Bathtub Replacement in Lakewood, CA
Bathtub replacement in Lakewood: how acrylic and cast iron differ in practice, getting the old tub out of the house, and repairing the walls around it.
Bathtub Replacement in Lakewood
Replacing a tub sounds like swapping one object for another. In an alcove it is closer to a small demolition: the surround has to come off, the old unit has to leave the building through doorways it may not fit, the drain connection has to be remade from below or through an access panel, and the walls have to be rebuilt around whatever goes back in.
The Material Decision
Acrylic is light, warm to the touch and easy to handle. Cast iron holds heat, feels solid and weighs enough to matter structurally and logistically. Steel sits between the two and is the least forgiving of a poorly supported base. Each of these changes the installation, not only the finished feel.
Getting the Old One Out
This is the part that surprises people. A cast iron tub is broken up in place rather than carried out whole, which is loud, sharp and requires protecting everything on the route. An acrylic unit is cut and folded. Neither is a two person lift down a hallway.
What Happens to the Walls
Removing a tub takes the bottom course of the surround with it, and the substrate behind is often the original board rather than anything water resistant. Rebuilding that properly is where the real quality of the job sits, and it is invisible the day it is finished.
Guides
The pages below compare acrylic and cast iron in practice, cover the removal itself, and look at rebuilding the surround so the new tub lasts.
Latest Guides
Acrylic and Cast Iron Tubs Compared in Practice
2026-09-05
Heat
Cast iron with its porcelain enamel takes heat out of the water at first and then holds it, so a bath stays warm noticeably longer. Acrylic does the opposite: it warms instantly and loses heat faster, though a unit with a foam backed shell narrows the gap considerably. For a household that actually soaks, this is the deciding property.
Weight and What Carries It
An empty cast iron tub is a serious weight before any water or occupant is added. On a ground floor over a slab that is irrelevant. On a suspended floor it is worth a look at the joists and the span, particularly in an older house where a previous alteration may have notched something.
Support Under an Acrylic Base
An acrylic tub is only as solid as what is under it. Set on a proper mortar bed or its supplied cradle it feels firm underfoot for decades. Set on nothing in particular it flexes, the flex works the seal at the wall joint, and water eventually gets behind the surround. Most complaints about acrylic are really complaints about installation.
Damage and Repair
Acrylic scratches and can be polished out. It also cracks if something heavy is dropped, and a crack in the base is difficult to fix invisibly. Enamel chips when struck and the exposed iron then rusts, which needs attending to promptly but is a small repair.
Choosing on the Room
An upstairs bathroom in a mid century house with a narrow stair is an argument for acrylic on logistics alone. A ground floor bathroom where the tub is used properly and often is an argument for iron. Both are correct answers to different questions.
Getting the Old Tub Out of the House
2026-08-24
Measure the Route First
Before anything is disconnected, walk the path from the bathroom to the street with a tape. Doorway widths, a turn at the top of a stair, a low soffit in a hallway. A tub that came into an unfinished house during construction does not automatically come out of a finished one, and discovering that with the plumbing already cut is a bad afternoon.
Protect Everything on That Path
Hardboard or heavy protection on floors, corner guards on door casings, and dust containment at the bathroom door. Demolition dust from a mortar bed travels through a house remarkably well, and a day spent protecting is cheaper than a week of cleaning and touching up.
The Drain Is the Real Work
A tub connects to the waste and overflow assembly, which is reached either from beneath through a floor or ceiling below, or through an access panel in an adjoining wall. Where neither exists, one has to be made. This single detail is what separates a one day job from a two day one, so it is worth establishing before the quote is accepted.
Breaking Up Cast Iron
Iron is scored and broken with a sledge inside heavy sheeting, with eye and ear protection, and the pieces are carried out in manageable loads. It is not delicate work and it is not something to do around a finished floor without full protection in place. Enamel fragments are genuinely sharp.
Look Before Anything Goes Back
With the tub gone, the cavity beneath and the framing around it are visible for the only time in decades. Check for rot at the sole plate, for previous leaks, for the condition of the subfloor and for anything the vent is doing that it should not be. Any correction is trivial now and a full strip out later.
Rebuilding the Surround Around a New Tub
2026-08-17
The Substrate Is Not Ordinary Board
Standard wallboard in a tub surround absorbs water, swells and gives up. The replacement is cement board, a foam backer panel or a board with an integral waterproof membrane, each installed to its own instructions. This is the single most common corner cut in a tub replacement and it is invisible until the day it is not.
The Flange Detail
An alcove tub has an upstand along the wall edges. The backer board sits above that flange, not on top of it and not behind it, so any water running down the wall lands inside the tub rather than behind it. Getting this relationship wrong routes water into the wall cavity permanently, and no amount of sealant afterwards corrects it.
Waterproofing Over the Top
A liquid membrane or a sheet system applied over the backer, taken into the corners with the correct banding, is what actually keeps the wall dry. Corners and the joint at the tub edge are where failures start, so those are the places to watch during installation rather than the open field areas.
The Joint at the Tub Edge
That line is silicone, never grout. It has to move, because a tub with a person and water in it sits lower than an empty one. Filling it with a rigid material guarantees a crack, and a cracked joint at exactly that height feeds water straight into the wall.
Fill It Before Sealing
The correct sequence is to fill the tub with water, then apply the silicone joint, then let it cure and drain. Sealing an empty tub sets the joint in its raised position, and the first bath stretches it. It costs nothing to do in the right order and it is the difference between a seal that lasts years and one that fails within months.