Tamko Bathroom Remodeling Nationwide

Tamko Bathroom Remodeling: The Pomona Owner’s Guide

Tamko bathroom remodeling in Pomona typically runs $9,000-$28,000 installed, with smaller baths starting around $5,000 and full gut renovations with premium Tamko materials reaching the upper end. We stock and install Tamko-compatible bathroom systems across the Pomona Valley, from the Fairplex corridor north to the foothill neighborhoods near Ganesha Park. Most owners first realize something’s wrong when they spot water staining the drywall below a second-floor bath, or when the laminate flooring they installed five years ago starts bubbling at the seams because the original moisture barrier failed behind the tub surround.

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Which Tamko Models This Applies To

Tamko doesn’t manufacture bathroom fixtures directly. They produce the structural and waterproofing layers that sit behind what you see: TAMKO waterproofing membranes, shower pan liners, and underlayment products that integrate with tile, fiberglass, or acrylic finishes. The critical match is between TAMKO’s HydroFlex waterproofing membrane and your substrate type. HydroFlex comes in 40-mil and 60-mil thicknesses; the 60-mil is spec’d for steam showers and any Pomona installation where the bathroom sits over a crawl space or unconditioned garage.

To identify what you’ve got, check the shower pan liner for an embossed TAMKO logo and mil rating. If you’re seeing failure at the curb or drain flange, the original installer may have used a generic PVC liner rather than TAMKO’s integrated system, which uses a pre-formed dam corner and bonding flange that seals to the membrane without field folding. That’s the compatibility gotcha in older Pomona homes, especially the 1950s-1970s stock near downtown where bathrooms were updated in the 1990s with whatever material was on the truck.

We source OEM TAMKO membranes and can match to quality aftermarket equivalents from Schluter or Laticrete where the project spec allows. The decision hinges on whether your original warranty is still in force and whether the tile or surround above it is being preserved or replaced.

Signs Your Tamko Bathroom Remodeling Is Failing

• Soft spots near the tub or shower base. The TAMKO membrane beneath the tile has torn at a seam or drain penetration, letting water saturate the subfloor. In Pomona’s dry climate, owners often miss this until the plywood has delaminated.
• Grout cracking in a straight line along the shower curb. This tracks the edge of the pan liner where it folds over the curb. TAMKO’s pre-formed corners eliminate this stress point, but field-folded corners crack as the house settles, which happens more than you’d think in the foothill zones near Phillips Ranch.
• Musty smell that returns after cleaning. Water is getting past the waterproofing layer and into the wall cavity. The TAMKO membrane may be intact but the liquid-applied flashings at the valve or showerhead escutcheon have degraded.
• Tile popping loose in the shower floor. The pan liner is holding water rather than draining to the weep holes, creating hydrostatic pressure. This usually means the liner was installed flat rather than presloped, or the weep holes in the drain body are clogged with grout.
• Visible mold on baseboards outside the bathroom. The waterproofing has failed at the tub flange or wall transition, and moisture is traveling along the subfloor. In Pomona’s older stucco homes, this wicks into exterior walls before anyone notices the bathroom itself looks fine.

Before

After

Replacement Cost & What’s Included

The range depends on three things: how much demolition reveals once we open the walls, whether the plumbing rough-in needs updating for current Pomona code, and the finish level of tile and fixtures you select. Under Clause 1 of the Haven Standard, you get a written flat price before any demolition starts, with line-item breakout so you can see where the money goes. No work proceeds on a change until the change order is signed. That’s how we’ve kept projects within a few percent of the agreed number across 4,000-plus jobs since 2007.

Every bathroom remodel includes a documented photo record of the opened walls, the membrane installation, and the final walkthrough. The 365-Day Done Right Promise covers the workmanship. TAMKO’s material warranty runs 10 years on HydroFlex when installed to their spec, which we follow.

DIY or Call Us?

There’s a safe middle ground here. You can pull the escutcheon plates and look for staining behind them. You can run water and check the crawl space or garage ceiling below for fresh drips. You can photograph the TAMKO logo and mil rating on any exposed membrane for us to review.

What you shouldn’t do is cut into a shower pan liner or remove tile trying to trace a leak. The membrane is the waterproofing; once you puncture it, you’ve converted a localized repair into a full pan replacement. In second-floor bathrooms, there’s also the structural question: water-damaged subfloor won’t support your weight the way you expect. We’ve seen DIYers step through plywood they thought was solid.

We carry TAMKO-compatible membranes, pre-formed corners, and drain assemblies on our trucks. Measure twice, then we can talk. Call (626) 606-1081 and we’ll review what you’ve found. If you have another contractor’s written estimate, we’ll go through it line by line at no charge under our Free Second Opinion.

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