Tiled Showers · Floors · Waterproofing · Cowlitz County
Bathroom Tile Contractor Longview WA — Tiled Showers, Floors and What Goes Underneath
Nearly every enquiry starts with a photograph. Someone has found a floor they want, and wants to know what it costs.
The honest answer starts a layer down. Tile is a finish, not a structure — it does whatever the thing beneath it does. Whether a bathroom tile installation Longview WA homeowners still like in ten years depends on the subfloor, the membrane and the movement joints, none of which you will ever see. Get those right and almost any tile works. Get them wrong and the best tile in the showroom cracks along a joist line.
- 9 Tile & Floor Types
- Porcelain to heated floors
- Deflection Measured
- Before stone is ordered
- Bonded Membranes
- To a named ANSI standard
- Licensed & Insured
- Registered in Washington State
Floor Only, Wet Area, or the Whole Room?
People say “tile work” and mean one of three jobs with very different prices and risks.
Floor only, when the room otherwise works. New floor, everything else stays. A bathroom flooring installation Longview WA households ask for on its own is the cheapest worthwhile change to a bathroom — and in one of our six jurisdictions it may need no building permit at all. That is unusual enough to have its own section below, and it is the first thing worth asking any bathroom flooring contractor Longview WA homeowners are considering.
The wet area, when the shower is the problem. This is tile shower installation Longview WA work, and it is a different trade from laying a floor. What decides whether it lasts is the bonded membrane behind the tile. The tiling is the easy part, and the part everybody looks at — good shower tile installation Longview WA work is mostly invisible by the time you see the room.
The whole room, when it is already open. Floor, walls and wet area together — the only sequence where the floor build-up, the shower fall and the door threshold can all be set from one datum instead of negotiated one at a time. It is where a bathroom tile contractor Longview WA homeowners hire actually earns the fee.
Four things we check before quoting a floor
- 1Joist depth, spacing and clear span. The only one of the four you cannot fix with a product.
- 2What is directly below. A room, a crawl space or a slab — three jobs, and three consequences if water gets out.
- 3How many floors are already down. Rarely just one, and the stack sets your finished height.
- 4Whether anything plumbed comes out. The moment it does, the permit answer changes.
Nine Kinds of Tile and Flooring Work
Each is a stand-alone job. A bathroom tile and flooring Longview WA project can be one floor in one room, and a bathroom tile installation Longview WA quote for a single shower is as welcome as one for a whole house.
Tiled Showers
Substrate, bonded membrane, fall to the drain, then tile. A tile shower installation Longview WA job is judged on the parts that end up covered, which is why we photograph every one before the first tile goes on.
Bathroom Floor Tile
Porcelain or ceramic on a floor that has been measured rather than assumed. The bathroom floor tile Longview WA homes take best is usually porcelain — lower absorption, and more forgiving of a floor that moves a little.
Natural Stone
Marble, travertine, slate and limestone. Beautiful, and twice as demanding — stone wants a floor twice as stiff as ceramic does, plus sealing and re-sealing. If your floor is not ready we say so before you order.
Heated Bathroom Floors
An electric mat or cable under the tile on its own thermostat. Heated bathroom floor installation Longview WA is as much electrical as tiling: a heating cable in a bathroom floor needs GFCI protection, and in Kelso that circuit is not the City’s to permit.
Waterproofing and Shower Pans
The layer nobody sees and everybody pays for twice if it is wrong. Bathroom waterproofing Longview WA work means a membrane meeting a published standard, bonded to the substrate — not polythene stapled behind cement board.
Vinyl Plank and Sheet Vinyl
Not every bathroom should be tiled. Luxury vinyl plank is warmer underfoot, cheaper, and sensible in a rental or second bathroom. It is also the one floor that barely cares if the joists move, which occasionally makes it the technically correct answer.
Tub and Shower Surrounds
Tiled walls in place of a moulded panel. The code wants a nonabsorbent surface to at least six feet above the floor, so this runs higher than people expect. Which unit replaces which is a shower and tub question; how it is built is this one.
Niches, Benches and Curbs
Formed and waterproofed as part of the shower rather than cut in afterwards. Shower tile installation Longview WA detailing lives here — a niche is a hole in your waterproofing until it has been detailed properly.
Grout, Sealing and Movement Joints
The least glamorous and most diagnostic. Grout cracking in a straight line is a structural message, not a grout failure, and re-grouting hides the message for about a year.
