Licensed · Insured · Bonded · CA Lic. #1066959
Premium Central Valley Remodeling Built on the Paragon Standard.
We don't just build beautiful spaces. We engineer them to last a lifetime. Discover why discerning homeowners choose structural integrity over cheap cover-ups.
No Blind Guesses. No Over-the-Phone Estimates.
Paragon Project Assessment
5-Star Google Rated
Award-Winning Contractor
Licensed, Insured & Bonded
Paragon Standard Author
Published Author
Paragon Standard Remodeling Series
Don't hire a contractor who guesses. Hire the expert who literally wrote the book on proper installation methodology. Antonio Topete Diaz documented the exact failure patterns behind leaking showers, failed shower pans, and faulty waterproofing — and built a company that holds every project to that published standard.
Talk to the AuthorThe Paragon Difference
Most Remodels Look Good
For About Three Years
Then the tile cracks. The grout fails. Water gets behind the wall. The cabinet doors sag. Not because the finishes were cheap — because the structure underneath wasn't built correctly. We fix that problem before it starts.
Structure First
Every project starts with what's behind the wall — waterproofing, framing, blocking, plumbing, and electrical. We build the foundation before we touch a single finish material.
Function Second
The layout has to work for how you actually live. We plan around your habits, your body, and your daily routine — not around what looks good in a photo.
Beauty Third
When the structure is right and the function is dialed in, the finishes are the easy part. And because the foundation holds, they stay beautiful for decades — not seasons.
Understanding the Problem
Bathrooms Don't Fail Overnight
In the Central Valley, homes deal with hard water, temperature swings, and aging plumbing infrastructure that accelerates the timeline on bathroom problems. The damage is usually well underway before anything visible appears.
01
Waterproofing Installed as an Afterthought
A waterproofing membrane applied without proper overlap, pre-sloped mortar, or sealed penetrations isn't a system — it's a delay. Water moves through grout, around drains, and behind fixtures continuously. The question is only where it ends up.
02
Tile Set on the Wrong Foundation
Tile adhered to standard drywall, improperly gapped backer board, or an unsupported mortar bed will crack and delaminate. No amount of regrouting addresses the underlying movement. The substrate has to be right before the first tile goes down.
03
Penetrations Left Unsealed
Drains, supply lines, niches, and fixture backing are each a gap in the waterproofing envelope. When they're not sealed as part of the system, water finds them — and follows the path of least resistance into the framing and subfloor.
04
Drainage That Doesn't Drain Completely
A shower floor with insufficient slope holds water after every use. Chronic standing water breaks down grout, saturates the substrate, and creates conditions for mold growth inside the wall cavity — none of which is visible from the outside.
05
Structural Work That Was Never Done
Grab bar blocking not installed in the framing. Subfloor not assessed before new tile adds weight. Tub deck not properly supported. These aren't finish problems — they're structural decisions that determine whether the bathroom holds up for five years or twenty-five.
06
The Patch That Bought Time
Recaulking over active moisture. Replacing surface tile without addressing what's underneath. These are not repairs — they're postponements. And the longer the underlying problem continues, the more expensive the eventual correct repair becomes.
Every project starts with an honest assessment of what's actually there — not just what's visible. We look at the full picture before we commit to a scope.
Request a Structural AssessmentClient Stories
What Our Clients Say
"We'd had a bathroom remodeled years ago by someone else. Within two years the tile was cracking and water had gotten behind the walls. ParagonCA tore it out, showed us exactly what had been done wrong, and rebuilt it correctly. That was four years ago — not a single issue since."
Margaret & Robert T.
Modesto, CA
Master Bathroom Rebuild
"After a water damage claim, my insurance contractor did a patch job. ParagonCA came in, found the real source of the problem, and fixed it properly. They documented everything, worked with my adjuster, and the result was better than the original kitchen. I cannot say enough."
Carol S.
Oakdale, CA
Kitchen — Water Damage Reconstruction
"We interviewed four contractors. ParagonCA was the only one who talked about what was behind the walls before talking about tile and countertops. That told us everything we needed to know. The project came in on time, on budget, and built to last."
James & Patricia H.
Tracy, CA
Full Kitchen Remodel
What We Do
Our Specialties
Kitchen Remodeling
We start with the structure — waterproofing, framing, plumbing, and electrical done to exceed code. Then we build the layout around how you actually cook and live. The finishes come last, and they last.
Learn More
Bathroom Remodeling
Most bathroom failures start behind the wall. We open it up, do it right, and close it back up with craftsmanship you can see. Waterproofing, tile, fixtures, and finishes — built to hold for decades.
