Remodeling a Bathroom in an Older Camas Home: What the Mill-Era Housing Stock Needs

Why so much of downtown Camas needs this conversation

Camas grew up around the Georgia-Pacific paper mill on the Columbia River, and the walkable blocks closest to downtown still carry a real concentration of homes built in that early-20th-century mill era — modest footprints, narrow hallways, and, very often, a single full bathroom serving the whole house. That is a different renovation problem than the builder-grade primary baths climbing the newer subdivisions on Prune Hill and Grass Valley, where the layout is usually fine and the upgrade is cosmetic.

It is not a Camas-specific quirk that older homes need more than a cosmetic refresh — it is a national pattern. NAHB reports the median owner-occupied U.S. home is now 42 years old, up from 31 in 2005, and roughly 48% of owner-occupied homes were built before 1980. Downtown Camas's housing stock sits well inside that older cohort, which is exactly why bathroom remodels here so often turn into a conversation about what is behind the wall, not just what is on it.

The plumbing: galvanized pipe and mismatched materials

This Old House notes that homeowners with early-20th-century houses commonly still have cast iron or galvanized steel piping — the standard water-supply material before copper and, later, PEX took over. Galvanized pipe corrodes from the inside as its zinc coating wears away, typically over a 40-50 year service life that mill-era Camas homes have usually well exceeded. The result shows up as reduced water pressure, rust-tinted water, and, eventually, leaks inside a wall you cannot see.

A second problem compounds the first: galvanized pipe connected directly to newer copper fittings sets up galvanic corrosion between the dissimilar metals, accelerating failure right at the joint. A bathroom remodel is the practical moment to address this — once a wall is open for a new shower valve or vanity plumbing, re-piping that run in PEX or copper costs far less than an emergency repair after a wall has already failed.

• Reduced pressure, discolored water, or fluctuating temperature at multiple fixtures are common signs of galvanized pipe nearing the end of its service life.
• Dissimilar-metal joints (galvanized-to-copper) corrode faster than either material alone and are worth flagging for replacement even outside the immediate remodel scope.
• Re-piping while a wall is already open for a remodel is dramatically less disruptive than a standalone repipe project later.

The wiring: what knob-and-tube means for your bathroom plans

Knob-and-tube wiring — porcelain knobs and tubes routing individual conductors through framing, with no ground wire — was standard through the early 20th century and phased out by the 1940s. It still turns up in Camas homes from that era, and a bathroom remodel is one of the most common places it gets discovered, since bathrooms are frequently where a homeowner first wants added circuits: a heated floor, brighter vanity lighting, or GFCI-protected outlets that today's code requires.

Old wiring and modern bathroom loads do not mix safely. Before any new fixture goes in, a licensed electrician needs to evaluate what circuits actually feed that room and whether they can be safely extended or need to be replaced outright. This is not optional scope creep — it is the same reason a permit review exists in the first place.

Lead paint: a real rule for pre-1978 Camas homes

If your home was built before 1978, EPA's Renovation, Repair and Painting (RRP) Rule applies to any paid work that disturbs painted surfaces — trim removal, wall demolition around an old tub, anything that generates dust from old paint layers. The rule requires the firm doing the work to be EPA-certified and its crew trained or supervised in lead-safe practices, specifically to keep lead dust out of the air your family breathes.

This is worth confirming with any contractor bidding a mill-era Camas bathroom before work starts, not after demo has already begun. It is a straightforward box to check, but it is a legal requirement, not a suggestion — and it exists because lead dust from a renovation is a genuine health hazard, not a hypothetical one.

Waterproofing: the standard has changed more than the tub has

A mill-era Camas bathroom's clawfoot tub or original tile can be original to the house and still be structurally sound — waterproofing is usually the part that has not aged well, because the standard itself has moved so far. Building Science Corporation's interior water management guidance frames the modern approach around anticipating water getting where it should not: full wet-room-style waterproofing rather than a tiled surface with a caulk line as the only real barrier, insulated and accessible supply lines, and flooring in the wet zone that tolerates water rather than just resisting a splash.

That is a meaningfully higher bar than what most bathrooms from this era were built to, and it is worth treating as its own line item rather than assuming new tile automatically means a waterproof assembly underneath it. Our shower waterproofing guide walks through what a membrane system actually needs to do, and it is the standard we hold every full bathroom remodel in Camas to, regardless of the home's age.

What to keep: the clawfoot tub and the character that makes it your house

Not everything old needs to go. A cast-iron clawfoot tub from a Camas mill-era home can often be refinished rather than replaced — the porcelain enamel surface can be professionally reglazed, and the tub itself, built with thick cast iron, generally outlasts most fixtures made today. The plumbing feeding it is a separate question from the tub itself, and often the better answer.

Where a single clawfoot tub no longer fits how a household actually bathes, a tub-to-shower conversion in Camas is the more common outcome — but it does not have to erase the room's character. Trim proportions, fixture finish, and tile scale can all be chosen to sit comfortably in a house built a century ago rather than looking like a showroom insert dropped into an old shell.

Sequencing the remodel so surprises do not blow up the budget

The single biggest risk in an older-home bathroom remodel is not any one of these issues — it is discovering more than one of them after the wall is already open. A remodel that assumes the plumbing, wiring, and waterproofing are all original and untouched, and prices a contingency for that, holds together far better than one that assumes a straightforward cosmetic swap.

That means an early walkthrough matters more here than in a newer Prune Hill or Grass Valley home: identifying pipe material, flagging any visible knob-and-tube, and confirming the home's build year against the 1978 lead cutoff, before a final scope and price are set.

Permits and licensing: not optional for this scope of work

Plumbing re-pipes, electrical work, and structural changes in a Camas bathroom remodel all require a permit from the City of Camas Building Division (616 NE 4th Avenue), which reviews the work against the state-adopted building and plumbing codes. Our Camas bathroom remodel permit guide walks through what triggers a permit and what the timeline typically looks like.

Confirm your contractor separately: Washington L&I requires all contractors to be registered, bonded, and insured under RCW 18.27, and a city cannot legally issue a building permit to an unregistered contractor. Verifying registration before signing anything is a five-minute check that protects you on a project with this much behind-the-wall work.

How Camas Bath approaches an older home

We treat a mill-era Camas bathroom differently from a newer subdivision remodel from the first walkthrough — checking pipe material, flagging wiring for electrician review, confirming the lead-paint cutoff, and pricing waterproofing to today's standard rather than assuming the existing assembly is sound. The goal is a bathroom that works like a modern one and still looks like it belongs in the house it's in.