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What Is Armorcore Reinforcement on Ella Shower Stall Walls and Why Does It Matter?

Armorcore is the name Ella's Bubbles uses for the reinforcement built into the walls of its AcrylX shower stalls and multi-piece shower kits. It sits behind the AcrylX acrylic surface on a fiberglass reinforced shell, and the product pages describe it as reinforced walls on all sides, which is what lets grab bars and seats anchor into the wall itself. The finish that goes over it is explained in What is AcrylX and how does it compare to acrylic?, and this page covers the reinforcement and what it means for your bathroom.

What the Published Documents Say Armorcore Is

An Ella one-piece E-series stall or three-piece low-threshold kit is built in layers, and each layer has its own job:

  • The fiberglass reinforced shell. The fiberglass gives the unit its shape and strength.
  • The AcrylX finish. Ella's product pages describe AcrylX as a long lasting applied acrylic finish. It is the surface you see and touch.
  • The Armorcore reinforced walls. This is the reinforcement behind the surface, described as reinforced walls on all sides.

You get an acrylic bathing surface on a rigid fiberglass shell, with walls made to carry hardware. The published Ella documents name Armorcore and say what it does. They do not publish a material recipe or a thickness for the core, so this page does not give one. For how the panels and finishes fit together across the shower line, see What Are Acrylic Shower Walls and How Do They Work?.

Which Ella Shower Products List Armorcore

Armorcore appears on Ella's made-in-the-USA AcrylX stalls and kits. It is not printed for the older gel coat units or for the sheet acrylic wall kits. The table below uses only what the current published documents print.

ProductFinish and constructionArmorcore reinforced wallsPrinted warrantyWhat it means for you
One-piece E-3648 stall, 48 by 37 by 80 inchesFiberglass reinforced with AcrylXListed, on all sidesLifetime Limited Residential, 30-Year CommercialReinforced walls and the longest printed term in the shower line
One-piece Millennial stall, 42 by 42 by 80 inchesAcrylX with ArmorcoreListedLifetime Limited Residential, 30-Year CommercialSame construction and term as the E-3648
Three-piece 60 by 33 inch molded seat kitFiberglass reinforced with AcrylXListednot listedSame construction as the one-piece stalls. Read the warranty document packed with the kit.
Legacy ESM series one-piece stallsGel coat finish over fiberglassnot listed3 year limitedOlder finish with a shorter printed term
Low-threshold gel coat multi-piece showersGel coat finish over fiberglassnot listed3 year limitedSame term as the ESM stalls
Acrylic three-piece wall kit, 60 inch back panel, 40 inch side panels0.118 inch ABS and PMMA composite with a glossy sanitary acrylic surfacenot listednot listedA glue-up sheet panel and a different product from a molded AcrylX stall

The pattern follows the finish, not the size or the number of pieces. If your unit is described as AcrylX, its walls are described as Armorcore reinforced. If it is a gel coat unit or a sheet acrylic wall kit that glues to your own wall, Armorcore is not part of its published description. In that case, ask about backing for grab bars before the walls go up. The formats are compared in What Are Acrylic Shower Walls, and Are They Worth It?.

What Armorcore Means for Grab Bars and Seats

The practical benefit is flexibility. On an ordinary thin shower surround, a grab bar needs wood blocking in the stud wall behind it, and that blocking has to be planned before the surround is installed. Ella shower stall walls are manufactured with reinforced backing, so a bar anchors into the wall itself and no wood blocking is added behind it. The product pages say grab bars and seats can be mounted anywhere on the wall. That matters when a bather's needs change after the shower is installed, because a second bar or a seat does not mean opening the wall.

Every model also has a published Specification drawing, and that drawing documents the reinforced areas. Use the drawing to decide where a fastener goes. Do not drill trial holes. A sound sequence looks like this:

  1. Find the reinforced zones on the Specification drawing for your model. It is published with the product listing where you purchased, under the manufacturer resources.
  2. Transfer the zones to the wall with a pencil and tape measure.
  3. Drill only where the bar's screws will actually go. Each unnecessary hole in a shower wall is a possible path for water behind the surround.
  4. Use the hardware and instructions packed with the bar. The right fastener depends on the bar's flange, its rated load and the anchor system its maker supplies.

