Acrylic Tub Base Is Cupped Outward Won't Bed Flat, Need Ideas - Kitchen & Bath Remodeling - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Remodeling > Kitchen & Bath Remodeling

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree7Likes
Reply
 
Thread Tools
Display Modes
Old 02-02-2019, 01:25 PM   #16
Newbie
 
Join Date: Feb 2019
Posts: 14
Rewards Points: 28
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by Texasdiyer View Post
Jesus, just throw it in the trash and buy a nice new one for God's sake
Like @Yodaman was saying, its $$. If you have the cash I won't be offended if you'd like to donate to a new unit

Most folks will make an attempt to either fix or replace if that option is available IMHO. And for the $1200 or so I have into the purchase, I can use that to cover half of the wifes grad school bill this semester, or a new pair of HT towers, or a new low stall torque converter for the truck, etc..

I had less than $700 to my name when I got divorced years ago, took my "half" of the bills but she got to keep the house. I got hosed but Fk it w/ diligent savings and DIY I'm now in a house 3x the size(not out of choice per se but when the market is slim get what you can), I have full gym in the basement, a HT surround sound that surpasses anything you'll experience at an IMAX and everything is paid for.
I'm not rich, I'm not well off but everything I own is mine and being a tight wad pays off 99% of the time and has helped me be financially secure.
jimfarwell and Nealtw like this.
powerlifter405 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-02-2019, 01:30 PM   #17
Newbie
 
Join Date: Feb 2019
Posts: 14
Rewards Points: 28
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by Texasdiyer View Post
All I'm saying is if you're just going to rig it, it's eventually going to fail and leak so might as well just do it right the first time.
I hear that and that is my preference.

I'm trying to find a viable option, 1st being an exchange if the manufacture is willing to do so. The plumbing manager at the store said they "may" be able to figure something out but I need to have exhausted attempts w/ Mansfield first.

IF I can't, I may try to access part of the osb from the bottom. W/ marine grade epoxy or if I can get gel coat (for fiberglass)it will act as filler between the OSB and acrylic and won't crack or leak since the acrylic will never be breached. But if that doesn't work or doesn't appear viable, I'll have to just purchase a new one.
powerlifter405 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-02-2019, 01:32 PM   #18
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 29,109
Rewards Points: 1,874
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by powerlifter405 View Post
Like @Yodaman was saying, its $$. If you have the cash I won't be offended if you'd like to donate to a new unit

Most folks will make an attempt to either fix or replace if that option is available IMHO. And for the $1200 or so I have into the purchase, I can use that to cover half of the wifes grad school bill this semester, or a new pair of HT towers, or a new low stall torque converter for the truck, etc..

I had less than $700 to my name when I got divorced years ago, took my "half" of the bills but she got to keep the house. I got hosed but Fk it w/ diligent savings and DIY I'm now in a house 3x the size(not out of choice per se but when the market is slim get what you can), I have full gym in the basement, a HT surround sound that surpasses anything you'll experience at an IMAX and everything is paid for.
I'm not rich, I'm not well off but everything I own is mine and being a tight wad pays off 99% of the time and has helped me be financially secure.
If you do get that to sit in there will the water drain or will it have a puddle in the middle?
Nealtw is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-02-2019, 01:45 PM   #19
Newbie
 
Join Date: Feb 2019
Posts: 14
Rewards Points: 28
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by Nealtw View Post
If you do get that to sit in there will the water drain or will it have a puddle in the middle?
The inside of the tub is fine, unless your standing in it, then you have the flex. The original acyrlic shell has its correct shape but w/ weight applied there is the lower area.

I water tested everything and it's perfect, until you stand inside.

I outlined the area in pencil that give is felt, and it remained constant for all 3 mortar bed attempts. Exactly in the same area, after try #3 I knew there was a problem else where.
Attached Thumbnails
Acrylic tub base is cupped outward won't bed flat, need ideas-20190202_124226.jpg  
powerlifter405 is offline   Reply With Quote
Old 02-02-2019, 01:56 PM   #20
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 29,109
Rewards Points: 1,874
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Where I live no one puts anything under them, if you put the mortar down flat the tub isn't stiff enough to push the mortar out of the way.
If you need anything at all it would be just that area that would need it, put a straight edge across the legs and measure just how thick it should be in the middle and shape the mortar to fit it.
Nealtw is online now   Reply With Quote
Old 02-02-2019, 02:35 PM   #21
Newbie
 
Join Date: Feb 2019
Posts: 14
Rewards Points: 28
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by Nealtw View Post
Where I live no one puts anything under them, if you put the mortar down flat the tub isn't stiff enough to push the mortar out of the way.
If you need anything at all it would be just that area that would need it, put a straight edge across the legs and measure just how thick it should be in the middle and shape the mortar to fit it.
I"d argue that just because thats how folks do it out there doesn't make it correct.
W/o a mortar bed, there is no support under parts of the tub and the fiberglass/osb/acyrlic combo flexes under the weight. I'm having that issue in the basement, shower pan w/ no mortar bed and it has begun to crack.

I'm thinking your missing the issue.
Mortar bed or no mortar bed the tub has defects. I have done 3 separate mortar beds. It's not a bedding issue.

No amount of shimming, bedding or boarding ( already tried that as an experiment 2 weeks ago) will fix that fact that the OSB is cupped outward, creating an air gap between the OSB and acrylic. Think of it as a sandwich w/ a but the bread is stiff and cupped outward or cup your hands etc..

