FHB Logo Facebook LinkedIn Email Pinterest Twitter X Instagram Tiktok YouTube Plus Icon Close Icon Navigation Search Icon Navigation Search Icon Arrow Down Icon Video Guide Icon Article Guide Icon Modal Close Icon Guide Search Icon Skip to content
Subscribe
Log In
  • How-To
  • Design
  • Tools & Materials
  • Restoration
  • Videos
  • Blogs
  • Forum
  • Magazine
  • Members
  • FHB House
  • Podcast
Log In

Discussion Forum

Discussion Forum

Lowering Cast Iron Toilet Flange

xosder11 | Posted in General Discussion on December 30, 2005 08:07am

A friend of mine (swear it’s not me) had a bathroom that he recently remodled. Part of what prompted the remodel job was that he had floor joists that were bacically rotted to nothing. Also, years back a plumber cut away quite a bit of a bearing wall.

He called me over for advice after he gutted everything and I had to convince him that the entire floor needed to be structurally repaired. The cast Iron tub was over 1 joist that had beed hacked from a 2×10 down to a 2×4 and was completely unsupported at one end! I think the only thing holding the tub in place was the plaster and the tile.

Anyway, I prescribed what he could do to fix it which involved sistering joists and re-leveling everything and I emphasized how important it was that he get the new floor height correct if he wanted to leave the existing toilet flange in place, which he insisted on doing.

Anyway, he missed the mark and now of all things the toilet flange is about 1/4″ too high above the finished marble and the toilet rocks pretty bad.

I told him his problem is now beyond normal shimming and he is asking me for advice.

I have two thoughts: 1. trace the tiolet over a 1/4″ sheet of plywood, cut it w/ a jigsaw, and create one big shim. Calk around the edges and viola!

Or is there a way to lower the flange? (probably not likely right?) I should say is there a way to lower the flange w/out ripping apart his floor he just finished too badly?

P.S. there is no access from below

edit: I also remember him mentioning that he had gotten the extended length toilet and dropped it over the flange, but realised it was too long for his tiny bathroom and rather than have his knees hit the wall, he went with the standard bowl length. The extended length toilet was apparantly not rocking, where this one now is. Are there any toilets that are more forgiving for a higher flange? that may be an easy solution.


Edited 12/30/2005 12:13 pm ET by xosder11

Reply
  • X
  • facebook
  • linkedin
  • pinterest
  • email
  • add to favorites Log in or Sign up to save your favorite articles

Replies

  1. CAGIV | Dec 30, 2005 08:19pm | #1

    In a similiar instance where I had a toilet flange that was sticking up to much coupled with a slope in the floor I made a plate using 3/8" ONYX material, if you're not familiar it's the same type of product as Swanstone. 

    Using a piece of foam pipe insulation as an offset from the toilet base I was able to match the footprint of the toilet, functionaly it served the exact purpose I needed but truth be told it wasn't a perfect fix, It didn't look bad but it didn't look great either, though the homeowners seemed to love it.

    I wouldn't recommend using plywood and caulk, over time the plywood could rot and quickly after installation the caulk probably won't look so hot either.

     

    Team Logo

    1. xosder11 | Dec 30, 2005 08:28pm | #2

      I think that's a good idea to use a better material than plywood. I'll look into that. Thanks.

    2. xosder11 | Dec 30, 2005 08:38pm | #3

      Oooo Oooo
      So I take the piece of swanstone and trace the base of teh poilet and add like 1-1 1/2" around it using the pipe insulation or something to that effect, then give it an ogee edge. Is that like what you did? That might dress up the base of the toilet a little. I think we are getting somewhere here.Now the question is how do you work with swanstone. I need to research the product a little. Where do I get it and how do I cut it?

