Flashing and roof transitions

Where a Camas roof replacement succeeds or fails: the transitions

Open field shingles rarely cause trouble on a newer roof. Leaks usually start where the roof changes direction or meets something else: a wall rising above a lower roof, a chimney, a skylight, a dormer, or a valley where two roof planes meet. Those transitions depend on metal flashing and membranes layered so water is always directed out and down, over the shingles below.

This matters for your decision because two estimates can list the same shingle and still deliver very different roofs. One contractor may plan to bend new step flashing into every course along a sidewall. Another may plan to reuse the existing metal and seal it with caulk. Both proposals say “new roof,” but only one renews the parts most likely to leak.

Reusing flashing is not automatically wrong. Some counterflashing is set into masonry or tucked behind siding, and removing it can mean extra siding or chimney work. The point is that you should know which approach is planned, why, and what it costs. When the old roof is opened, rusted, bent, or short flashing is easier to see, so a scope should also say what happens if what was assumed reusable turns out not to be.

On many two-story homes, the most important line is where the second-floor wall meets a lower roof over a porch or garage. At the bottom of that wall, a kickout (diverter) flashing turns water into the gutter instead of letting it run behind the siding. When it is missing, the damage often appears as rot in the wall below rather than as a ceiling stain, which is why it is worth asking about by name.

Flashing questions to ask about your Camas estimate

Will step flashing along sidewalls be replaced, or reused? Why?
How will chimney flashing be handled — new step flashing plus counterflashing, and is a cricket needed behind a wide chimney?
Are kickout flashings planned where a roof edge ends against a wall?
What lines the valleys — metal, membrane, or woven shingles — and does that follow the shingle maker’s instructions?
Are skylights being reflashed with a kit made for them, or replaced?
Where will self-adhering membrane be used, and where standard underlayment?
If siding or trim has to be loosened to reach wall flashing, who handles it, and is that priced?

Repair or replace

Repair the flashing, or replace the roof?

A leak at a chimney or sidewall is often a flashing problem, not a sign that the whole roof is finished. The answer depends on the condition of the roofing around the leak and on how many problems the roof has.

Often still a repair

The leak traces to a single chimney, skylight, or wall, and the shingles around it still lie flat and hold their granules
The flashing itself is damaged — a lifted counterflashing or a cracked pipe boot — and can be replaced without disturbing much of the roof
The roof is fairly young and the rest of it shows no widespread wear

Points toward replacement

Several transitions are leaking or have been patched repeatedly, and the shingles across the roof are brittle or worn
Fixing the flashing properly would mean removing and replacing large sections of shingles that will not lie back down well
An inspection finds soft decking near multiple walls or valleys, suggesting long-term water entry

Moss, stains, or a roof’s age alone don’t settle the question, and remaining life can’t be promised from a photo. An on-site roof inspection is the way to know. See also roof repair vs. replacement.

Scope

What a complete Camas roof replacement scope should address

A full tear-off lets every transition be rebuilt from the deck up. The written scope should identify the flashing locations on your roof and say how each is handled, then cover the rest of the system: decking review once exposed, underlayment, membranes where specified, drip edge, pipe boots and vents, ventilation, the shingle line and color, and cleanup. Decking that is damaged is photographed and reviewed with you before it is replaced, at the unit price stated in the estimate.

Permits: requirements depend on the city or county with authority over the property — which isn’t always the city in the mailing address — and on the scope, such as whether sheathing or framing is replaced. Ask whether your project needs a permit and who will obtain it before work is scheduled.

Items your written scope should cover

Tear-off of existing layers down to the deck, with disposal
Decking review after exposure, with a stated per-sheet price
Step flashing at sidewalls and dormer walls
Chimney flashing and counterflashing, and a cricket where needed
Kickout flashing where roof edges end at walls
Valley treatment and membrane locations
Skylight reflashing or replacement
Drip edge, pipe boots, roof vents, and ridge

Cost factors

How flashing affects Camas roof replacement cost

The size of the roof itself — not the square footage of the house — sets the baseline for materials and labor. From there, pitch, access, the number of layers to remove, and complexity move the price. Each wall line, chimney, skylight, and valley adds metal, membrane, cutting, and time. A simple gable roof with one vent stack and a roof with several dormers and a chimney can be the same size and still price very differently.

Concealed conditions are the other variable. Decking under an old chimney or along a wall that has leaked for years cannot be fully judged until the old roof is removed. That is why the decking price is stated per sheet instead of guessed. We do not publish standard prices, because the same size roof can require very different work.

More detail: what affects roof replacement cost and what a roofing estimate should include.