Your Floor Is Allowed to Move More Than Stone Can Survive
Two published standards govern a tiled floor. They do not agree, and nothing in a building inspection reconciles them.
What the two standards say
- The building code allows a floor to deflect L/360 under live load, where L is the clear span.
- The tile industry standard allows the same L/360 for ceramic and porcelain.
- For natural stone it allows only L/720 — a floor twice as stiff.
- So a floor can pass inspection as fully compliant and still be twice as bouncy as the stone you just bought.
In plain arithmetic, on a thirteen-foot clear span: L/360 permits thirteen times twelve divided by 360, which is 0.43 of an inch of movement. L/720 permits 0.22. The floor has not changed. The requirement doubled, purely because of what you chose to put on it.
That bites harder here than in newer housing. A two-by-eight Douglas fir-larch joist at sixteen inches on centre — ordinary framing in this market, in the species the Long-Bell mills cut here — is good for twelve feet nine inches at L/360. Carrying stone it needs considerably less span. Which is why the honest answer to a marble floor in a 1920s city-core bathroom is often: stiffen the floor first, or choose porcelain. The bathroom floor tile Longview WA houses carry best is the tile that suits the floor you actually have, and a bathroom flooring contractor Longview WA homeowners can trust will have measured before answering.
Where stiffening is uneconomic, a crack-isolation membrane buys real margin — the standard ones bridge substrate cracks from a sixteenth to an eighth of an inch. But that is mitigation, not a stiff floor. A bathroom flooring installation Longview WA job that skips the measuring and reaches straight for the membrane is a gamble dressed as a specification.
Measure these four before you call anyone
- Joist depth — the actual dimension, from below if you can see it.
- Joist spacing, centre to centre. Sixteen inches is common; twenty-four is not rare.
- The clear span — bearing to bearing, not the width of the room.
- What is underneath: a room, a crawl space, or a slab.
Ten minutes with a tape and a torch answers most of what a quote needs, and it is the one part of this you can do yourself.
Waterproofing, and the Thing Under Your House
A tiled shower is a waterproofing system with tile stuck to the front. Neither tile nor grout is waterproof — grout passes water readily — so the membrane behind is the real barrier. That is why shower tile installation Longview WA is a waterproofing trade first, and why bathroom waterproofing Longview WA is the line worth reading twice on any quote.
The membrane is a standard, not a brand
ANSI A118.10 defines a load-bearing, bonded, waterproof membrane for thin-set tile — the benchmark a product must meet to be called waterproof in a tiled assembly at all. Its companion A118.12 covers crack isolation. Bathroom waterproofing Longview WA quotes that name no standard are naming none for a reason.
How far up the wall it has to go
The residential code requires bath and shower floors, and the walls above a bath with a shower head and inside a shower compartment, to be finished with a nonabsorbent surface extending to not less than six feet above the floor. Tiling to the top of the old panel and painting the gap above does not meet it.
Washington writes its own crawl-space rule
Under WAC 51-51-0408 the ground in a crawl space must be covered with six mil black polyethylene or approved equal, lapped at least six inches at the joints and carried to the foundation wall, unless there is a concrete slab at least two inches thick. Ventilation must give at least one square foot of opening per three hundred square feet of under-floor area. Washington does not adopt the model code’s under-floor vapour retarder section at all — here the ground cover is the rule.
Why that belongs on a tiling page
Because tile goes in last and reports first. Longview sits at roughly thirteen feet of elevation and takes about forty-eight inches of rain a year. Lay a sealed floor over a crawl space with torn ground cover or blocked vents and the moisture comes up through the assembly — and the new floor gets the blame. We look under the house before quoting a floor, and any tile installer Cowlitz County homeowners keep the number of will do the same.
Two hand-offs. If a pan has already failed and is leaking, that is bathroom repair work and is priced there. Whether a bath should become a shower, whether it will fit, and the pan water test it has to pass are answered on the shower and tub page — this page picks up once that is settled.
The One Job a City Here Names as Exempt
Every other service on this site is permit work almost everywhere in the county. Flooring is the exception — but only for the floor itself, and only on one side of a city limit.
City of Kelso — flooring is named
Kelso publishes a list of work needing no building permit, and it includes, verbatim, “Painting, flooring, cabinets, counter tops, and similar finish work”. Replace a bathroom floor and change nothing else, and that is the City’s published position. A bathroom tile installer Kelso, Longview WA and the county between will give three different answers to one question, and this is why.