The full method, including what to do when you cannot find the drawing, is in Mounting Grab Bars on Ella Shower Walls: Reinforced Backing, Finding the Zones, and Which Screws to Use. If your shower shipped with Ella grab bars, the team at (800) 480-6850 can confirm the mounting hardware for those bars from your model and serial number.

Armorcore and the Printed Warranty

Armorcore shows up in the warranty wording because the longer printed term belongs to the AcrylX with Armorcore construction. The AcrylX with Armorcore one-piece stalls, including the E-3648 and the Millennial unit, print a Lifetime Limited Residential Warranty and a 30-Year Commercial Warranty. The legacy ESM series stalls and the low-threshold gel coat multi-piece showers print a 3 year limited warranty.

For the three-piece molded seat kit, the pages gathered in this knowledge base do not print a term, so read the document packed with your unit. You can also confirm from your model number with your Ella dealer or the team at (800) 480-6850. Each line is laid out in What warranty covers Ella shower stalls, bases and wall kits?.

Drilling inside the reinforced zones for a grab bar is an expected part of installation and does not affect your coverage. That is one more reason to work from the drawing and not from guesswork.

Caring for the Surface over the Reinforcement

Armorcore is behind the wall, so it needs no care. What you clean is the AcrylX surface in front of it, and Ella's care instructions treat AcrylX exactly like any acrylic fixture. The one rule in every Ella care document is no abrasives.

  • Clean with warm water and liquid detergent, or with a non-abrasive cleanser made for fiberglass bathroom fixtures.
  • Never use scouring powders or pads, and never use steel wool.
  • When you mount a bar or seat, seal as the bar's instructions direct so water stays on the bathing side of the wall.

How to Confirm Your Shower Has Armorcore Walls

Check the product name and the documents that came with the unit. The AcrylX name and the words Armorcore reinforced walls appear on the product pages and published documents for the one-piece E-series stalls and the three-piece low-threshold kits. A unit described with a gel coat finish belongs to the older family. If you are unsure which you have, open a ticket at ellasbubbles.com/support with your model number, or call (800) 480-6850, and the team can send the Specification drawing for your model.

Common Questions

What is Armorcore made of inside the shower wall?
The published Ella documents describe Armorcore as reinforced walls on all sides, behind the AcrylX finish on a fiberglass reinforced shell. They do not print a material recipe or a thickness for the core. For construction details on a specific model, ask for its Specification drawing at ellasbubbles.com/support or (800) 480-6850.
Can I mount a grab bar anywhere on an Armorcore wall?
The product pages say grab bars and seats can be mounted anywhere on the wall, because the walls are reinforced on all sides. Still check the Specification drawing for your model first, because it documents the reinforced areas. Drill only where the bar's screws will go.
Do I need wood blocking behind an Ella shower stall for grab bars?
No. Ella shower stall walls are manufactured with reinforced backing, so a bar anchors into the wall itself without added wood blocking. Use the hardware and instructions supplied with the bar.
Does drilling into the reinforced wall affect my shower warranty?
Drilling inside the reinforced zones for a grab bar is an expected part of installation and does not affect your coverage. Find those zones on the Specification drawing instead of drilling test holes. For any other modification, check with the team at (800) 480-6850 before you drill.
Do the older gel coat Ella stalls have Armorcore walls?
Armorcore is not listed for the legacy ESM series stalls or the low-threshold gel coat multi-piece showers. Their published documents describe a gel coat finish over fiberglass and print a 3 year limited warranty. Your Ella dealer or the team at (800) 480-6850 can confirm the details of an older unit from its model number.
Is Armorcore the same thing as the AcrylX finish?
No, they are two parts of the same construction. AcrylX is the applied acrylic finish you see and touch, and Armorcore is the wall reinforcement behind it. They are named together on the one-piece stalls that print the Lifetime Limited Residential and 30-Year Commercial warranty.

About this guide. Answers in the Ella’s Bubbles Support Center are compiled from real conversations with tub owners, our technicians’ notes and the product documentation, then reviewed by our team. Tub models and options have evolved over the years, so a detail here may differ slightly from your exact tub. If something looks different on yours, send us your serial number and a specialist will confirm it for your model.

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