roof Flashing Guide: From Drip Edge to Valley Flashing

Drip edge metal, valley flashing, dormer, chimney, and kickout flashing shed water away from the connections between roofs, walls, chimneys, and other building assemblies


This collection of 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

details // Roofing, WRB & Flashing

Two Ways to Flash Roof Edges

Protect the eave from ice dams and sideways rain

details // Roofing, WRB & Flashing

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  

details // Roofing, WRB & Flashing

Dormer Flashing Details in 4D

Concentrate on the corners and think like water when overlapping the layers  

details // Roofing, Siding & Exterior Trim, WRB & Flashing

Kickout Flashing That Won't Leak

Ground zero for roof rot is often where roofs meet walls.

details // Concrete & Masonry, Roofing, WRB & Flashing

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...  

details // Roofing, WRB & Flashing

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 water away

YouTube // Roofing, WRB & Flashing

How to Flash a Masonry Chimney Into a Metal Roof

A silent movie about flashing metal roofing into a brick chimney from UnionCorrugating.

JOBSITE KNOWHOW: Roof flashing videos

Video // 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.

Video // Roofing, WRB & Flashing

Flashing A Humpy Old Roof Valley

Flashing a humpy old roof valley requires a little give and take, and a backup plan

Video // Roofing, WRB & Flashing

Installing Drip Edge on a Humpy Old Roof

Dealing with dips and making clean overlaps

YouTube // Roofing

Open Metal Valley Details for Asphalt Roofs

Open metal valley flashing plus ice & water membrane - your whole roof will perform better  

BACKGROUND RESEARCH: Roof flashing articles and podcasts

Article // Roofing, Siding & Exterior Trim, WRB & Flashing

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.

Article // WRB & Flashing

Low Slope Roofing: Troubleshooting in Advance

Use membranes, drain to an open edge, slope everything, and read the *darned* manual(s)

Article // Roofing, WRB & Flashing

Best Practices for Steep-Slope Roofing

Sweat the details or you'll drown in them

Article // Roofing

Kickout Flashing Keeps Water Out of Walls

Rain should run off the roof and into the gutter. 



Roof Flashing in the Building Code: