James Hardie Fiber Cement Siding in Kent, WA
Why James Hardie Is the Top Siding Choice in the Pacific Northwest

Smith Exteriors LLC — James Hardie Alliance Member
Why this matters for your project
Correct Installation Protects Your 30‑Year Warranty
James Hardie's 30-year product warranty requires siding to be installed according to the manufacturer's published installation specifications. Improper installation can void warranty coverage regardless of product quality, including:
- Incorrect nail placement
- Insufficient clearance from grade or rooflines
- Inadequate sealing at windows and trim
Working with a James Hardie Alliance contractor means your installer has access to James Hardie's technical training resources and installs Hardie products the way the manufacturer intends.
Alliance members are listed on the James Hardie contractor locator, so you can verify our affiliation directly with the manufacturer before committing to your project.
Professional Installation You Can Trust

The critical installation details that determine long-term performance include:
Grade and Roofline Clearance
HardiePlank and HardieShingle need proper clearance from grade, decking, and rooflines. Siding set too close to horizontal surfaces traps moisture at the bottom edge, speeding up damage where it is hardest to inspect.
Nail Placement and Fastening
James Hardie specifies nail placement, penetration depth, and fastener type for each product line. Overdriven nails can crack the fiber cement, while underdriven nails allow movement that breaks the paint seal.
Sealing at Every Transition
Every window, door, corner, and trim transition is a potential moisture entry point. We seal each one to James Hardie specifications using compatible sealants that flex as fiber cement expands and contracts.
Moisture Barrier and Flashing
Fiber cement goes over a properly lapped moisture barrier. Flashing at windows, doors, and horizontal trim is installed before the siding, so any water behind the cladding is directed out, not into the wall.
These steps are not optional. They protect your 30-year product warranty and help your siding perform in Kent's climate for its full expected life.

Serving King County Homeowners
Reviews
Frequently Asked Questions About James Hardie Siding in Kent, WA
Why is James Hardie fiber cement siding so popular in the Pacific Northwest?
James Hardie fiber cement siding is engineered specifically for high-moisture climates. In Kent and the greater Seattle-Tacoma area, it outperforms wood siding because it does not absorb moisture the way wood does, which means no rot, no swelling, no repeated paint failure. It also resists insects and fire, and carries a 30-year non-prorated warranty — a lifespan that makes it one of the strongest long-term investments a Kent homeowner can make in their exterior.
What is the difference between HardiePlank and HardieShingle?
Hardie Plank is James Hardie’s horizontal lap siding product — the standard profile that replicates traditional wood clapboard siding. HardieShingle is designed to replicate the look of cedar shingles, with a staggered, textured profile. HardieShingle is commonly used as an accent on gable ends, dormers, and upper stories, while HardiePlank covers the main body of the home. The two products can be combined on the same home for architectural contrast.
What is ColorPlus Technology and do I need it?
ColorPlus Technology is James Hardie’s factory-applied finish system. Siding panels are pre-painted in a controlled factory environment with multiple coats baked on, rather than painted on site after installation. The finish is more consistent and more durable than field-applied paint, and it carries a separate 15-year finish warranty covering peeling, cracking, and chipping — including labor and materials. For Kent homeowners, the additional benefit is that factory-finished siding eliminates the weather delays and adhesion risks of painting fresh fiber cement in a damp climate. If you want the lowest-maintenance finish and the longest interval between repaints, ColorPlus is worth the additional cost.
How long does James Hardie siding last?
James Hardie fiber cement siding carries a 30-year non-prorated product warranty, meaning the warranty value does not decrease over time. When properly installed and maintained, fiber cement siding in the Pacific Northwest regularly reaches and exceeds that lifespan. The 30-year warranty applies to the product itself. ColorPlus Technology finish carries a separate 15-year warranty for the factory-applied paint.
Does proper installation affect my James Hardie warranty?
Yes, significantly. The 30-year James Hardie product warranty requires that siding be installed according to the manufacturer’s published installation specifications. Improper installation — including incorrect clearances, wrong fastener type, inadequate sealing at transitions — can void the warranty regardless of product quality. Working with a James Hardie Alliance member contractor gives you the assurance that your installation follows the specifications your warranty depends on.
How much does James Hardie siding installation cost in Kent, WA?
James Hardie fiber cement siding installation in the Kent and greater Seattle area typically ranges from $12,000 to $29,000 for a full re-side, depending on home size, the specific product and profile chosen, and any underlying damage found during the removal of existing siding. ColorPlus Technology finishes add a modest cost over primed products but eliminate or significantly reduce future painting costs. We provide free, itemized estimates so you have a clear number before committing.
How does James Hardie siding compare to vinyl siding?
James Hardie fiber cement siding and vinyl siding both outperform wood in moisture resistance, but they differ in several important ways. Fiber cement is more dimensionally stable — it does not become brittle in cold temperatures the way vinyl can. It holds paint better and longer. It is noncombustible, while vinyl melts in fire. And it more closely replicates the appearance of natural wood. Vinyl is a lower-cost option for homeowners prioritizing budget; James Hardie is the stronger long-term choice for performance and appearance.
Are you a licensed James Hardie installer in Washington State?
Yes. Smith Exteriors LLC is a licensed, bonded, and insured Washington State contractor and a member of the James Hardie Alliance. Our WA contractor registration number is SMITHEL789PE, verifiable through the Washington State Department of Labor and Industries contractor lookup tool.