I appreciate the ideas but you're moving in the wrong direction.
For now I'll wait to hear back from Mansfield, then pick an alternate if that falls through.
powerlifter405 is offline   Reply With Quote
Old 02-02-2019, 02:39 PM   #22
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 29,109
Rewards Points: 1,874
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by powerlifter405 View Post
I"d argue that just because thats how folks do it out there doesn't make it correct.
W/o a mortar bed, there is no support under parts of the tub and the fiberglass/osb/acyrlic combo flexes under the weight. I'm having that issue in the basement, shower pan w/ no mortar bed and it has begun to crack.

I'm thinking your missing the issue.
Mortar bed or no mortar bed the tub has defects. I have done 3 separate mortar beds. It's not a bedding issue.

No amount of shimming, bedding or boarding ( already tried that as an experiment 2 weeks ago) will fix that fact that the OSB is cupped outward, creating an air gap between the OSB and acrylic. Think of it as a sandwich w/ a but the bread is stiff and cupped outward or cup your hands etc..

I appreciate the ideas but you're moving in the wrong direction.
For now I'll wait to hear back from Mansfield, then pick an alternate if that falls through.
OK clear this up for me, the cup is a bulge that shows up in the center?
YES? NO?
Nealtw is online now   Reply With Quote
Old 02-02-2019, 03:27 PM   #23
RRH
Member
 
Join Date: Nov 2016
Posts: 679
Rewards Points: 1,358
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by Texasdiyer View Post
Jesus, just throw it in the trash and buy a nice new one for God's sake
Have to agree. He just gave the short answer.

See if you get lucky and maybe a manufactures warranty that will get you a replacement.

Other wise buy a new one. Sounds like a defective tub. Bathtubs should last an anywhere from 20 to 50 years.
Why go thru all the trouble and finish walls and install. If you know the chances are you will have to do it again in a few years.

So buy a new one.
Use that time from the future second install. To hire yourself out to install one, or do another job. Should come out way ahead money wise. If money is tight.
RRH is offline   Reply With Quote
Old 02-02-2019, 05:51 PM   #24
Member
 
Join Date: May 2013
Location: Houston, Texas
Posts: 636
Rewards Points: 1,272
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


I've probably replaced a dozen of these type of tubs (and shower pans too) because that little flex spot finally cracked - it really pisses the homeowners off something fierce.
195795 is offline   Reply With Quote
Old 02-06-2019, 04:54 PM   #25
Member
 
Join Date: Aug 2011
Location: Washington, DC area
Posts: 2,183
Rewards Points: 1,030
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


From your description it's not 100% clear to me what's happening. Are you saying that the bottom of the tub has some (too much?) flex, and when you press the tub down into the mortar, the bottom of the tub then flexes back up slightly? Like a baking sheet when it cools sometimes pops into shape?

If that's the case, and you simply must use this particular tub, your solution is to keep it from flexing when you press it down. Build some ribs into the outside bottom of the tub. This should keep it from flexing when you press it into the mortar. Depending on the shape of the bottom of the tub, and the clearance between the bottom of the tub and the subfloor, use some 1x2s and some construction adhesive, or maybe some aluminum angle and epoxy...use your imagination. Just something to keep the bottom from flexing while you press it into the mortar.

Alternately, if there's insufficient clearance below the tub, or if building ribs is a hassle to you, maybe this: get yourself a piece of ply about the same size as the tub bottom. Line the tub with plastic sheeting, fill the bottom with spray foam, press the ply into the top of the foam. Let it cure. Do the mortar business. The foam should help keep the shape of the bottom constant as you press it down into the mortar. After the mortar cures, remove the foam.
huesmann is offline   Reply With Quote
Old 03-18-2019, 09:51 AM   #26
Member
 
Join Date: Aug 2018
Location: Canada 🍁 ON
Posts: 84
Rewards Points: 168
Default

Re: Acrylic tub base is cupped outward won't bed flat, need ideas


Quote:
Originally Posted by powerlifter405 View Post
No amount of shimming, bedding or boarding ( already tried that as an experiment 2 weeks ago) will fix that fact that the OSB is cupped outward, creating an air gap between the OSB and acrylic. Think of it as a sandwich w/ a but the bread is stiff and cupped outward or cup your hands etc..
That might be hard to fix. Try to find a local marina and ask anyone with boat building experience.
Also, You might try to drill holes and fill the gap with structural low-expansion foam with 5lbs rating:
http://www.multitechproducts.com/pol...-5-lb-density/

Talk with the manufacturer to confirm the application.

Finally, if you bought it with CC, check with the bank as some cards offer extra protection / extended warranties/return times.
misuszatek is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sink base vs regular base cabinets... J187 Kitchen & Bath Remodeling 3 12-03-2010 08:40 AM
Installing acrylic shower base onto concrete floor Dawna106 Flooring 0 10-15-2010 06:42 PM
Base molding help...need ideas Lillbush555 Carpentry 9 09-19-2010 08:38 PM
Shower base mortar mix with acrylic fortifier zootjeff Plumbing 1 06-09-2010 06:42 AM
How to tile around a Pre fab shower base geoffthemonk Building & Construction 1 11-07-2009 10:10 AM




Top of Page | View New Posts