      Edited 12/30/2005 12:40 pm ET by xosder11

      1. CAGIV | Dec 30, 2005 09:13pm | #7

        I've never worked with Swanstone, from what I'm told it's the same as ONYX which is basically resin and colors.  ONYX cuts and tools with wood working tools, I cut it with a jig saw and sanded the edge into a round over working though sanding grits starting at 120 up to 600, the edge did not end up near as glossy as the top, but it also was not very noticable unless you were on the floor looking.

        To get it we have a local supplier of ONYX however HD also sells it as a speacial order, they also have Swanstone around here.  You could go in and talk to them and see if they could order you a small sheet of it, though I would try to find someone local first as I do not enjoy having to order anything from the box store.

        http://www.theonyxcollection

        http://www.swanstone.com/

        Before doing any of that I'd call my plumber explain the situation and see what he could do with out doing to much damage.  Our plumber has lowered PVC flanges with out any damage to the surrounding surfaces but I do not know anything about cast iron.......other then it's heavy. ;)

         

        1. xosder11 | Dec 30, 2005 09:15pm | #10

          Thanks for the helpfull advice. So you think I could put a nice beaded edge on it with a router?

          1. CAGIV | Dec 30, 2005 09:21pm | #12

            don't know, never tried a router on it myself.

            Like someone else suggested, I do recall seeing marble "risers" under stools in a magazine, might have been an add in the back of fine home building?  If you called a marble/granite fabricator they could probably make you exactly what you want...for a price

            What I did worked, but I really didn't like the way it looked in the end.  I have a picture of it somewhere if I can find it I'll post it.

            I also had a problem of the floor dropping 3/8" from the back to the front of the stool, I was able to shim the plate a little, and the stool a little, and have it not be as noticable as just shimming the stool itself. 

             

  2. DanH | Dec 30, 2005 08:50pm | #4

    You know, another option is to call a plumber and have them lower the flange.

    If ignorance is bliss why aren't more people

    happy?

    1. xosder11 | Dec 30, 2005 09:01pm | #5

      Oh Right! I haddn't though of that : ) Before we call a plumber I was hoping one would come along at this site and suggest how that may be done without ripping apart all his work, or his downstairs neighbors cieling. I mean, how much room do they need. What is the most minimally invasive way of doing it. I don't know what is involved.I just was trying to get an idea of what to expect

      Edited 12/30/2005 1:08 pm ET by xosder11

      1. DonK | Dec 30, 2005 09:12pm | #6

        In the olden days, they made marble "safes", a rectangular platform about 1/2 or 3/4 inches thick, and it went under the bowl. It had a hole in the appropriate location for the waste line. Unlike the other material suggested, this one does not match the bottom of the bowl. I think I gots one in the basement. Interested? Where in the "Northeast" are you and your friend? I'm on Long Island. By the way, plywood is a definite no-no. It will rot, compress and get messy in a heartbeat.  

        Don K.

        EJG Homes      Renovations - New Construction - Rentals

        1. xosder11 | Dec 30, 2005 09:14pm | #8

          Thanks Don,
          I'm in Boston

      2. DanH | Dec 30, 2005 09:14pm | #9

        I missed the line about no access from below, but a clever plumber may be able to cut out the flange from above and fit a new one. Or simply pay the downstairs neighbors to live in a hotel for a couple of days (and maybe see a show) while the deed is done.Toilets do differ in terms of how much clearance they allow for the flange. But there's no real rule, so you'd have to check each one individually. (Probably best approach is to make up a jig with a flange on it and try it on each toilet at the store.)Also, don't use a reenforced wax ring, but rather just solid wax, as the reenforcement takes away thickness.There are several different schemes for raising a toilet, but none that are particularly attractive. Probably the best (least unattractive) would be to remove the marble in the toilet area and raise it up, with a slight "step" of 1/2" or so between that marble and the rest of the floor.

        If ignorance is bliss why aren't more people

        happy?

        1. xosder11 | Dec 30, 2005 09:17pm | #11

          Thanks Dan. I think now your seeing our dilemma.

  3. rasconc | Dec 30, 2005 09:22pm | #13

    Just did two baths with cast flanges.  One I removed since I was relocating crapper but before that I removed it because I thought I could save the floor.  The other had a similar problem.  I worked it with a hammer and block to remove the flange and cut some off the pipe with a grinder.  It is just a collar slipped over the pipe with some oakum dam and lead.  If careful you can put it back on and stake the lead back tight. 

    At least that is what I have seen.  Good luck.

  4. Shacko | Dec 31, 2005 12:15am | #14

    I don't think that someone without a lot of experience with this type of hook-up can do. If you decide to get a plumber make sure he is old school [Most plumbers nowdays don't know anything about pack and pour]. Sorry for the negative.

    1. xosder11 | Dec 31, 2005 12:33am | #15

      Thats just it, the experience thing. Most people saw it can't be done, but then there are a few people who talk about "banging it down". I don't know anything about pack and pour myself so i guess if we call a plumber I'll make sure they know a bit about that before we have him over.

      1. DanH | Dec 31, 2005 12:46am | #16

        Thing is, there are about a dozen different ways this thing can be put together.  Sometimes the elbow is lead and can be easily bent, sometimes the flange is separate from the elbow and can be removed without too much difficulty, sometimes the flange is cast onto the elbow.  You do need an old plumber, or one who's done a lot of work on old buildings, to figure out the situation and decide if there's a fix.

        Also note that some of these old installations have a 5" flange rather than the 4" one.  This type of flange has a slightly larger outside diameter and can interfere with the toilet somewhere other than at the flange meeting face, and simply grinding down the corners of the flange may be all that's needed.

        BTW, just how proud of the floor is the flange?

         
        If ignorance is bliss why aren't more people

        happy?

        1. xosder11 | Dec 31, 2005 01:23am | #18

          About 1/2", maybe 5/8" at the most.

      2. Shacko | Dec 31, 2005 12:51am | #17

        I'm glad glad you understand my point, lots of luck.

Log in or create an account to post a comment.

Sign up Log in

Become a member and get full access to FineHomebuilding.com

Video Shorts

Categories

  • Business
  • Code Questions
  • Construction Techniques
  • Energy, Heating & Insulation
  • General Discussion
  • Help/Work Wanted
  • Photo Gallery
  • Reader Classified
  • Tools for Home Building

Discussion Forum

Recent Posts and Replies

  • |
  • |
  • |
  • |
  • |
  • |
View More Create Post

Up Next

Video Shorts

Featured Story

Grout-Free Shower Panels

Engineered-stone shower panels are waterproof, but proper installation relies on tight seams and silicone sealing.

Featured Video

A Modern California Home Wrapped in Rockwool Insulation for Energy Efficiency and Fire Resistance

The designer and builder of the 2018 Fine Homebuilding House detail why they chose mineral-wool batts and high-density boards for all of their insulation needs.

Related Stories

  • Old Boots Learn New Tricks
  • Install Denim Insulation Like a Pro
  • Podcast Episode 691: Replacing Vinyl Siding, Sloping Concrete, and Flat vs. Pitched Roofs
  • FHB Podcast Segment: Roofing on Commercial vs. Residential Buildings

Highlights

Fine Homebuilding All Access
Fine Homebuilding Podcast
Tool Tech
Plus, get an extra 20% off with code GIFT20

"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Fine Homebuilding Magazine

  • Issue 332 - July 2025
    • Custom Built-ins With Job-Site Tools
    • Fight House Fires Through Design
    • Making the Move to Multifamily
  • Issue 331 - June 2025
    • A More Resilient Roof
    • Tool Test: You Need a Drywall Sander
    • Ducted vs. Ductless Heat Pumps
  • Issue 330 - April/May 2025
    • Deck Details for Durability
    • FAQs on HPWHs
    • 10 Tips for a Long-Lasting Paint Job
  • Issue 329 - Feb/Mar 2025
    • Smart Foundation for a Small Addition
    • A Kominka Comes West
    • Making Small Kitchens Work
  • Issue 328 - Dec/Jan 2025
    • How a Pro Replaces Columns
    • Passive House 3.0
    • Tool Test: Compact Line Lasers

Fine Home Building

Newsletter Sign-up

  • Fine Homebuilding

    Home building tips, offers, and expert advice in your inbox.

