James Hardie ColorPlus vs Primed: the Real Cost Difference on Seattle Homes
On our Seattle-area jobs, James Hardie ColorPlus lands about $1–2 per square foot above primed-and-painted Hardie, installed. A field repaint runs $3–4 per square foot 10–15 years in, so ColorPlus usually wins the 20-year math — primed wins when you want a custom color or plan to repaint anyway.
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ColorPlus SpecialistGP General Corp installs James Hardie both ways on real Seattle, Eastside, and Snohomish County homes — factory-finished ColorPlus and primed boards field-painted with Sherwin-Williams Duration. James Hardie Select Contractor, WA license GPGENGC830KD, MBAKS member, rated 5.0 on Google. Straight pricing for both options on every written quote — see our current rates.
By Paul Gubenya, Owner — GP General Corp
What Homeowners Say
Real reviews from our Google profile — unedited, from real projects.
“We recently had Paul with GP General repair a damaged corner protector and sidings. His estimate was reasonable, his availability was timely, and his job was excellent. Our home hadn’t been re-painted in a while and the paint had considerably faded, yet he was able to match the color perfectly. Now we know who to turn to when in need of another repair work.”
“GP General replaced LP siding on our garage. Paul was very thorough when he came out to do the estimate; he listened to my concerns and was able to work out solutions on the spot. His crew did a great job and were very courteous. They also were careful about cleaning up (I didn’t find any nails!). Really happy with the job and can recommend GP General.”
“I highly recommend GP General Corp for siding replacement. We recently had our wood siding replaced with James Hardie lap siding, and Paul and his team did an excellent job.”
The Short Answer
Both options are the same board underneath — James Hardie HZ10 fiber cement, engineered for the Pacific Northwest. The choice is only about the finish: baked on at the factory, or sprayed on your walls after install. Here is when each one wins:
Choose ColorPlus when…
- You want the finish warranted for 15 years — paint and labor
- Your project installs in fall or winter (no painting-weather wait)
- You plan to keep the house 10+ years and want the lower 20-year total
- One of Hardie’s ~two dozen standard colors works for you
Choose primed + painted when…
- You want an exact custom color (any Sherwin-Williams formula)
- You’re matching existing trim, a historic palette, or HOA-specific color
- You expect to repaint on your own schedule anyway
- Day-one budget is the constraint — it starts about $1–2/sq ft lower
What “ColorPlus” and “Primed” Actually Mean
ColorPlus is Hardie’s factory finish: multiple coats of proprietary paint applied to the fiber cement in a controlled plant and oven-cured before the boards ever see a truck. The result is a consistent film with no brush marks, no weather during application, and a finish James Hardie warrants for 15 years against peeling, cracking, and chipping — covering both the paint and the labor to fix it.
Primed Hardie is the same board shipped with a factory primer only. Your installer hangs it, caulks and flashes it, and a painter sprays the color on site. On our jobs that means two coats of Sherwin-Williams Duration — a top-tier acrylic we spec because it holds up in Puget Sound weather. The finish quality then depends on three things Hardie can’t control: the paint, the prep, and the weather on spray day.
Every other part of the job is identical — same HydroGap weather barrier, same flashing details, same HZ10 install system.
The Real Cost Difference on Our Jobs
National blogs quote a $2–3/sq ft premium for ColorPlus. On our actual Seattle-area installs it’s tighter than that: ColorPlus typically lands about $1–2 per square foot above the primed-and-painted route, all-in. Our standard HardiePlank lap install with ColorPlus runs $14–20/sq ft depending on the house; going primed + field-painted usually comes in about $1–2/sq ft under that once painting labor is counted.
Day one, primed wins. The 20-year picture is different, because a field-painted house needs its first full repaint somewhere in years 10–15 — and a quality exterior repaint on smooth siding runs $3–4/sq ft at today’s rates:
| Typical 2,000 sq ft home (≈3,000 sq ft of wall) | ColorPlus | Primed + Painted |
|---|---|---|
| Finish premium on day one | +$3,000–6,000 | — |
| First repaint inside 20 years | Usually none, or one late (yr 15–20) | One (~yr 10–15): $9,000–12,000 |
| Finish problems in year 1–15 | Hardie’s warranty — paint & labor | Painter’s workmanship terms + paint brand’s material terms |
| Typical 20-year finish total | $3,000–6,000 | $9,000–12,000 |
Assumptions: wall area ≈ 1.5× floor area for a typical two-story Seattle home; repaint at our current $3–4/sq ft smooth-siding rate; ColorPlus homes that reach a first repaint do so at the late end of the window. Exact numbers for your home go on the written quote after a free assessment.
