Tile Work in Canyon Country

Worth checking, not assuming. The City's draft environmental report for the Vista Canyon project, on the Santa Clara River corridor, notes that mudstone beds in the Mint Canyon Formation under that site may expand with repeated cycles of wetting, and that the state map for the Mint Canyon quadrangle classes the alluvial areas along the river as potentially susceptible to liquefaction. Those findings describe one site, and your lot could be different. What the slab itself shows is better evidence: the cracks it already has, whether they have moved, and whether the floor is flat. Where the slab gives any reason to expect movement, tile goes down over a membrane with soft joints laid out to match. Source: City of Santa Clarita, Vista Canyon Draft EIR, section 4.1 geotechnical hazards, October 2010, pages 4.1-8 and 4.1-10

If the crack is stable. A hairline crack with no height difference gets a crack isolation membrane over it, carried well past each side. A crack that has opened wider over time, or where one side sits higher, has been moving, and tile over it will break along the same line. That one gets looked at before any tile is chosen, sometimes by an engineer.

Because it lets the concrete shift a little without dragging the tile with it. Small movement stays below the membrane, and the grout above stays whole.

Sometimes. It deserves a look before anyone swings a hammer. Nearly a quarter of the homes in that ZIP were built in the 1960s, and many of their bathrooms were tiled over a packed mortar bed on wire lath. That work is heavy and often still solid. If the tile sounds firm when tapped and the shower has not been leaking into the framing, regrouting and new fixtures can carry it a good while longer. If the wall sounds hollow, the grout keeps failing along the tub, or there is staining on the far side of the wall, the bed comes out and the job becomes a rebuild from the studs. Source: US Census Bureau, ACS 2020 to 2024 5 year estimates, table B25034, ZCTA 91351, 1960 to 1969 share

The old bed was thick and the new assembly is thin. Backer and membrane sit much lower, so the floor is built back up to meet the hall and the toilet flange is reset to the new height.

The original pan in a house from that decade was often a hot mopped tar liner or a sheet metal pan buried under the mortar, and by now either may have given out at the drain or the corners. The rebuild goes back to framing and subfloor, sets a new sloped base, and adds a continuous membrane tied into the drain. Then the drain is plugged and the pan is filled to prove it holds, before any tile is set. It is the heart of a full bathroom rebuild in an older Canyon Country house.

Cement board in the better cases, and sometimes water resistant drywall around a fiberglass pan. Neither is waterproof on its own. That is why a shower from that era can look fine and still have wet framing behind it, and why the rebuild adds a continuous waterproof layer.

Loose tile on a newer slab usually traces to one of three causes: thinset that never fully covered the back of the tile, no soft joint at the walls so the field had nowhere to expand, or the slab moving under it. Tapping finds the hollow ones. The repair depends on the cause, and where the ground may swell with wetting, the membrane question comes back.

In many homes, with more preparation than a slab needs. The floor is framed over a steel chassis and decked with panels meant for carpet and vinyl, so it flexes under foot traffic more than tile likes. Framing and decking get checked for soft spots first, especially around the tub, the toilet and the water heater. A stiffer underlayment screwed down over the decking, an uncoupling membrane, and porcelain in a moderate size make the floor behave. Heavy stone and a thick mortar bed are the wrong choice here, for the flex and for the weight. Where the floor cannot be made stiff enough, a different floor is the honest answer.

Manufactured homes rest on piers under the chassis, and one that settles puts a twist into the floor. Tile shows it first, as a crack running across the room. So the home's level is checked before tiling, and if it is out, releveling comes before any tile.

Not without planning. The marriage line where the halves join can shift a little, so a soft joint or a transition goes right over it.

Depends on the work. Rebuilding a shower, moving a drain or replacing floor decking alters the home, and HCD says a manufactured home alteration needs a permit before work starts. Whether plain surface tile counts is a question for the agency, and inside a park that agency may be the state, so it gets asked for your park first.

Porcelain, most of the time, because it is harder and absorbs less water. Keep the size moderate and skip thick stone.

Small mosaic on the floor, in a matte or textured finish. Every grout line is grip for a wet foot. Larger, smooth tile on the walls keeps cleaning simple. A contrasting edge at the curb and along the bench shows where the step and the seat are, which matters more as eyes change. Porcelain stands up to cleaners and does not need the sealing natural stone does.

Usually, as a corner seat or a bench anchored into the wall framing. Manufactured home walls are thinner, so the bench gets its own solid support, is wrapped in the same membrane as the shower, and slopes slightly so water runs off.

Not properly. Tile needs a solid, waterproofed backer, and a fiberglass surround is neither. The surround comes out, the walls get backer and membrane, and then tile. Wall panels are the alternative where weight or cost rules tile out.

One of the toughest, if it is picked for the job. A textured porcelain with a darker grout hides what comes in from the barn, and a recessed mat well at the door catches the worst of it. Horse keeping is part of the rural and equestrian character the Sand Canyon district is written to preserve, so a hard working entry is a sensible request on those lots.

Settle it first. Old floor tile, the black mastic under it and some sheet goods from that era can contain asbestos. In the South Coast air district a survey is required before renovation or demolition regardless of the building's age. That survey requirement does not apply to a single unit home where less than 100 square feet of asbestos containing material is removed or stripped, and a condo or townhouse does not count as one. A full tear out of a 1960s bathroom floor and walls can pass that line. So the survey question is answered before demolition day, and anything found is handled by a licensed abatement contractor before the tile crew starts. Source: South Coast AQMD Rule 1403, survey requirement and single unit dwelling waiver (j)(10), as amended 5 October 2007

On a sound mortar bed floor, it can be, since stone likes a stiff, heavy base. It is also softer and more porous than porcelain, needs sealing, and etches under some cleaners. On a thin rebuilt floor, a porcelain that looks like stone is often the safer pick.

Short of opening a small section, you go by what shows around it: soft drywall on the other side of the wall, staining at the baseboard, a musty vanity next door, grout that keeps cracking at the tub. In a house that was County land before an annexation, a permit for that work may sit with either agency, or with neither. Where the evidence points to water, the wall gets opened before new tile is planned.

The parts you will never see, listed apart from the tile you will. Demolition, including a mortar bed if the house has one. Whatever the slab or the decking needs: crack mapping, a membrane, a stiffer underlayment, or leveling. Waterproofing and a flood test for any shower. An asbestos survey where the job calls for one. Then setting, grout and sealing. Every piece is priced in writing before work starts, and one person runs it from the first walk to the final walkthrough.