Compare Camas estimates line by line

Is flashing listed by location, or folded into “materials”?
Does each estimate assume new or reused wall and chimney flashing?
Is the decking price stated per sheet, and how is extra work approved?
Are the shingle line, underlayment, and membranes named?
Who handles siding or trim that must be loosened?
What workmanship coverage applies, and what does the manufacturer cover?

Process

How a Big Bear roof replacement runs

On-site estimate
A roofing specialist walks the roof, checks shingles, flashing, and ventilation, takes photos, gathers measurements, and emails you a detailed estimate.
Review and sign
You go over the written scope and options. When you are ready, you accept the estimate online with an e-signature and we schedule the installation date.
Tear-off and installation
The crew protects the property, removes the old roof, reviews the decking with you where repairs are needed, and installs the new roof system.
Cleanup and follow-up
Debris is hauled away, the property is checked for nails and scrap, and you receive follow-up messages and photo documentation of the work.

Preparing your Camas home for the work

A little preparation keeps the transitions accessible and the project on schedule.

Note where you have seen stains, drips, or damp drywall, especially below walls and chimneys
Tell us about past flashing repairs or chimney work, and when they were done
Clear patio furniture and planters away from the walls under roof transitions
If a chimney is no longer used, decide whether you want removal discussed in the estimate
If your neighborhood has an HOA, check its shingle color rules before choosing a product

The roof as a system

What goes into a complete new roof

Big Bear focuses on steep-slope asphalt shingle roofs, including architectural shingles and designer lines such as GAF Grand Sequoia. We don’t install flat or low-slope roofing. Exact components depend on your roof’s design, applicable code, and the manufacturer’s instructions.

Decking

The plywood, OSB, or board sheathing the roof is fastened to. It is checked once the old roof is off.

Underlayment and membranes

A water-resistant layer over the deck, with self-adhering membrane at vulnerable areas where specified.

Flashing

Metal at walls, chimneys, valleys, and skylights that turns water back onto the roof surface.

Roof edges

Drip edge at eaves and rakes, and starter courses that seal the first row of shingles.

Penetrations

Pipe boots, vents, and other openings, each sealed to suit the new roof.

Shingles

Architectural or designer asphalt shingles, installed to the manufacturer’s instructions for your roof’s pitch.

Ventilation

Intake and exhaust that suit the attic. What a given roof needs depends on its design, code, and the manufacturer.

Straight-down drone view of a new charcoal-gray shingle roof with hips, valleys, dormers, and a chimney — Hips, valleys, dormers, and a chimney on a Big Bear Exteriors roof replacement in east Vancouver, WA.

Who you’re working with

Big Bear Exteriors serves homeowners in Camas, WA from our office at 1104 Main St, Ste 610, Vancouver, WA.

Washington L&I # SERDEGL826PD · Oregon CCB # 239429
Licensed general contractor in WA & OR · Bonded & insured

You can check our registration with Washington L&I. How our workmanship coverage and manufacturer warranties differ is explained on our warranty page.

Nearby service areas

See residential roof replacement or all service areas. Not sure about your address? Contact us.

In Camas

From Big Bear customers in Camas, WA

“We hired Big Bear Exteriors for a roof replacement and new gutters on our Camas home. Communication was easy, and we knew what to expect at each step. The roof and gutters look great together, and the crew left the driveway and landscaping clean when they finished.”

Daniel K.Camas, WA · Roof Replacement & Gutter Installation

FAQ

Roof replacement questions from Camas, WA homeowners

Does a roof replacement include new wall and chimney flashing?

It should be addressed, but proposals differ. Some replace all step flashing and chimney flashing, while others reuse metal that is set into masonry or tucked behind siding. Ask each contractor to say in writing which flashing will be replaced, which will be reused, and why. Masonry repairs to the chimney itself, such as repointing, are usually a separate trade.

What is a kickout flashing, and does my Camas home need one?

A kickout flashing is a small diverter at the bottom of a wall where a lower roof edge stops. It sends water into the gutter instead of behind the siding. Homes where a two-story wall meets a porch or garage roof often need one. If yours is missing and the wall below shows soft trim or stained siding, mention it during the estimate.

Can flashing be fixed without replacing the roof?

Often, yes. A single leaking chimney or skylight on a roof that is otherwise in good condition can usually be reflashed as a flashing repair. When several transitions are failing and the shingles are worn, replacement usually makes more sense than repeated repairs.

Should my skylights be replaced at the same time as the roof?

If a skylight is older, fogged, or has leaked, replacing it during the reroof avoids cutting into new shingles later. A skylight in good condition can be reflashed instead. We can talk through both options as part of the estimate. See skylight replacement and repair.

Roof Replacement in Camas, WA