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Install Grab Bars in Fiberglass Showers — Anchored Directly Into Studs

The Solid Mount® is the original stud-mounted grab bar installation system for fiberglass tubs and showers — established 1997.

Independently load tested to exceed 300 lbs. of structural support

Actual grab bar installation in action

Install Grab Bars in Fiberglass Showers — Anchored Directly Into Studs

The Solid Mount® is the original stud-mounted grab bar installation system for fiberglass tubs and showers — established 1997.

Independently load tested to exceed 300 lbs. of structural support

Actual grab bar installation in action

install grab bars in fiberglass showers

Engineered for Structural Grab Bar Installation in Fiberglass Showers

Originally patented in 1997, The Solid Mount® was engineered to solve the structural gap between fiberglass shower walls and the wood studs behind them.

Unlike surface-mounted anchors, it transfers grab bar loads directly into the wall framing — not the fiberglass panel.

Designed specifically for fiberglass tubs and showers. Proudly made in the USA.

Why Fiberglass Showers Need a Different Grab Bar Solution

Heart of The Solid Mount

Look for the distinctive ‘Heart of The Solid Mount®’ mounting configuration

Install Grab Bars in Fiberglass Showers the Right Way

Fiberglass shower and tub walls are thin composite panels — not structural supports for body weight.

Many mounting methods rely on the fiberglass surface itself, including:

  • Suction cups

  • Toggle anchors

  • Hollow-wall anchors

  • Compression fittings

Without structural backing, fiberglass can flex, compress, or crack under load.

For a grab bar to function as a safety device, the load must transfer into the wall framing — anchored directly into the wood studs behind the enclosure, never the fiberglass panel.

Stud-Mounted vs Hollow-Wall Anchors in Fiberglass Showers

When installing grab bars in fiberglass showers, the mounting method determines whether load is transferred into the structural framing of the wall — or into the fiberglass panel itself.

Feature Hollow-Wall Anchor Stud-Mounted System (The Solid Mount®)
Anchors into wood stud ❌ No ✔ Yes
Relies on fiberglass strength ✔ Yes ❌ No
Transfers load into wall framing ❌ No ✔ Yes
Designed for fiberglass cavity gap ❌ No ✔ Yes
Structural load path Surface compression Direct stud transfer
In fiberglass enclosures, structural anchoring into wall studs is the only method that transfers load into the framing of the home.

What Shower and Grab Bar Installation Guidelines Require

 Manufacturer installation instructions commonly specify that grab bars must be secured into wall studs or approved structural backing.
View published installation references from major manufacturers

Why Use The Solid Mount® in a Fiberglass Shower

A Structural Mounting System — Not a Surface Anchor

The Solid Mount® is engineered to secure grab bars directly into the structural wood studs behind fiberglass shower and tub enclosures.

Rather than relying on compression against the fiberglass panel, the system bridges the cavity between the enclosure and the framing, allowing load to be transferred into the structure of the home.

This creates a stable, permanent mounting point designed specifically for fiberglass installations.

How Fiberglass showers look from behind

Rear View of a Fiberglass Shower Enclosure

For fiberglass shower installations where direct stud anchoring is required, The Solid Mount® provides a structural mounting solution designed specifically for this application.

2 Installed Grab Bars

A Grab Bar Installed into a Fiberglass Shower

*On a 2.5″ flange grab bar you will have a 1/4″ white ring of the mount showing

Designed for Structural Installation

  • Anchors directly into wood studs

  • Transfers load into wall framing

  • Works with standard 3″ flange grab bars

  • Compatible with common fiberglass showers and tubs

  • Step-by-step installation video available online

▶️ Watch the Installation Video

Install with structural confidence — anchored directly into wood studs.

Compatible with standard 2.5″ and 3″ flange grab bars • Designed for fiberglass showers and tubs
Note: When used with a 2.5″ flange grab bar, approximately 1/4″ of the mount may remain visible around the flange.