  • Green Building Advisor

    Building science and energy efficiency advice, plus special offers, in your inbox.

  • Old House Journal

    Repair, renovation, and restoration tips, plus special offers, in your inbox.

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters

Follow

  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X
  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X

Membership & Magazine

  • Online Archive
  • Start Free Trial
  • Magazine Subscription
  • Magazine Renewal
  • Gift a Subscription
  • Customer Support
  • Privacy Preferences
  • About
  • Contact
  • Advertise
  • Careers
  • Terms of Use
  • Site Map
  • Do not sell or share my information
  • Privacy Policy
  • Accessibility
  • California Privacy Rights

© 2025 Active Interest Media. All rights reserved.

Fine Homebuilding receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

  • Home Group
  • Antique Trader
  • Arts & Crafts Homes
  • Bank Note Reporter
  • Cabin Life
  • Cuisine at Home
  • Fine Gardening
  • Fine Woodworking
  • Green Building Advisor
  • Garden Gate
  • Horticulture
  • Keep Craft Alive
  • Log Home Living
  • Military Trader/Vehicles
  • Numismatic News
  • Numismaster
  • Old Cars Weekly
  • Old House Journal
  • Period Homes
  • Popular Woodworking
  • Script
  • ShopNotes
  • Sports Collectors Digest
  • Threads
  • Timber Home Living
  • Traditional Building
  • Woodsmith
  • World Coin News
  • Writer's Digest
Active Interest Media logo
X
X
This is a dialog window which overlays the main content of the page. The modal window is a 'site map' of the most critical areas of the site. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page.

Main Menu

  • How-To
  • Design
  • Tools & Materials
  • Video
  • Blogs
  • Forum
  • Project Guides
  • Reader Projects
  • Magazine
  • Members
  • FHB House

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Popular Topics

  • Kitchens
  • Business
  • Bedrooms
  • Roofs
  • Architecture and Design
  • Green Building
  • Decks
  • Framing
  • Safety
  • Remodeling
  • Bathrooms
  • Windows
  • Tilework
  • Ceilings
  • HVAC

Magazine

  • Current Issue
  • Past Issues
  • Magazine Index
  • Subscribe
  • Online Archive
  • Author Guidelines

All Access

  • Member Home
  • Start Free Trial
  • Gift Membership

Online Learning

  • Courses
  • Project Guides
  • Reader Projects
  • Podcast

More

  • FHB Ambassadors
  • FHB House
  • Customer Support

Account

  • Log In
  • Join

Newsletter

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Follow

  • X
  • YouTube
  • instagram
  • facebook
  • pinterest
  • Tiktok

Join All Access

Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features.

Start Your Free Trial

Subscribe

FHB Magazine

Start your subscription today and save up to 70%

Subscribe

Enjoy unlimited access to Fine Homebuilding. Join Now

Already a member? Log in

We hope you’ve enjoyed your free articles. To keep reading, become a member today.

Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine.

Start your FREE trial

Already a member? Log in

Privacy Policy Update

We use cookies, pixels, script and other tracking technologies to analyze and improve our service, to improve and personalize content, and for advertising to you. We also share information about your use of our site with third-party social media, advertising and analytics partners. You can view our Privacy Policy here and our Terms of Use here.

Cookies

Analytics

These cookies help us track site metrics to improve our sites and provide a better user experience.

Advertising/Social Media

These cookies are used to serve advertisements aligned with your interests.

Essential

These cookies are required to provide basic functions like page navigation and access to secure areas of the website.

Delete My Data

Delete all cookies and associated data