Ferndale Exterior Building a Deck for Custer Homes
Custer sits in the flat, open farmland north of Ferndale, a few miles inland from the Birch Bay shoreline and not far from the Canadian border. It's a quieter, more rural stretch of Whatcom County than the towns closer to the water, with larger lots, working farmland, and fewer trees or buildings to break up the wind. That open exposure matters more than a lot of homeowners expect when it comes time to build a deck, because a deck has no roof or wall to shield it — it sits outside year-round, taking on whatever the site's actual weather does to it.
Even set back from the coast, Custer isn't sheltered from the marine air that defines this part of Washington. Wind off Birch Bay and the Strait carries salt-laden moisture inland across the open fields, driving rain moves through with real force on a flat, unobstructed lot, and the mild, damp climate keeps a moss season going for most of the year. A deck built for Custer needs to account for all of that, not just look good on installation day. This page covers what that actually means for material choice, construction detail, and the process we use to build a deck that holds up on a Custer property specifically.
What Custer's Setting Does to a Deck
Salt Air That Still Reaches Inland
Custer sits far enough from Birch Bay and the Strait of Georgia that it doesn't feel like a coastal town, but the marine air here doesn't stop at the shoreline. Wind carries salt-laden moisture across the open farmland well inland, and a deck — with no wall or roofline around it — is exposed to that air on every surface, all the time. Salt accelerates corrosion in exposed fasteners, brackets, and railing hardware, and corroded hardware loses holding strength well before it looks obviously bad. On a structure people walk and stand on, that's worth taking seriously even a few miles from the water.
Driving Rain With Nothing to Block It
Flat, open farmland has a downside when a storm rolls through: there's little to slow wind-driven rain down before it reaches a house. On a lot surrounded by trees or other structures, wind loses some force before it hits the deck. On the kind of open rural property common around Custer, rain drives sideways with more consistency, pushing water up under railings, into ledger connections, and between boards that aren't gapped to handle it. A deck design that would perform fine on a sheltered in-town lot can still trap water here simply because there's nothing around it to break the wind.
A Moss Season That Runs Most of the Year
Mild temperatures and persistent regional moisture give moss and mildew a long growing season across Whatcom County, and horizontal surfaces like deck boards are usually the first place it takes hold — they hold standing water longer than a vertical wall and stay damp between storms. On a rural property with open sky exposure but also plenty of shaded or low-lying spots, moss pressure can vary a lot across a single deck, and a material with any real surface porosity gives it something to grip.
Choosing the Right Decking Material for a Custer Property
Material choice carries more weight on an exposed rural lot than it does on a sheltered, tree-lined property, because the performance gap between a well-suited product and a poorly-suited one shows up faster out here. The three main categories homeowners weigh are pressure-treated or cedar wood, capped composite, and cellular PVC.
Wood
Pressure-treated lumber and cedar are the traditional choice, and both can look good when new. But both need regular sealing or staining to hold up against sustained moisture, and both are more vulnerable to fastener corrosion in salt-laden air over time. On an open Custer lot with little wind protection, unmaintained wood is usually the first material to show graying, moss, and soft spots.
Capped Composite
Capped composite boards use a plastic shell around a wood-fiber composite core, which resists moisture absorption, staining, and UV fade far better than uncapped composite or wood. For a property taking regular wind-driven rain and salt-laden air, that cap layer is doing real work — the difference between a board that needs occasional washing and one that needs ongoing sealing to hold up.
Cellular PVC
PVC decking contains no wood fiber at all, so it doesn't absorb moisture the way even capped composite can at cut edges or fastener holes. It typically costs more than composite and can flex more under heavy point loads, but for a deck facing sustained moisture and wind exposure with little natural shelter, some homeowners decide the added moisture resistance is worth the extra cost.
| Material | Handling Salt Air & Wind-Driven Rain | Moss Resistance | Upkeep |
|---|---|---|---|
| Cellular PVC | Excellent — no wood fiber to absorb moisture | Strong, smooth non-porous surface | Occasional washing |
| Capped composite | Strong — cap layer resists moisture and staining | Good on most lines | Occasional washing |
| Uncapped composite | Moderate — some moisture absorption at exposed fiber | Fair; more prone to buildup over time | Periodic cleaning |
| Cedar | Moderate — natural resistance, but needs sealing | Fair when sealed and maintained | Regular oiling or sealing |
| Pressure-treated wood | Weak against sustained exposure over time | Poor without regular treatment | Regular sealing or staining |
What a Correctly Built Deck Involves on an Open Lot
The decking surface gets most of the attention when homeowners picture a new deck, but on an exposed rural property, the framing, fasteners, and drainage underneath are what actually determine how long it lasts. A build done right for a Custer lot includes:
- Framing material rated for sustained moisture exposure, sized correctly for the span and the load the deck will actually see
- Stainless steel or coastal-grade corrosion-resistant fasteners throughout, not standard hardware that starts corroding within a few seasons in salt-laden air
- Hidden fastener systems on the walking surface where the decking product supports them, reducing exposed metal and giving a cleaner finish
- Correct board gapping for drainage and material movement, so wind-driven rain can actually clear the surface instead of pooling between boards
- Proper ledger board flashing where the deck ties into the house — one of the most common places moisture gets into the structure on a poorly built deck
- Railing and post attachment sized for real, unobstructed wind exposure rather than a standard in-town spec
- Footing depth and placement that accounts for the property's actual soil and drainage, which varies more on rural and agricultural lots than in a typical subdivision
- Ventilation and grading underneath the deck so moisture doesn't sit against the framing between storms
Skip any of those and the deck will likely still look fine the day it's finished. The problems tend to show up a few winters later — a soft joist, a loosening railing post, or corrosion staining bleeding down the boards below a fastener.