Posted on Amazon
Ken
August 19, 2026
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
ADA safe works wonders for grab bars . great solution for common problem.
Posted on Amazon
Joan
July 17, 2026
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
It works! This makes a hair raising job a snap. Great product, excellent video and easy to follow instructions. The only surprise was to find out there was no sheetrock behind the shower insert.
Posted on Amazon
Sophie
February 24, 2026
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
Feels very sturdy. No flex at all.Feels very sturdy. No flex at all. The bar feels solid as a rock mounted with Solid Mount.We bought another type installation bracket that was advertized on the safety bar packaging as 'compatible with'. Very popular brand. Examining our shower walls we could feel a little flex, so this system of mounting just on the fiberglass wall did not seem right to us. Maybe it would be fine if all you need is a little balance help. But we did not want to worry about whether or not the bar would hold, and not cause damage to the shower, if someone did slip and needed it to support their weight. We found Solid Mount. Glad we did.It's DEFINATELY disconcerting sawing a 2" hole in the wall, but, a good a stud finder, and the excellent directions gave us the confidence.We felt that if you are going to put a bar in for safety, and putting a hole in the wall anyway, go with the most secure system. We have every confidence this bar will be secure and be able to hold weight.
Posted on Amazon
S.
January 16, 2026
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
Product works as advertised, is easy to install and is perfect for fiberglass tub/shower surrounds.Product works as advertised, is easy to install and is perfect for fiberglass tub/shower surrounds. Great product and easy to install. My 1978 house has two fiberglass bathroom surrounds, one is a shower stall and the other a bathtub. I was worried about how to attach a safety grab bar on the fiberglass but with this product and the superb video and printed instructions, installation was a breeze. the most difficult part was finding the wall studs behind the fiberglass. After that, it was full speed ahead, drilling the holes and mounting the bar. There was no drywall between the fiberglass shower surround so the SolidMount was about the only option. Buy this product, it works great. Just follow the directions
Posted on Amazon
Jett2502
September 8, 2025
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
This provides a strong permanent attachment point I purchased 3 of these kits (for 3 grab bars) and am glad I did. Takes about an hour to install one kit for each grab bar however it is well worth it. Instructions are easy to follow (video is also available), everything works as advertised. Provides a good, strong base anchored to stud behind shower/tub unit. This is a great way to add grab bars inside a shower/tub unit.
Posted on Amazon
Mike
April 20, 2024
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
sturdy anchor for grab bar. Very sturdy and the instructions are easy to follow for anyone with a little diy experience and equipment
Posted on Amazon
Amazon
October 7, 2023
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
Did the Job! I watched a few videos of the installation process before I even purchased this item, to ensure it would serve my purpose.Additionally, I needed to modify some of the steps for my specific application. (I was using a grab bar with square escutcheons and the distance from the inside of my shower wall to the stud was slightly longer, to name a couple).It can be tricky if you are not experienced at this type of thing. Drilling the 2” holes through the shower wall provide a little wiggle room (approximately 1/4” tolerance) to play with. Once you get the one side attached, you can then mark where the other side will need to go, maintaining the location over the stud. Here is a tip: Read all the instructions carefully, maybe more than once. Watch the video. DO NOT USE POWDER TOOLS for this installation, with the exception of drilling the holes. And use a hole saw bit designed to cut through fiberglass! They sell them on Amazon. You will thank me in the end. I suggest you use a socket wrench with an extension to drive the lag bolts into the studs instead. This also allows for removal, should you need to do so. Also, pre-drill into the studs with a slightly larger drill bit than recommended in the instructions. Scraping your bolt threads across a bar of soap will allow the bolts to go into the studs more smoothly.To fit the square escutcheon, I simply trimmed four sides of the round mounting cover plate. I installed the plates, screwing them down to the proper depth without using the caulk, so that I could mark the mounting plates for the square escutcheons first. Then removed them, trimmed them appropriately 1/8” on the 4 marked sides using a hack saw, and file. Then reinstalled them with the caulk, per the instructions. I did this for both ends, which ensured where to mark the edges for the trimming. Also measure many times, drill once!I ended up purchasing 2 kits so I could extend the mounts, as my shower walls were approximately 1/4”-1/2” further from the studs than the mounts provided for.All in all, it is a very solid system. And even though I modified my installation slightly, it is all still very solid. I am happy I went with the original Solid Mount brand.
Posted on Amazon
BigRed
July 26, 2023
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
Problem solver Just had an acrylic shower surround installed in my elderly mother’s house due to a leak in her shower. Previously , she had marble tile and three grab bars . As soon as the panels were installed I realized that they flexed and wouldn’t really support grab bars . That’s when I found these mounts . They’re basically heavy duty spacers . Simple idea , implemented well. Luckily the guy who installed my shower had reinforced areas where he noticed I previously had bars. He was so happy to see these mounts and had no problem installing them. They were fairly intuitive for him to install. Don’t think he even read instructions . They absolutely work like a charm to give a solid foundation to the HEAVY BRASS GRAB BARS that I have. Perfect . Thanks for a great product. Edit: i did order an extra set at the time of purchase . Needed two sets , ordered three. It worked out very well because if i remember correctly, he ended up needing one more spacer , which he took put of the third set . Fine with me because its a seamless, sturdy, installation, And worth every penny spent on this product, even with an extra set only partially used . Buy them and maybe an extra set , also.
Posted on Amazon
Phramed
June 21, 2022
Amazon star 1Amazon star 2Amazon star 3Amazon star 4Amazon star 5Verified
should be 5 stars but.... I found the finished result to be extremely sturdy and relatively easy to install if you have a good stud finder. I would suggest location the studs before ordering the kit or kits, as i had planned to put two bars inside the shower. I ended up placing a second 12" bar against a wall at the outside edge of the front of the shower and didnt need the second kit. Another issue or my screw up I had was with the instructions: the fiberglass shower inserts themselves have some contours in relation to the the stud position. The distance between the mounting stud and the outside dimension of the fiberglass can be very different, To that point, in my case, i had to add a washer on one to bring it flush. The second mount was about an 1 1/2" deeper than the first support. The other thing i didnt do, is secure the first Solid Mount install with two screws to accurately mark and position the second mount. I used one screw. The flange covers do snap over the actual grab bar portion but by not using two screws to secure, i was 1/8" shy on one mounting plate . I think i could have corrected it by carefully removing the grabar and one support, but i didn't. The cosmetics arent terrible and the installation is extremely solid. The product itself is excellent and the instructions nearly perfect except the small caveat i describe, which for some, might not be small. I would not make the same error again but I doubt i will ever have to do it again since i am 80. In fairness to this great product I could have missed something on the instructions and this was just my experience. If i did, my apologies to Solid Mount and my review should be 5 stars.
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