Federal Way and South King County

Asphalt Shingle Roofing in Federal Way, WA

Architectural and composition shingle roof installation and replacement for Federal Way homes — rated for PNW wind and rain, with moss/algae-resistant options and a written per-square price.

Typical range: $450–$750 roofing square (100 sq ft) installed

Call (253) 652-5284

Asphalt Shingle Roofing underway on a property in Federal Way, WA

Full tear-off, not a cover-up

Permit pulled on every job

Written price before work starts

Never a damaging pressure wash

Old roofing hauled away

Last updated: 2026-08-26

Federal Way Roofing is a roofing company serving Federal Way and South King County, and asphalt shingle roofing is one of the services we handle most. This page covers what the work involves here specifically — the climate, the code, and what it costs — rather than what it involves in general.

What we do on the first visit

The first visit is an inspection, not a sales call. We walk the roof with you, check the deck from the attic side where we can, count valleys and penetrations, and note the pitch and how much staging or safety equipment the job needs. We confirm whether any prior layers are on the roof already — code allows a maximum of two before a full tear-off is required — and then you get a written per-square price with tear-off and any deck repair as separate lines.

If we think repair is the better spend than replacement, or a different material suits your situation better, we say so on that visit — including when it means the smaller job for us.

What's included

On-site inspection and a written per-square price before any work starts
Full tear-off to the deck, not a recover-over-existing job, unless a recover genuinely qualifies under code
Deck inspection and sheathing replacement where moss-driven moisture has caused rot
High-wind-rated architectural shingle options, including algae-resistant (copper-granule) product lines
Synthetic underlayment across the field, ice-and-water membrane at eaves, valleys, and low-slope transitions
New flashing, drip edge, and ridge/hip cap installed to manufacturer spec
A King County or Federal Way reroofing permit pulled as part of the job
Full cleanup and haul-away of the old roofing

What this costs in Federal Way

Asphalt Shingle Roofing runs $450–$750 roofing square (100 sq ft) installed in this area. Reconciled from 2026 Homeyou Federal Way aggregator data and regional contractor-published ranges — see the cost guide for the full breakdown. The things that move a job up its range are tear-off, how much deck repair is needed, pitch, and how many valleys and penetrations your roof has. If you want a number before you call, the roof cost calculator will get you close.

When it needs doing

Shingles curling, cracking, or losing granules in patches
Moss growing under shingle tabs, lifting them
Shingles missing or torn after a windstorm
Roof at or past 20-25 years old
Dark streaking (algae) across north-facing or shaded slopes
Visible sagging or soft spots in the roof plane

DIY patch, the cheapest bid, or the job done properly

	DIY weekend	Cheapest bid	Done properly
Moss removal	Pressure washer — strips granules, drives water under tabs	Quick scrape, no treatment applied	Gentle hand/brush removal plus treatment, gutters cleared
Material grade	Bargain shingle off the shelf, no algae resistance	Standard grade, warranty terms rarely disclosed	Algae-resistant or premium-grade material with a real warranty, disclosed in writing
Underlayment	Whatever’s left over, felt paper reused	Minimum-code synthetic underlayment	High-wind-rated synthetic underlayment, ice-and-water membrane at eaves and valleys
Deck check	Not considered	Skipped unless asked	Checked from the attic side where access allows, repaired if moss has reached it
Permit	Often skipped	Sometimes skipped	Pulled and inspected every time
If it fails	Your weekend, again, now with a worse leak	Chasing a phone number that stopped working	We come back and fix it

How it works

How asphalt shingle roofing runs

01
Free on-site inspection
We walk the roof, check the deck where access allows, and note moss/algae extent. You get a written per-square price before we leave.
02
Permit and material order
We pull the permit and order the exact shingle line, weight, and color — including algae-resistant options if you want to reduce future moss maintenance.
03
Tear-off and install
Deck repaired where needed, underlayment and flashing installed to spec, shingles installed and fastened to manufacturer wind-rating requirements for this region.
04
Inspection and walkthrough
Final inspection, cleanup, and a walkthrough of the finished roof before we leave.

Get a free asphalt shingle roofing estimate

A real person answers. We walk the roof with you, check the deck, and give you a written per-square price — at no charge and with no pressure.

Call (253) 652-5284

Questions

Asphalt Shingle Roofing questions

How long do asphalt shingles last in Federal Way's climate?

Standard architectural shingle typically runs 20-25 years here, often less than its rated lifespan in drier climates because moss and algae growth accelerates granule loss and shingle-tab lifting. Algae-resistant shingle lines and regular moss maintenance meaningfully extend that.

Is algae-resistant shingle worth the extra cost?

Usually, yes, for this climate specifically. Copper-granule algae-resistant shingles cost somewhat more upfront but measurably slow the moss/algae growth that's the dominant failure driver here — it's one of the few upgrades with a clear climate-specific payoff.

Can you recover over my existing shingles instead of a full tear-off?

Sometimes, if code allows (one existing layer, sound deck) — but we're cautious recommending it here specifically, because a recover can't address moss-driven deck damage hiding underneath. We'll tell you honestly which situation you're in at the inspection.

Do you offer financing or phased payment?

We don't currently offer in-house financing. We give you a complete written price upfront so you can arrange financing through your own bank or lender if needed before work starts.

Do you charge for an estimate?

No. Estimates are free across Federal Way and South King County, including the drive. We walk the roof with you, check the deck from the attic side where we can, and hand you a written per-square price with tear-off and any deck repair broken out as their own lines.

Also worth a look

Related services

Cedar Shake Roofing

Cedar shake installation, re-roofing, and moss-driven shake replacement for Federal Way's older housing stock — built around the maintenance cadence this material actually needs in a wet PNW climate.

Roof Replacement

Full tear-off roof replacement for Federal Way and South King County homes and businesses — asphalt shingle, cedar shake, flat/low-slope, or metal, matched to your roof and budget, with a written price before any work starts.

Roof Moss & Algae Treatment

Gentle moss removal and algae treatment for Federal Way roofs — the single most common roofing problem in this climate, handled in a way that extends your roof's life instead of damaging it.