Design Considerations for Rural Lots
Building on a larger rural property raises a few questions that don't come up as often on a smaller in-town lot. Well and septic system locations often constrain where footings can go and how heavy equipment can access the build site, so we confirm those locations early rather than discovering a conflict mid-project. Open exposure on a farmland lot means wind direction and prevailing weather matter more to railing style and orientation than they would on a sheltered property with neighboring structures nearby. And because rural lots tend to be larger, homeowners often have more flexibility in deck size and placement — worth thinking through early, since a bigger deck changes framing, footing count, and material budget in ways that are easier to plan for upfront than to add on later.
How Our Process Works
We start with a site visit to see what's actually there: existing structure condition on a replacement project, soil and drainage across the lot, wind exposure and how open the site really is, and where any well, septic, or utility lines run that affect footing placement. From there we go over decking material options that fit the budget and how the space will get used, whether that's a simple deck off the back door or a larger space built for entertaining on a bigger rural lot.
Permitting in Custer falls under Whatcom County's building requirements, and we handle that as part of the job rather than leaving it for the homeowner to sort out. Once permitted, construction follows the sequence above: footings and framing first, sized and fastened for the site's actual wind and moisture exposure, then the decking surface, railing, and any stairs. We finish with a walkthrough covering what the specific material you chose actually needs going forward — for most modern decking that's minimal, but it isn't nothing.
Cost Factors for Custer Deck Projects
| Factor | What It Affects | Why It Matters Here |
|---|---|---|
| Site access | Labor time and equipment staging | Rural properties can have longer driveways or less direct access than an in-town lot |
| Footing and soil conditions | Foundation design and depth | Agricultural and rural soil varies more than compacted subdivision lots, and drainage needs vary with it |
| Deck size and layout | Material quantity and framing complexity | Larger rural lots often support bigger decks, which changes the framing and footing count needed |
| Fastener and hardware grade | Material cost and long-term durability | Wind-driven, salt-laden air calls for corrosion-resistant hardware even a few miles inland |
| Decking material | Upfront cost and maintenance over time | Wood costs less upfront but needs more upkeep than composite or PVC in this climate |
Exact costs depend on the specific lot and how it's actually built, which is why we walk the property in person before giving a real number instead of quoting off a generic price list.
Keeping a Custer Deck in Good Shape
Even a well-built deck in the right material needs some routine attention in this climate to reach its full lifespan. Worth keeping on a regular schedule:
- Rinse the deck surface periodically to clear salt residue, pollen, and organic buildup before it works into the surface or cap layer
- Keep gaps between boards clear of leaves and debris so water and airflow can move the way the design intends
- Check railing posts and hardware once a year for early corrosion or loosening, especially heading into the wet season
- Keep an eye on grading and drainage around the footings, particularly after heavy rain, since rural lots can shift how water moves across a property over time
- Address any soft framing or standing water underneath right away — it's a structural issue, not a cosmetic one, and it won't improve on its own
Why It Matters That We Already Work Custer
A crew that mostly builds decks in town can still put one together competently, but a Custer job brings up variables that don't come up as often on a sheltered in-town lot — wind exposure with nothing around to break it, corrosion-grade fastener requirements from salt-laden air that reaches well inland, and site logistics tied to wells, septic systems, and rural access that a subdivision lot doesn't have to consider. Working this area regularly means we're not guessing at those requirements on your project. We've seen which decking materials and fastener grades actually hold up against the combination of open wind exposure, driving rain, and a long moss season that defines this part of Whatcom County, and which details are worth the extra time rather than an upsell.
That familiarity shows up in smaller judgment calls too — how to orient a deck for the wind a specific open lot actually sees, or being straightforward with a homeowner about what a deck out here really needs to last versus what's just an added line item.
Get a Straight Answer About Your Deck
Whether you're replacing a tired deck, building new, or just want an honest read on what a deck would take on your Custer property, we're happy to walk the site with you and lay out the options plainly. Reach out using the form below for a free, no-pressure estimate.