Learn More
ADA & Accessibility Remodeling
Structural modifications, proper blocking, load-bearing considerations — accessibility done correctly requires more than grab bars. We engineer it right so it performs for life, and design it so it looks intentional.
Learn MoreCorrective Remodeling
Leaking Shower. Failed Waterproofing. Previous Contractor's Mistake.
We find the source — not just the symptom. Whether it's a shower that's been leaking into the subfloor for two years, tile that was set on the wrong substrate, or a waterproofing system that was never installed correctly — we open it up, document what we find, and rebuild it to the standard it should have been built to the first time. No patches. No cover-ups. No band-aids over a systemic failure.
How We Work
The Paragon Process
Discovery Consultation
We listen first. We ask about how you use the space, what's failing, and what you need it to do — before we ever talk about finishes.
Structural Assessment
We assess what's behind the walls before we commit to a scope. No surprises mid-project. No change orders for things we should have caught.
Precision Build
Structure first. Every installation exceeds code — waterproofing, framing, plumbing, electrical. Finishes are applied to a foundation that will hold.
Final Walkthrough
We walk every inch with you. We don't consider a project closed until you've inspected it yourself and signed off on every detail.
The Paragon Comprehensive Assessment
We Don't Give Blind,
Over-the-Phone Guesses.
Our $0 Initial Structural Assessment is a deep-dive diagnostic of your home's existing framing, plumbing layout, and waterproofing vulnerabilities. We identify structural failure points before a single piece of tile is selected — so your investment is protected for decades.
Framing & Substrate
We assess what's behind the wall before we commit to a scope. No surprises mid-project.
Waterproofing Audit
We identify every gap in the waterproofing envelope — membrane, penetrations, drain assembly.
Documented Findings
You receive a written assessment of what we found and exactly what it takes to do it correctly.
About ParagonCA
The Work Starts
Behind the Wall
Most remodeling failures aren't visible on the surface — they're in the waterproofing membrane that was skipped, the substrate that wasn't prepared, the drain assembly that was never sealed correctly. Antonio Topete Diaz spent years investigating exactly these failures before founding ParagonCA. He documented what he found in the Paragon Standard Remodeling Series — published guides on why tile showers leak, why shower pans fail, and what correct installation actually looks like.
Every ParagonCA project starts with a structural assessment — before scope, before budget, before a single tile is selected. We identify what's there, document what needs to change, and build the system correctly from the substrate out. Finishes come last, not first.
- Waterproofing membrane installed and tested before any finish work begins
- Substrate preparation to manufacturer spec — no shortcuts on the foundation
- Structural assessment before any scope is finalized
- One team, one standard — every professional on your project is held to the Paragon Standard
- CA Licensed, Insured & Bonded — Lic. #1066959
The Published Standard
We Wrote the Book.
Literally.
Antonio Topete Diaz is the author of the Paragon Standard Remodeling Series — published guides documenting the exact failure patterns he's investigated in the field and the correct methods for fixing them. These aren't marketing materials. They are the standard every ParagonCA project is built to.
If your tile shower is leaking, your shower pan is failing, or you're about to remodel and want to know what questions to ask — these books were written for you. The same knowledge that goes into every project is documented here, in plain language.
"Do it right — or don't do it at all."Talk to the author about your project
Leaking shower?
Why Shower Pans Fail
The hidden mistakes that cause bathroom leaks — and what correct installation actually looks like.
Cracked grout? Wet walls?
Why Tile Showers Leak
The structural failures behind bathroom water damage that no surface repair can fix.
Planning a remodel?
The Paragon Standard
Before you remodel, read this. What to ask, what to watch for, and what separates a lasting remodel from one that fails.
ADA or aging-in-place?
Designed to Endure
Accessibility, independence, and prepared remodeling — built into the structure, not bolted on.
Common Questions
What Homeowners Ask Us
The Paragon Network
Need a Different Kind of Help?
ParagonCA operates specialist sites for different regions and service types. Each one is built around a specific homeowner need — not a general contractor's full menu.
Central Valley, CA
Emergency Water Damage
Active leak, water damage, or emergency restoration. Diagnosis-first approach — we find the source before anything is touched.
Go to 209WaterDamage.comEast Bay, CA
East Bay Bathroom Specialist
Bathroom remodeling for East Bay homeowners — same Paragon Standard, built for the East Bay market and its specific housing stock.
Go to EastBayBathRemodels.comStatewide
Brand Authority & Standards
Antonio's credentials, the Paragon Standard Remodeling Series, guarantee tiers, and the full story behind the standard every project is built to.
Visit paragon-ca.comReady to Do It Right?
Schedule your Paragon Comprehensive Structural Assessment. We walk your space, document what's there, and give you an honest picture of what it takes to do it correctly — before a single tile is selected.