City of Longview — no such exemption
Four miles away the published trigger is a building permit for “all alterations, additions, improvements, and repairs of existing buildings”, with no finish-work carve-out in it. Plumbing is a separate permit again — though a “One Stop” type eligible for online issuance, the quickest paperwork in the county.
The catch worth reading twice
Kelso’s exemption covers the flooring. It does not cover pulling a toilet to tile underneath it, because a replaced or relocated fixture is plumbing permit work. It does not cover a shower floor, which is plumbing and waterproofing before it is tile. Most real jobs touch one of those, so the exemption is narrower than it reads.
Unincorporated Cowlitz County
A gate nobody expects: since 1 May 2021 the County wants an Environmental Health letter confirming approved water and sewer before it issues a permit. That catches Longview Heights and the West Side Highway corridor, where the mailing address says Longview. Counter in Kelso, Monday to Thursday.
Castle Rock and Kalama
Castle Rock is a 2.09-square-mile city inside a 136-square-mile ZIP: Cloudpermit inside the limits, Accela and the Health letter outside. Kalama names a Tub and Shower Tile inspection in its published list and inspects Tuesdays and Thursdays only, so a tiled shower there is sequenced backwards from two weekdays.
A warm floor adds a trade
Heated bathroom floor installation Longview WA brings electrical work with it. Heating cables in a bathroom floor require GFCI protection for personnel, and the City of Kelso issues no electrical permits and performs no electrical inspections at all — that circuit goes to Washington State L&I, wherever the tiling stands.
Exemption wording differs by jurisdiction and the County declines to publish a closed list, so treat these as published triggers rather than a ruling on your address — we confirm yours in writing before anything starts, and any tile installer Cowlitz County homeowners hire should do the same. Full detail on each area page: Longview Heights, Kelso, West Side Highway, West Longview, Castle Rock and Kalama.
What We Find Under the Old Floor Depends on When Your Street Was Built
There is almost never only one floor down already, and the layers decide the build-up — which decides whether your new floor finishes level with the hallway or an inch above it. That is the commonest surprise in a bathroom flooring installation Longview WA quote, and looking first avoids it. It also decides which bathroom floor tile Longview WA houses can actually take, because a thick stone needs more build-up than a porcelain plank.
Pre-1950 stock — the 1920s city core, and the 36% of Castle Rock housing built before 1950 — gives diagonal board subfloor, no membrane anywhere, and often tile bedded in a mortar bed that has to be chipped out. Those beds were laid by people who understood floors; the downside is weight and a full day of demolition.
The 1960s and 1970s bring particleboard underlayment, which turns to porridge the first time it is wet and cannot be tiled over at any price. From the 1980s on — Kalama’s building peak, West Longview’s median build year of 1993 — it is plywood or OSB with sheet vinyl stapled down, the kindest start of the three, and where a bathroom tile installation Longview WA quote most often finishes near its first number.
And the water. The City’s supply has run roughly 69 to 91 mg/L hardness since the Mint Farm wells came online in 2013, against about 27 mg/L before. On a floor that means mineral film on polished stone and a sealer renewed sooner than the brochure suggests.
Housing age across the six areas
- Castle Rock
- 36% pre-1950
- Kelso
- median 1963
- Longview Heights
- mostly 1970–99
- West Side Highway
- mixed, rural
- Kalama
- 1980s peak
- West Longview
- median 1993
Each figure is sourced on that area’s own page. A bathroom tile installer Kelso, Longview WA or anywhere between should be able to tell you which era your bathroom belongs to before lifting a tile.
Three Questions That Rule Out Most Bad Tiling
Tile hides its own workmanship within a day. Everything that decides whether it lasts ten years or two is underneath it by the time you see the room.
Check the registration yourself
Washington State L&I publishes a free “Verify a Contractor” lookup showing registration, bond and insurance. Ask anyone quoting for the number and run it before you sign.
Ask what they measured
The sharpest question on this page. Ask what the joist depth, spacing and clear span are, and which deflection limit they worked to. A bathroom tile contractor Longview WA homeowners should hire answers in one sentence; someone who has not looked answers about tile instead.
Ask where the movement joints go
A tiled floor needs somewhere to move — at the perimeter, at changes of plane, and over structural joints. A floor tiled hard against the walls will tent or crack eventually, and no grout fixes that afterwards.
Every bathroom tile installation Longview WA job we take on is licensed, insured and registered in Washington State, we file the permits for our own work, and the scope goes in writing before anything starts. More on who we are, or see our bathroom repair and shower and tub work.
