5 Bathroom Renovation Mistakes I Made (And How to Avoid Them) – Moen Faucets, Window Film & Ceramic Coating

Your Quick-Fix Questions, Answered from My Failures

I've been handling renovation orders for 7 years. In that time I’ve personally made (and photographed) 12 major mistakes, totaling roughly $4,800 in wasted budget. Now I maintain our team's checklist. Here are the questions I wish I’d asked before each screw‑up.

1. Is the Moen Voss One‑Handle Bathroom Faucet (6903) really easy to install? I heard it needs special tools.

Short answer: Yes, it’s DIY‑friendly. But I made it harder than it should have been.

In January 2024 I ordered the Moen Voss 6903 for a client bathroom. Unboxed it, looked fine. Then I tried to mount it without reading the template – the deckplate hole alignment was off by 3 mm. Why? I assumed all single‑hole faucets have the same spread. They don’t. The 6903 uses a 1‑hole design with a 4‑inch escutcheon, but the valve body needs a 1⅛" hole. I drilled a 1" hole. Had to reorder the faucet.

That mistake: $220 on the replacement, plus $90 for an emergency plumber visit. Total $310. The original faucet? $165. I only believed the “measure twice” advice after ignoring it. Now I always dry‑fit before drilling. Period.

2. Moen 3‑handle tub and shower faucet – how do I know which cartridge to replace?

This one hurt. In September 2022 a customer asked me to fix their leaking Moen three‑handle tub/shower valve. I bought a generic cartridge kit – $38. Installed it. Leaked worse. Turned out the original was a Moen 1222 cartridge (for Posi‑Temp), but the valve body was actually an older 1225 model. Different spline count.

The lesson: never guess the cartridge by the handle style. Pull the old cartridge first, check the number on the side. That “cheap” generic cost me $38 + $75 in call‑back labor + a half‑day delay. The correct OEM cartridge was $22.

Total cost of guessing: $135 vs $22. That’s TCO thinking – the time and risk of being wrong are real costs.

3. Stained glass window film – does it really work as a privacy solution? What’s the catch?

Another personal fail. In March 2023 I covered a bathroom window with a “stained glass” adhesive film from a big‑box store. $29. Looked great for a week. Then bubbles formed, edges peeled. Worse – direct sun made the adhesive yellow within three months. Ended up removing it with a heat gun, then repainting the window frame because the glue residue stained the wood.

Total cost: $29 film + $12 solvent + $18 paint + 4 hours labor = roughly $80. And the result? Not great.

My mistake: assuming “film is film.” Not all stained glass window films are UV‑stable. Look for ones specifically rated for exterior exposure (even inside, UV passes through glass). I now pay $40‑60 for a quality 3M or Gila film. Still cheaper than replacing the window, but you have to factor in installation time and potential redo costs. Don’t let the $29 sticker fool you.

4. Milk glass – is it just a style trend? What should I know before ordering?

Milk glass pops up in renovation blogs as a “classic” look. I ordered a milk‑glass pendant for a client’s bathroom in Q4 2023. $89. Looked stunning on arrival. Then I realized: the glass shade was only rated for 40W incandescent, and the bathroom had a 60W LED driver (different base). Had to buy an adapter and a dimmable LED bulb. Added $24.

More importantly, milk glass is opaque – you can’t see the bulb clearly, but if the finish is uneven, light leaks look awful. Check the shade’s fit before hanging. That mistake cost me a second trip to the hardware store. Small, but the annoyance added up.

Here’s what I wish I’d asked: Is the glass truly opaque? Does it have a UL listing for damp locations? Milk glass is beautiful, but it’s not a one‑size‑fits‑all solution. Even $89 can turn into $120 after accessories and time.

5. How much does ceramic coating cost – and is it worth it for a bathroom?

This one’s a bigger number. I’ve spec’d ceramic coating for shower tiles and sinks on three projects. The prices vary wildly:

• DIY spray‑on kit (e.g., Cerakote): $50‑80 per shower – but you need perfect prep, no dust, and good ventilation. I tried it. The result looked splotchy after two months. Ended up hiring a pro.
• Professional ceramic coating (applied by a certified installer): $400‑700 for a standard shower enclosure (walls + floor). That includes surface prep, two coats, and a warranty.

In November 2023 I cheaped out on a $60 DIY kit for a client’s master bath. After 6 weeks the coating started peeling near the drain. Had to strip it, pay a pro $550 to do it right. Total cost: $610 vs $550 if I’d gone pro from the start. And the client waited an extra week.

The TCO takeaway: Ceramic coating isn’t cheap. But the real cost of a bad DIY job is the redo + lost trust. Now I always budget for professional application in my quotes. That $60 kit wasn’t a bargain – it was a $610 lesson.

What’s the common thread?

Every mistake came from focusing on the upfront price – the faucet cost, the film price, the coating kit. I ignored installation complexity, compatibility, durability, and my own time.

I now calculate TCO before buying anything. That means writing down:
- Sticker price
- Tools/adapters needed
- Expected lifespan
- Likelihood of redo or call‑back
- My labor (even if I don’t charge myself, time is real)

Don’t hold me to exact numbers, but roughly speaking, the “cheap” option cost me 2‑4× more in the long run. Trust the advice I ignored: spend the extra on quality and proper specs. Your future self – and your wallet – will thank you.