Put simply: ColorPlus costs $3–6K more on day one and typically avoids a $9–12K repaint inside 20 years. If you’ll own the house through that first repaint, the factory finish is usually the cheaper house.
Want the same 10- and 20-year math for cedar, LP, and metal too? The full maintenance-cost table is here.
15 Years in Writing vs. Your Painter’s Word
This is the difference most comparison articles gloss over. The ColorPlus finish carries James Hardie’s 15-year limited warranty covering peeling, cracking, and chipping — including the labor to make it right, not just replacement paint. That labor clause is rarer than it sounds: we’ve read Hardie’s board warranty, and it states in capital letters that Hardie will not pay any costs connected with labor — the ColorPlus finish warranty is the only Hardie warranty that does. It sits on top of the 30-year non-prorated warranty on the boards themselves (we break the full warranty stack down here).
A field-painted finish is only as warranted as your painter — and Hardie makes that official: the board warranty’s exclusion list names “peeling or performance of any third party paints, stains and/or coatings.” Once site paint goes on, finish problems are between you, the painter, and the paint brand; Hardie is out of the conversation. Good crews with good paint deliver a finish that goes 8–12 years in our climate before it wants attention — but nobody hands you a 15-year paint-and-labor document for it. When we field-paint, our own 5-year workmanship warranty applies to the work we did — and we tell you plainly that the repaint clock starts the day the sprayer stops.
The Painting Window Problem
Exterior paint wants dry boards, dry air, and steady temperatures — which in Puget Sound means roughly May through September. ColorPlus doesn’t care: the finish arrived cured from the factory, so we install it in January exactly as happily as in July.
Primed boards, by contrast, are on a clock: Hardie’s installation instructions require primed product to be painted within 180 days of installation — and staying inside the written instructions is a condition of the warranty. An October re-side that goes primed either paints in marginal weather or gambles most of that window on a Seattle spring. It’s the main reason many of our cool-season Hardie jobs land on ColorPlus even when the customer started out planning to paint.
Color Choice, Cut Edges & Touch-Ups
Color range: ColorPlus offers a curated palette of around two dozen standard colors (see the ColorPlus colors we install most in Seattle). Primed opens the entire Sherwin-Williams fan deck — if the color must match a specific trim, a historic scheme, or an HOA-approved formula, primed is the honest recommendation.
Cut edges and touch-ups: every ColorPlus job involves field cuts, and done right they disappear — color-matched edge coating on cuts, matched caulk at joints, and Hardie’s touch-up kit for nail heads and nicks, applied sparingly (dabbed, never brushed wide — touch-up paint weathers differently than the baked film). This is detail work; it’s where an experienced Hardie crew shows. On a field-painted house, touch-ups are simpler forever after: any painter with the formula can blend a patch.
Changing your mind later: ColorPlus can be repainted once it ages — at that point it simply becomes a field-paint house on a field-paint cycle. You’re not locked in; you’ve just pushed the first paint day 15+ years out.
How This Decision Goes on Real Seattle Homes
On recent quotes we’ve written both ways for good reasons. A Bellevue homeowner re-siding the whole house took ColorPlus on the lap siding — winter install, wanted the finish warranty, standard Iron Gray was exactly right. A 1920s Seattle bungalow went primed + Duration because the owners wanted a specific heritage color scheme no factory palette carries. A Magnolia full re-clad specced primed ColorPlus-style panels painted on site to hit an architect’s custom two-tone. Same board every time — the finish followed the owner’s priorities, not ours.
That’s how we’ll quote yours: both numbers side by side on one written estimate, with the 20-year math for your actual wall area — see finished examples here.
ColorPlus vs Primed — FAQ
Want Both Numbers for Your Home?
Every written quote shows ColorPlus and primed side by side, with the 20-year math for your actual wall area. Free on-site assessment, straight answers either way — and current rates are always on our pricing page. Call or text (425) 344-9635.
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