Seattle Exterior Cedar Has Real Appeal — And Real Demands
Cedar siding shows up on a lot of homes around Seattle for good reason. It has a warmth and natural grain that manufactured products spend a lot of effort trying to imitate. Western red cedar is also naturally resistant to rot and insects compared to other softwoods, and it's a regional material with a long track record in the Pacific Northwest. We're not here to tell you cedar is a bad product. We're here to tell you honestly what it takes to keep it looking and performing the way it did on day one — because that's the part homeowners often don't hear until they've already signed the contract.
What Seattle's Climate Does To Wood Siding
King County doesn't get brutal winters, but it gets something arguably harder on wood siding: long stretches of damp, mild weather with limited drying time between rain events. Add in salt air near the water, driving rain that hits west and south-facing walls directly, and a moss and algae season that can run most of the year in shaded or north-facing areas, and you have conditions that constantly test any wood product's finish and joints.
Cedar itself resists decay reasonably well when it's solid, clear lumber. The problem is almost never the wood species — it's everything around it: the finish, the fasteners, the joints, and the maintenance schedule required to keep moisture from getting a foothold.
The Maintenance Cedar Actually Requires
This is the part of cedar ownership that tends to get glossed over in the sales conversation:
- Refinishing on a real schedule. Stain or clear sealer on cedar typically needs reapplication every 3-5 years in a marine climate like ours — sooner on sun-and-rain-exposed elevations. Paint lasts longer but hides the grain, and repainting cedar has its own prep demands.
- Moss and mildew control. Shaded walls and north-facing exposures in the Seattle area grow moss and algae readily. Left alone, organic growth holds moisture against the wood and accelerates finish breakdown.
- Caulking and joint upkeep. Board joints, butt seams, and trim intersections need periodic inspection and re-caulking. A cracked joint that goes unnoticed for a season is exactly how water gets behind the siding.
- Board replacement. Even well-maintained cedar eventually has individual boards that split, cup, or rot at end grain — usually at the bottom courses, around windows, or wherever water has repeated contact time.
- Woodpecker and insect vigilance. Cedar is more insect-resistant than most softwoods, but it's not immune, and older or compromised sections can attract woodpeckers looking for insects underneath.
None of this makes cedar a bad choice for every homeowner. Some genuinely enjoy the upkeep and want the natural look badly enough to accept it. But it's a real, recurring cost — in time, money, or both — and it's fair for a homeowner to know that going in rather than finding out at year four when the finish is already failing on the south wall.
Where Cedar Problems Actually Start
In our experience, cedar siding failures on Seattle-area homes rarely come from the wood being defective. They come from:
- Finish maintenance falling behind schedule, often because the interval isn't obvious until damage has already started
- Poor original installation — insufficient back-priming, wrong fastener spacing, or joints not properly flashed
- Grade contact or insufficient clearance, letting splash-back and standing moisture sit against the bottom courses
- Shaded, low-airflow wall sections where moss and moisture just don't dry out between storms
A lot of these are fixable with disciplined maintenance. The catch is that "disciplined maintenance" has to actually happen, year after year, for the life of the siding — and that's a bigger ask than most people realize when they're comparing sample boards in a showroom.
Why We Standardized On James Hardie Instead
We made a decision as a company to install James Hardie fiber cement siding and nothing else. Part of that decision is about what fiber cement does with moisture: it doesn't absorb water the way wood does, it's dimensionally stable across our wet-dry cycles, and it's non-combustible. Part of it is the finish — Hardie's ColorPlus factory-baked finish is engineered to hold color and resist fading, chipping, and cracking far longer than a field-applied stain or paint job, without the 3-5 year recoat cycle cedar demands.
Hardie also builds product lines specifically engineered for regions like ours — the HZ5 formulation is designed around the freeze-thaw and moisture conditions common to the Pacific Northwest. And it carries a strong transferable warranty backed by a large, established manufacturer, which matters when you're talking about a 30-plus-year exterior investment on a home in a climate that doesn't give wood siding much of a break.
Cedar can be the right call for the right homeowner who wants that specific look and is committed to the upkeep. Our job is to make sure you're choosing it with your eyes open, not finding out about the maintenance schedule after the fact — which is exactly why we don't install it ourselves.
Let's Talk About Your Home
If you're weighing cedar against fiber cement for a home anywhere in the Seattle area, we're happy to walk your specific exposures — sun, shade, rain-facing walls — and give you a straight answer about what each option really means for upkeep. Reach out for a free, no-pressure estimate and we'll talk through what makes sense for your house.