Tell Us the Floor, Not Just the Tile
Most bathroom tile and flooring Longview WA quotes price a square footage. The money is in the build-up — how many layers are down, how far the joists span, whether anything plumbed comes out, and whether the finished floor still works at the doorway. Heated bathroom floor installation Longview WA belongs in that build-up too, priced at the start rather than added later. A tile shower installation Longview WA price is quoted after a visit, never from a photograph, and if the honest answer is that your floor needs stiffening before any stone goes on it, that is what you will be told.
Worth mentioning on the form
- Roughly how many square feet of floor, even approximately.
- What is down now, and roughly how old the house is.
- What is directly below — a room, a crawl space or a slab.
- Whether you already have a tile or a stone in mind.
Tell us about your floor or tiling
Fields marked with an asterisk are the ones we cannot do without.
We use what you send here only to answer your enquiry. We do not sell, share or broker your details to any other contractor or lead service.
Tile and Flooring Questions We Are Asked Most
Do I need a permit to retile a bathroom floor?
It depends which side of a city limit you are on, and that is not a dodge. Kelso publishes an exempt list naming “Painting, flooring, cabinets, counter tops, and similar finish work”, so a floor replaced on its own is exempt there. The City of Longview publishes no finish-work exemption at all — its trigger covers all alterations, additions, improvements and repairs of existing buildings. In unincorporated Cowlitz County an Environmental Health letter confirming water and sewer comes first. And in all three, the moment a toilet is pulled or a shower floor is involved it becomes plumbing work and the exemption stops applying.
Can my floor take natural stone?
Often not without work, and it is far cheaper to know before you buy the stone. The building code allows a floor to deflect L/360 under live load, and the tile industry standard allows the same for ceramic and porcelain — but natural stone requires L/720, a floor twice as stiff. On a thirteen-foot span that is the difference between 0.43 of an inch of movement and 0.22. A two-by-eight Douglas fir-larch joist at sixteen inches on centre spans twelve feet nine inches at L/360 and needs considerably less to carry stone, so in older housing here the answer is often to stiffen the floor first or choose porcelain.
Is tile actually waterproof?
No, and it is the most useful thing on this page. Both tile and grout pass water, grout readily. The waterproofing is a separate bonded membrane behind and beneath the tile, and in a tiled assembly the benchmark for it is ANSI A118.10. Bathroom waterproofing Longview WA work also has a height: the code wants a nonabsorbent surface on shower walls, and above a bath with a shower head, to not less than six feet above the floor. If a quote does not say what the membrane is, the membrane is not specified.
Is a heated bathroom floor worth it, and what does it involve?
It is the one luxury most people here say they would buy again, because a tiled floor is cold for a good eight months of the year in this climate. Heated bathroom floor installation Longview WA is an electric mat or cable set under the tile on its own thermostat, and it lifts the floor build-up slightly — which is why it has to be decided before the floor is set rather than after. It is also electrical work: heating cables in a bathroom floor require GFCI protection for personnel, and Kelso issues no electrical permits and performs no electrical inspections, so that part goes to Washington State L&I.
Why has the grout cracked in a straight line?
Because the floor moved and the grout was the weakest thing in the assembly. A straight crack, especially one following a joist or crossing a doorway, is a structural message rather than a grout problem, and re-grouting hides it for about a year. There are two real fixes: make the floor stiffer, or build in somewhere for it to move, with joints at the perimeter, at changes of plane and over structural joints. A bathroom tile contractor Longview WA homeowners call back twice for the same crack has usually not looked underneath.
Can you tile the floor without touching the shower?
Yes, and it is a common and sensible job. A bathroom flooring installation Longview WA household wants on its own is quicker, cheaper and far less disruptive than a remodel, and in Kelso it may need no building permit. Two honest caveats: the new floor has to finish at a height that still works at the doorway and against the shower threshold, and if the shower itself is leaking then a new floor laid up to it will be the thing that finally shows it. A bathroom flooring contractor Longview WA homeowners trust says so before quoting rather than after.
Find Out What Your Floor Will Carry Before You Choose the Tile
One visit, one measured answer, one written itemised scope — no deposit and no obligation. Whether the right bathroom floor tile Longview WA answer is porcelain on the floor you already have, stone on a floor we stiffen first, or a tile shower installation Longview WA built properly from the substrate up, you get the reasoning with the number. That is how every bathroom tile and flooring Longview WA quote we write is put together.